During glycolysis, two net ATP and two NADH are produced for every glucose molecule.
The process of releasing energy from sugars is called glycolysis, which translates to "breaking sugars." A six-carbon sugar called glucose is broken into two molecules of a three-carbon sugar called pyruvate during the process of glycolysis. This multi-step process produces two molecules of free-energy-containing ATP, two molecules of pyruvate, two molecules of high-energy, electron-carrying NADH, and two molecules of water.
Oxygen can be present or absent during glycolysis. Glycolysis is the initial phase of cellular respiration when oxygen is present. Through a process of fermentation, glycolysis enables cells to produce minute amounts of ATP in the absence of oxygen.
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Which image shows a nonrenewable resource?
A plant
An aluminum nugget
Wood
Energy from the sun
The image which shows a nonrenewable resource is an aluminum nugget and is therefore denoted as option B.
What is a Nonrenewable resource?This is referred to as a natural resource that cannot be readily replaced by natural means at a pace quick enough to keep up with consumption and it includes substances such as metals, fossil fuels etc.
We should note that aluminum nugget is made up of a metal and cannot be replaced by natural means which us why recycling of these substances occur in other to meet up with the demand thereby making it the correct choice.
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Most species of bacteria cannot be eaten by humans because
A. the bacteria contain toxic levels of proteins.
B. the bacteria contain toxic levels of nucleotides.
C. the bacteria contain toxic phospholipids in their membranes.
D. the bacteria contain water levels that would stress the kidneys.
Most species of bacteria cannot be eaten by humans because option B. the bacteria contain toxic levels of nucleotides.
Small, single-celled organisms called bacteria exist. Nearly all areas of the world are home to bacteria, which are essential to its ecosystems. Some species can survive in environments with high pressure and temperatures. The majority of bacteria are not harmful, however some can be harmful. Pathogens include the germs in question.
Nucleotides are organic compounds made up of a phosphate and a nucleoside. They also play roles in metabolic processes, enzyme reactions, and cell signalling. Nucleotides play a key role in energy-transfer activities, are the building blocks for the production of nucleic acids, and serve as coenzymes.
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help me hurry up pls
ESSAY: NUTRITION
Here is your goal for this lesson:
Write an essay about nutrition
Cover the topic as completely as possible. This essay should be at least 1,000 words. Include a short bibliography.
Before you write this essay, read more about earth pollution, food processing, food refining, and so forth. Many books and magazines on these subjects are available. An excellent book is Food for Life by Neal Barnard, M.D. Mother Earth and Let's Live are two good magazines.
When you write your essay in response to information you have gained, spend time to prepare what you are going to say. State your own opinions, too, after stating the facts you have learned.
As the name suggests, ‘nutrition’ includes in itself’ nutrients’ which can be broadly classified as carbohydrates, proteins, fats, vitamins, minerals, roughage, and water. A balanced amount of these nutrients in the right proportions constitute a healthy diet.
The words’ balanced’ and ‘right proportions’ mentioned previously are key to life when it comes to consuming nutrients. ‘Optimum Nutrition’ is defined as eating the right amount of nutrients in a proper schedule to achieve the best performance and longest possible lifetime in good health. The importance of nutrition can be visibly highlighted by the increasing number of nutrient deficiency diseases such as night blindness, scurvy, cretinism, anemia, and nutrient excess health-threatening conditions like obesity, metabolic syndrome, and other cardiovascular anomalies.
Undernutrition in underdeveloped and developing countries has been marked by malnutrition due to lack of even the basic staple nutrients causing diseases like marasmus and kwashiorkor. Animal nutrition on the molecular level comes from nitrogen, carbon, and hydrogen compounds. Nutrients are the building blocks of the food chain, which interlink to form food webs and influence world food production via biodiversity.
Similarly, plant nutrition is referred to as the chemicals that are necessary for plant growth and other physiological processes in plants like metabolism, transport, photosynthesis, etc. Nutrients essential for plants are obtained from the soil, air, sunlight, and as a whole from the earth; thus, the nutrients can be recycled and renewed, making it easily available for sustenance of life.
Fatigue, tiredness, and apathy are common among the working class as well as students. To feel refreshed, motivated as well as reenergized, all we require is the proper nutrition for our systems. Nutrition helps an individual attain optimal health throughout life as well as boost self-esteem.
Eating a balanced diet improves a person’s health and well-being and reduces risks of major causes of death. The other benefits of nutrition include a healthy heart, strength in teeth and bones, maintains good brain health, boosts immunity, bolsters the body to fight against diseases, keeps higher energy levels, and keeps the bodyweight at check. With such a minimum as maintaining our diet comes the strength of independence or self-dependence. The topic of nutrition has gained its importance by being studied and researched over for years. Nutrition is taught as a subject in various levels of education, and professions such as farmers, scientists, nutritionists, dietitians, health counselors, and doctors who form the pillar of our society are all based on nutrition fundamentals.
Progressive research works from various parts of the world on ‘nutrition’ has helped in aiding health conditions for the living, yet a big section of society is not reached out for proper food supplies. With the current progressive rate of scientific enhancement in the field of nutrition, resulting in increasing food production, we should be able to reach out to those who are dying due to the lack of something as basic as food, which should be available to everyone equally.
Answer:As the name suggests, ‘nutrition’ includes in itself’ nutrients’ which can be broadly classified as carbohydrates, proteins, fats, vitamins, minerals, roughage, and water. A balanced amount of these nutrients in the right proportions constitute a healthy diet.
The words’ balanced’ and ‘right proportions’ mentioned previously are key to life when it comes to consuming nutrients. ‘Optimum Nutrition’ is defined as eating the right amount of nutrients in a proper schedule to achieve the best performance and longest possible lifetime in good health. The importance of nutrition can be visibly highlighted by the increasing number of nutrient deficiency diseases such as night blindness, scurvy, cretinism, anemia, and nutrient excess health-threatening conditions like obesity, metabolic syndrome, and other cardiovascular anomalies.
Undernutrition in underdeveloped and developing countries has been marked by malnutrition due to lack of even the basic staple nutrients causing diseases like marasmus and kwashiorkor. Animal nutrition on the molecular level comes from nitrogen, carbon, and hydrogen compounds. Nutrients are the building blocks of the food chain, which interlink to form food webs and influence world food production via biodiversity.
Similarly, plant nutrition is referred to as the chemicals that are necessary for plant growth and other physiological processes in plants like metabolism, transport, photosynthesis, etc. Nutrients essential for plants are obtained from the soil, air, sunlight, and as a whole from the earth; thus, the nutrients can be recycled and renewed, making it easily available for sustenance of life.
Fatigue, tiredness, and apathy are common among the working class as well as students. To feel refreshed, motivated as well as reenergized, all we require is the proper nutrition for our systems. Nutrition helps an individual attain optimal health throughout life as well as boost self-esteem.
Eating a balanced diet improves a person’s health and well-being and reduces risks of major causes of death. The other benefits of nutrition include a healthy heart, strength in teeth and bones, maintains good brain health, boosts immunity, bolsters the body to fight against diseases, keeps higher energy levels, and keeps the bodyweight at check. With such a minimum as maintaining our diet comes the strength of independence or self-dependence. The topic of nutrition has gained its importance by being studied and researched over for years. Nutrition is taught as a subject in various levels of education, and professions such as farmers, scientists, nutritionists, dietitians, health counselors, and doctors who form the pillar of our society are all based on nutrition fundamentals.
Progressive research works from various parts of the world on ‘nutrition’ has helped in aiding health conditions for the living, yet a big section of society is not reached out for proper food supplies. With the current progressive rate of scientific enhancement in the field of nutrition, resulting in increasing food production, we should be able to reach out to those who are dying due to the lack of something as basic as food, which should be available to everyone equally.
Explanation:
in gene expression, how is the promoter different from the start codon?
Start codons are the first bases that are translated on an mRNA, whereas promoters are the regions of DNA where transcription begins.
A promoter sequence must precede a gene for it to be transcribed. The attachment recognition site of the transcription enzyme RNA polymerase can be found here. An initiator sequence comes after the promoter sequence, indicating the location where m-RNA transcription begins. On m-RNA, the sequence AUG, which is also codon 1 and corresponds to the amino acid methionine, is the initiator codon or start signal. Additionally, it marks the beginning of translation.
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can you match terms related to operons to their definitions? drag the terms on the left to the appropriate blanks on the right to complete the sentences. view available hint(s)
1. An operon, which typically makes up an entire metabolic pathway, is a segment of DNA that contains an operator, a promoter, and genes for a related group of proteins.
2. Following the promoter, the genes of an operon are organized sequentially.
3. An RNA polymerase binds to a particular nucleotide sequence in DNA known as a(n) promoter, positioning it to begin RNA transcription at the proper location.
4. A gene called a regulatory encodes a protein called a repressor that regulates the transcription of another gene or set of genes.
5. Regulatory proteins bind to the operon to regulate operon expression.
6. A protein called a repressoris prevents the transcription of genes. This protein binds to the DNA within or close to the promoter in prokaryotes.
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in addition to activating or inhibiting enzymes through allosteric regulation, what other means does a cell use to control enzymatic activity? question 29 options: assembly of enzymes into large aggregates altering internal ph secretion of enzymes out of the cell localization of enzymes into specific organelles or membranes
RNA polymerase translating RNA. It forms the sequence 3' GACU 5' by replicating the same sequences as it passes through the region highlighted in bold red.
In order to employ one strand of RNA polymerase and the exposed nucleotides as a template for the transcription of RNA, the RNAP enzyme uses helicase to locally open the double-stranded DNA. Before RNAP can start the DNA unwinding at a specific location, a transcription mediator complex, and a transcription factor must be connected to a DNA binding site known as a promoter region. In addition to starting RNA transcription, RNAP also guides nucleotides into place, promotes attachment and elongation, functions as an integrated replacement and proofreader, and has the ability to recognize terminations. RNAP can create chains in eukaryotes that are up to 2.4 million nucleotides long.
The complete question is:
What other mechanisms does a cell employ to regulate enzymatic activity besides activating or inhibiting enzymes through allosteric regulation?
A) the placement of enzymes within particular organelles or membranes
B) secretion of enzymes out of the cell
C) assembly of enzymes into large aggregates
D) altering internal pH
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Select all inheritance patterns in which 50% of the functional protein is sufficient to produce a wild-type phenotype: 1) Simple Mendelian dominant alleles 2) An X-linked dominant allele in a heterozygous female 3) Haploinsufficient genes 4) Incomplete dominance
The inheritance patterns in which 50% of the functional protein is sufficient to produce a wild-type phenotype are: Haploinsufficient genes and X-linked dominant allele .
Haploinsufficient genes: In haploinsufficient genes, a single copy of a functional allele is sufficient to produce a wild-type phenotype. This is because the presence of a single functional allele produces enough functional protein to perform its normal cellular functions.
X-linked dominant allele in a heterozygous female: In this inheritance pattern, a dominant allele located on the X chromosome results in a wild-type phenotype when present in a heterozygous female. This is because females have two X chromosomes, so the presence of a single functional allele on one X chromosome is sufficient to produce enough functional protein to produce a wild-type phenotype.
These inheritance patterns contrast with Simple Mendelian dominant alleles and incomplete dominance, in which both copies of the allele must be functional to produce a wild-type phenotype. In simple Mendelian dominant alleles, an individual with a single dominant allele will express the dominant phenotype. In incomplete dominance, neither allele is completely dominant, and a blend of the two alleles' phenotypes is expressed.
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How do transposable elements contribute to genome evolution?
Explanation:
Transposable elements (TEs) are DNA sequences that are capable of integrating into the genome at a new site within the cell of its origin. Sometimes, the change in their positions creates or reverses mutations, thereby altering the cell's genotype.
In addition to serving as building blocks of DNA, what other function do nucleotides perform in a cell?a. regulate cellular activityb. activate vesicular transportc. trigger muscle contractionsd. regulate gene expressione. chaperone protein folding
The other role of nucleotides in a cell is to control cellular activity.
What other functions do nucleotides perform in a cell?Building blocks of nucleic acids, energy storage, carriers of activated metabolites for biosynthesis, structural moieties of coenzymes, and metabolic regulators are all roles that nucleotides play in the physiology of animals. An chemical molecule known as a nucleotide serves as the foundation for DNA and RNA. They also play roles in metabolic processes, enzyme reactions, and cell signaling.
What role do nucleotides play in DNA?In rapidly dividing stages, nucleotides are particularly important for DNA replication and RNA transcription. Additionally necessary for supplying the cellular energy sources (ATP and GTP), nucleotides are also in a variety of other metabolic functions.
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a dihybrid cross (tracking flower color and stem length) is carried out. what proportion of the progeny will be true-breeding?
One-quarter of the progeny will be genuine breeding, as with every dihybrid cross.
A dihybrid cross is a mating event in which two dihybrid individuals mate. As a result, the offspring phenotypic ratio is 9:3:3:1.
Both the product rule and the Punnett Square techniques revealed that the progeny of a dihybrid cross, such as Mendel's RrYy RrYy, should have a 9:3:3:1 phenotypic ratio.
True breeding implies that all crossings will produce children with the same phenotype, suggesting that the organism is homozygous for all genes. For example, a true-breeding purple plant crossed with itself will always produce purple offspring.
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Stages of breast cancer indicate the ________ of a tumor.
color
form
spread
size
Stages of breast cancer indicate the spread of a tumor to distant parts of the body.
The aberrant growth of some breast cells which causes breast cancer keep on multiplying and divide more quickly than healthy cells do, generating a bulk or lump. In order to reach your lymph nodes or other regions of your body, cells can expand (metastasize) through your breast.
Groups of cells that have the ability of uncontrollably expanding and dividing are known as tumours, which are abnormal growths of tissue whose protrusion is uncontrolled. The research of cancer and tumours is known as oncology. When a tumour is malignant, or has the ability to do harm, even cause death, it is referred to as "cancer."
The question is incomplete, find the complete question here
Stages of breast cancer indicate the ________ of a tumor to distant parts of the body.
color
form
spread
size
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in which method of dna replication would all parent dna be conserved in the original molecule? dispersive semi-conductive extracellular conservative semi-conservative
Semi-conservative replication method of DNA replication would all parent DNA be conserved in the original molecule.
According to the semi-conservative model, the parental molecule leads the creation of a brand-new double-stranded molecule, resulting in the conservation of one molecule as two previously existing strands after one cycle of replication.
Due to the presence of one strand from the helix it was cloned from, each helix formed during DNA replication is semi-conservative. Two daughter helices, each of which includes one of the original parental helical strands, are produced when one helix is replicated.
That is the definition of "semi-conservative replication." In each of the daughter molecules, half of the original DNA is preserved (maintained). According to the conservative replication hypothesis, a new double helix is created using the full original DNA double helix as a template.
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What is the momentum of a 54 kg dog with a velocity of 4 m/s.
Science
Answer: 216 kg·m/s
Explanation: Momentum Calculator
which of the following is true regarding the use of the dark field microscopy. question 11 options: a) this can be used to view live organisms. b) this type of microscopy is typically combined with the use of basic dyes. c) the image is formed only by reflected and refracted light rays. d) a and c
The correct statement about dark field microscopy is: a) this can be used to view live organisms; c) the image is formed only by reflected and refracted light rays.
Dark field microscopy is the technique where objects are observed under oblique illumination by creating a contrast of the specimens. The technique can be applied to observe live organisms and it does not require the use of staining dyes as well.
Light rays are the geometric representations indicating the path of the light. These always travel in straight lines. The direction of light can only be changed by phenomena like reflection or refraction.
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who formulated the hypothesis that certain chemicals could kill microbes without harming humans was the foundation for chemotherapy?
Ehrlich. German chemist and physician Paul Ehrlich (1854–1915) set out in the early 1900s to find or create chemical compounds that might kill infectious microorganisms without injuring the patient.
Sahachiro Hata, Ehrlich's assistant (1873–1938), discovered one such "magic bullet" in 1909 after screening more than 600 compounds containing arsenic. Chemical 606 was intended to kill the syphilis-causing bacteria Treponema pallidum. When it was discovered that compound 606 effectively treated syphilis in rabbits, it was utilized to develop salvarsan, a drug used to treat syphilis in people. Ehrlich's innovative method of painstakingly screening a wide range of chemicals is still a crucial part of the hunt for novel antimicrobial agents today.
The complete question is:
Who formulated the hypothesis that certain chemicals could kill microbes without harming humans was the foundation for chemotherapy?
KochListerEhrlichPasteurGramLearn more about chemotherapy here:
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Bacteria and archaeans are similar in all of the following ways except _____.
(a) they are both relatively small compared to eukaryotic cells
(b) they both reproduce rapidly
(c) they both have complex membrane-bound organelles
(d) they both lack a true nucleus.
Bacteria and archaeans do not consist of complex membrane bound organelles in their cell bodies.
The correct option is option c.
A prokaryotic cell is basically a simple as well as single-celled or we can say unicellular organism which lacks a nucleus and any other membrane-bound organelle. Prokaryotic DNA is basically found in the central part of the cell which is a darkened region known as the nucleoid.
Bacteria and archaeans are both relatively small in size when compared to eukaryotic cells. They both are able to reproduce rapidly and lack the presence of a true, well-defined nucleus. They also do not have complex membrane bound organelles.
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a man with blonde hair, blue eyes, and fair skin has a daughter with a woman with dark hair, brown eyes, and dark skin. (assume that hair, eye, and skin color are each dependent on a single gene.) based on their differences in these three traits, how many possible phenotypic combinations are possible for their child? a
There would be 12 possible phenotypic combinations for hair, eye, and skin color.
Hair color, eye color, and skin color are each dependent on a single gene with multiple alleles, and each of these traits is controlled by a different set of genes.
Blonde hair is typically associated with the B allele, while dark hair is typically associated with the b allele. Blue eyes are typically associated with the E allele, while brown eyes are typically associated with the e allele. Fair skin is typically associated with the S allele, while dark skin is typically associated with the s allele.
Based on this information, the man would be homozygous for the BbEeSs genotype, while the woman would be homozygous for the bbeess genotype.
The possible phenotypic combinations for their child would be BbEe, BbEe, BbEe, BbEe, bbEe, bbEe, bbEe, bbEe, BbeEe, BbeEe, bbeEe, and bbeEe, resulting in 12 possible phenotypic combinations for hair, eye, and skin color.
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what type of bonds form between the codon of mrna and the anticodon of trna?
Hydrogen bonds are the types of bonds which are formed between the codon of the mRNA and the anticodon of the tRNA.
A particular site which is present on each of the tRNA forms a three base anticodon which is found to be complementary to a specific codon present on the mRNA.
Hydrogen bonds are the type of bonds which are required to bind the complementary bases which are present on codon as well as on the anticodon together. On the mRNA, codon happens to form hydrogen bonds with a tRNA anticodon site. The ribosome is able to allow the tRNA to be bound to the mRNA which is bearing a particular complimentary amino acid.
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The role of the chordae tendineae is to open the AV valves at the appropriate time. (T/F)
True, chordae tendineae opens the AV valves at the approximate time.
What are chordae tendineae?The chordae tendineae are small, string-like structures that attach the cusps of the AV valves to the papillary muscles of the heart. When the ventricles contract, the papillary muscles contract, which pulls the chordae tendineae tight and causes the AV valves to open. This allows blood to flow from the ventricles into the atria. When the ventricles relax, the papillary muscles relax and the chordae tendineae loosen, which causes the AV valves to close, preventing blood from flowing back into the ventricles.
They are an essential part of the cardiac cycle that plays an important role in maintaining normal blood flow. Without them, the AV valves would not open and close properly, which could lead to abnormal blood flow, heart murmurs, and even heart failure.
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which of the following is not true of persistent viral infections? which of the following is not true of persistent viral infections? disease process occurs gradually over long period continuous, low-level viral shedding for months or years none of the other four answers (all are true of persistent viral infections) prolonged, ongoing slow replication of a virus over a long time a virus or its nucleic acid remains inactive (non-replicating) in the host
The statement "a virus or its nucleic acid remains inactive (non-replicating) in the host" is not true of persistent viral infections.
Persistent viral infections are characterized by the prolonged, ongoing replication of a virus over a long period of time.In persistent viral infections, the virus is able to replicate within the host without causing significant harm to the host. This allows the virus to persist in the host for long periods, sometimes even for the lifetime of the host.
As a result, the host is able to continuously shed the virus, leading to a low-level of viral shedding for months or years.The disease process in persistent viral infections occurs gradually over a long period, as the virus replicates and spreads within the host. The long-term replication of the virus can lead to a gradual decline in the host's health, but the decline is often slow and subtle.
In conclusion, "a virus or its nucleic acid remains inactive (non-replicating) in the host" is not true of persistent viral infections. Persistent viral infections are characterized by the prolonged, ongoing replication of a virus in the host.
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an individual comes to the blood bank as a donor for plasmapheresis. he previously donated plasma 8 weeks ago. his pulse rate is 80 beats per minute; blood pressure 120/80; hct is 40%. what is the next course of action? group of answer choices
The individual who has come to blood bank as a donor for plasmapheresis, has the pulse rate is 80 beats per minute; blood pressure 120/80; HCT is 40%. and therefore we will accept the individual as a donor.
Plasmapheresis is basically a method which is used for removing blood plasma from the body. It first involves withdrawing the blood, then separating it into plasma as well as cells and then transfusing the cells back into the bloodstream. It is performed especially to remove antibodies in order to treat many autoimmune conditions.
There are certain conditions which should be met before accepting a blood donor for plasmapheresis. Since the individual has the pulse rate is 80 beats per minute; blood pressure 120/80; HCT is 40%, we can accept them as a blood donor.
--The given question is incomplete, the complete question is
"An individual comes to the blood bank as a donor for plasmapheresis. he previously donated plasma 8 weeks ago. his pulse rate is 80 beats per minute; blood pressure 120/80; HCT is 40%. What is the next course of action? a. Accept him as a donor b. Reject him as a donor c. Cannot be determined."--
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A mechanism by which experts in a field carefully screen the work of their colleagues is known as ____________.
A) experimental validity
B) experimenter bias effect
C) peer review
D) peer assessment
C) peer review
What is peer review?
Peer review is a process by which subject matter specialists thoroughly scrutinize the work of their peers. Peer review's objective is to verify that research findings are accurate and of high quality by having other authorities in the same field assess them. Peer review is a process where experts in the field assess a research study's procedures, findings, and conclusions objectively and offer helpful criticism to the authors. This assists with enhancing the research's quality, boosting its reputation, and locating any errors or biases that might be present. Peer review is a crucial step in the scientific method and is utilized in many disciplines, such as biology, physics, psychology, and medicine.
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Which function does tRNA serve in a cell?
O combines with proteins to form a ribosome
O bonds amino acids together to form proteins
O collects amino acids for translation
O carries genetic information to ribosomes
O transports amino acids to ribosomes. During the translation process, transfer RNA (tRNA) transports certain amino acids to the ribosome, where they are joined together to form a protein. The information encoded in messenger RNA guides this process (mRNA).
What is RNA?Ribonucleic acid is a polymeric molecule that plays important functions in gene coding, decoding, regulation, and expression. Nucleic acids include RNA and deoxyribonucleic acid. Ribonucleic acid (RNA) is a nucleic acid found in all living cells that is structurally identical to DNA. RNA, unlike DNA, is typically single-stranded. Instead of the deoxyribose present in DNA, the backbone of an RNA molecule is formed of alternating phosphate groups and the sugar ribose. RNA's principal job is to generate proteins through translation. RNA provides genetic information, which ribosomes transcribe into diverse proteins required for biological functions. The three primary forms of RNA involved in protein synthesis are mRNA, rRNA, and tRNA.
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what is the function of bile? group of answer choices enhances absorption of complex carbohydrates protects the stomach and small intestine from the action of hydrochloric acid initiates digestion of protein emulsifies lipids
The function of bile is to emulsify lipids.
What is the function of bile?Bile is a fluid produced by the liver and stored in the gallbladder. Its main function is to emulsify lipids, or fats, and aid in their digestion and absorption in the small intestine.
Bile works by breaking down large fat droplets into smaller droplets, which increases the surface area for the action of digestive enzymes, such as lipases, to break down the fat into smaller components that can be absorbed into the bloodstream. In this way, bile plays an important role in the digestion and absorption of dietary fats and the maintenance of proper lipid metabolism.
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telomeres are found at the ends of linear chromosomes. these structures have two primary functions. one function is to prevent the shortening of the ends of chromosomes during replication. the reason they can do this is because the telomere repeat sequence can be extended by:
Telomere repeat sequence can be extended by telomerase enzyme.
How can be telomeres extended?For all kinds of telomeres activity, there is a specific enzyme. This enzyme is known as telomerase. This telomerase can extend the telomere by repeated reverse transcription of a short sequence. Telomerase is basically RNA-dependent DNA polymerase. So, according to its name, it can use RNA as a template to produce DNA. This enzyme adds complementary RNA bases to the 3' end of the DNA strand. When the 3' end of the lagging strand template is elongated completely, DNA polymerase can add nucleotides to the ends of the chromosomes.
So, telomere repeat sequence is extended by telomerase enzyme.
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Select the three components of the cell theory devised in the mid-1800s.a. The cell is the fundamental unit of all life.b. All organisms are made of one or more cells.c. All cells originate from preexisting cells.
Three components of cell theory were devised in the mid-1800s.
The cell is the basic unit of all life.All organisms are composed of one or more cells.All cells come from pre-existing cells.The first person to make observations and self-descriptions was Robert Hooke, a scientist from England. In 1665, Hooke used a light microscope to view thin slices of cork obtained from plants. Anton van Leeuwenhoek, a German lens maker, was the first to observe and describe a living cell. In 1674, van Leeuwenhoek observed microscopic unicellular objects in lowering lake water without using a microscope.
After being supported by observations and other data, in the mid-1800s the cell theory emerged which stated that.
(1) All life is composed of one or more cells.
(2) Cells are the basic structure of life; cells carry out all life processes.
(3) Cells come from other living cells.
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what characterizes depolarization, the first phase of the action potential?
Depolarization is a change within a cell, during which the cell undergoes a shift in electric charge distribution, resulting in less negative charge inside the cell compared to the outside. Depolarization is essential to the function of many cells, communication between cells, and the overall physiology of an organism.
Cell depolarization, or membrane depolarization, is a process that shifts the electrical charge distribution so that the cell is less negatively charged compared to the environment. In other words, during depolarization, the membrane potential becomes less negative. Cell depolarization is crucial because it allows cells to send messages quickly and in a uniform way. It also allows for fast communication over long distances in the body.
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You have 2 samples, each containing a different DNA fragment. The fragments are the same size but have different sequences. You know what the sequence should be for each sample, but the labels have worn off and now you don’t know which sample is which. How could you use restriction enzymes to determine which tube contains which DNA sample?
please help, urgent!!
You can use restriction enzymes to determine which tube contains which DNA sample by performing restriction digest on each sample using the same restriction enzyme.
How does restriction enzyme work?If the restriction enzyme cuts the DNA fragments into smaller pieces, the resulting fragments will be different for each sample based on the sequence of each fragment.
By analyzing the pattern of fragments produced from the restriction digest, you can determine which sample corresponds to the known sequence. This can be confirmed by comparing the fragments to a reference DNA ladder or by sequencing the fragments.
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Question 6
14.3 pts
Let's test your understanding of the limitations of scientific models. Here are four
statements that involve scientific models. Choose the correct statement, based on
what you just learned.
One model of Earth's climate predicts that global temperatures will rise by 2.5-5.0 F. The
model gives a range, because there are some uncertainties about future human behavior.
O A model that is not exactly correct is useless.
An evolutionary model says that orangutans evolved between 12 and 16 million years ago.
Because this model does not give an exact value, it must be wrong.
OIf I cross two pea plants and get something slightly different than predicted by Mendel, his
model should be thrown away because it is incorrect.
The student's claim did not follow the scientific method of discovery, hence, it is an opinion not a scientific claim.
What is the scientific method?The scientific method is a procedure employed by scientific towards understanding the world around them as well giving explanation for phenomena in the natural world.
The scientific method involves:
observationsasking questionsputting forward a hypothesistesting the hypothesis through experimentsanalyzing results of the experiments and drawing conclusionsestablishing a theory.Since, the student in question just put forward an opinion without testing it out using the scientific method, the statement is not a scientific claim.The student's claim did not follow the scientific method of discovery, hence, it is an opinion not a scientific claim.
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the plates you are using for this lab will be autoclaved to completely sterilize them. the measures taken to disinfect the tabletops (the source of the organisms on plates 2 and 3) are not as extreme. why?
In this case- the agar plates were used to GROW bacteria on them they have become a bio-hazard. The tabletop is easily disinfected with alcohol or many other chemicals.
A biological substance that endangers the health of living things, especially humans, is referred to as a biological hazard or biohazard. A sample of a microorganism, virus, or toxin that can be harmful to human health may be included in this. A substance poisonous to other animals can also be considered a biohazard.
The term and its corresponding symbol are typically used as a warning so that people who may be exposed to the substances are aware of the need for safety measures. Charles Baldwin, an environmental-health engineer working on the containment products for the Dow Chemical Company, created the biohazard symbol in 1966. [1]
It is applied to the labeling of biological items that pose a serious health risk, such as used hypodermic needles and viral samples.
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