Carotenoids that can be converted into vitamin A in the body are β-carotene, α-carotene, and β-cryptoxanthin. β-Carotene is the most abundant carotenoid found in many fruits and vegetables, which is converted into vitamin A by the body after being absorbed into the bloodstream.
α-Carotene is a carotenoid found in various vegetables, including carrots, pumpkin, and spinach, that can be converted into vitamin A in the body. Beta-cryptoxanthin is another carotenoid that can be converted into vitamin A in the body.
It is found in various fruits and vegetables, including red peppers, papaya, and oranges, and it is thought to be an important source of vitamin A, particularly in populations with low vitamin A intake.
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Vasoconstriction of blood vessels delivering blood to the gut is a likely response when an individual isa) stressed and secreting stress hormonesb) lying down after standing up.c) having an allergy attack with lots of histamine secretiond) responding to increased blood pressuree) eating a meal
Vasoconstriction of blood vessels delivering blood to the gut is a likely response when an individual is a) stressed and secreting stress hormones
Vasoconstriction is the narrowing of the blood vessels that supply the skin. Blood capillaries become more constricted. The vascular system becomes more resistant to blood flow. The blood pressure rises close to the skin. Vasoconstriction could be brought on by the drop in temperature.
Vasoconstriction of the blood arteries supplying blood to the stomach is a likely reaction to being stressed and secreting stress hormones. The body's "fight or flight" reaction is triggered when someone is under stress and secreting stress hormones like adrenaline and noradrenaline, which causes blood vessels in the stomach to constrict and reroute blood flow to the heart, lungs, and brain.
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in the barbary fig genome, the gene for color and the gene for spine size and the gene for drought resistance are located right next to each other on chromosome 1. below is a diagram of the placement of the genes on chromosome 1 for a aabbcc individual. crossing over is more likely to occur between alleles of which genes?
In the barbary fig genome, crossing over is more likely to occur between alleles of color and drought resistance genes.
In genetics, а chromosome is а coiled structure mаde up of DNА thаt cаrries the genetic mаteriаl thаt is pаssed down from one generаtion to the next. Genes, which аre locаted on chromosomes, contаin the genetic code thаt determines аn individuаl's trаits.
Crossing over is the exchаnge of genetic mаteriаl between homologous chromosomes thаt occurs during meiosis I. Аs а result, the linked genes, which аre usuаlly inherited together, аre sometimes sepаrаted. The process of crossing over occurs more frequently between the genes for color and drought resistance genes becаuse color аnd drought resistаnce genes аre further аpаrt from eаch other so crossing over is more likely to occur between them thаn between color аnd spine size genes.
Your question is incomplete, but most probably your full question can be seen in the Attachment.
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Keratin is a protein expressed in skin but not in white blood cells. How many alleles for keratin are in gametes?
-0
-many
-2
-1
-3
Gametes from carriers would carry only one allele for keratin, while gametes from individuals with two copies of the gene (homozygotes) would carry two copies of the same allele. Here option C is the correct answer.
The number of alleles for keratin in gametes depends on the mode of inheritance of the gene that encodes the keratin protein. Specifically, it depends on whether the gene is present in one or two copies in the organism, and whether it is dominant or recessive.
Assuming that the gene for keratin is present in two copies (one inherited from each parent) and is codominant (both copies of the gene are expressed equally), then there would be two alleles for keratin in gametes. This is because gametes carry only one copy of each gene, and the two copies of the gene for keratin would segregate independently during meiosis, resulting in gametes that carry one of two possible alleles.
However, if the gene for keratin is recessive, then individuals who carry only one copy of the gene would not express the protein and would be considered carriers. The number of alleles for keratin in gametes depends on the mode of inheritance of the gene and can be either two (if the gene is codominant) or one (if the gene is recessive).
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Complete question:
Keratin is a protein expressed in the skin but not in white blood cells. How many alleles for keratin are in gametes?
A - 0
B - many
C - 2
D - 1
E - 3
What change did you finally make that changed the air temperature of your location?
The temperature can affect air pressure as well. Lower pressure results from warm air rising. Conversely, cold air will sink and cause rise in air pressure. This is where the terms "low pressure" and "high pressure" come from.
What lowers the air's temperature?Simply put, atmospheric pressure is the force of air pressing down on you from above. As you gain altitude, less air is present above you, resulting in a decrease in pressure.
What causes changes in temperature?The earth's atmosphere now contains more carbon dioxide, methane, and nitrous oxide than it has in any time in the previous 800,000 years. These greenhouse gas emissions and the greenhouse effect have increased the earth's surface temperature.
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Describe the relationship between the size of the ejecta
debris (large or small) and the distance from the impact
site (near or distant).
Explain the reason for this relationship.
Answer:the size-distance relationship of impact debris is a consequence of the energy and velocity of the ejected material, and the dynamics of the impact event itself.
Explanation:The relationship between the size of the ejecta debris and the distance from the impact site is as follows: larger debris tends to be found closer to the impact site, while smaller debris tends to be found farther away.
This relationship can be explained by the physics of the impact event. When a large object, such as an asteroid or comet, strikes the surface of a planet or moon, it generates an enormous amount of energy. This energy is released in the form of a shockwave that propagates through the target material, causing it to be ejected from the impact site.
The largest and most massive fragments of the target material are ejected with the highest velocities and tend to travel the shortest distances before falling back to the surface. These fragments form the "central peak" of the impact crater and are typically composed of rock that was originally located at the deepest levels of the target material.
Smaller fragments, on the other hand, are ejected with lower velocities and tend to travel farther before falling back to the surface. These fragments are often found in a "crater ejecta blanket" that surrounds the central peak and is composed of a mixture of target material and impact melt.
Which structure do sea slugs use to feed on their prey? A. Nematocysts B.an incurrent siphon C. A radula D. A mantle cavity
They sip sponges, coral, anemones, hydroids, tunicates, algae, bryozoans, and sometimes other nudibranchs. A radula, which moves back and forth to get and shred food like a cheese grater, is used by sea hares and nudibranchs to eat. The correct answer is C (A radula),
They consume a wide variety of organisms as they glide about, including hydroids, tunicates, sponges, anemones, and barnacles, to name just a few. At times, they will even consume other nudibranchs. Inside their mouth, they have a hard, toothed feeding structure called a radula that helps them break down food.
The venomous organelles of stinging cells called nematocysts are made by cnidarians like jellyfish. They are capable of mitigating a number of threats and are a highly effective defense mechanism. Despite their soft bodies, the sea slugs in the group Aeolida are virtually immune to these spiny javelins.
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Which of these practices does the most to keep wind and water from carrying away topsoil?
A. Integrated pest management
B. Cover crops
C. Drip irrigation
D. Crop rotation
Answer:
B. Cover crops
Explanation:
several cases of an emerging infectious disease are reported in workers at a research station that borders a tropical rainforest region. the pathogen is identified as a species of bacteria carried by nematodes that infect mosquitos, and disease transmission occurs in a human host following a mosquito bite. which organisms should be targeted in the treatment of infected patients?
We have to target nematodes that infect mosquitoes to stop the transmission of the bacteria causing the disease.
The pathogen is identified as a species of bacteria carried by nematodes that infect mosquitoes, and disease transmission occurs in a human host following a mosquito bite. Antibiotics should be used in the treatment of infected patients.
Why antibiotics?
Antibiotics are substances used to treat bacterial infections. Infection-causing bacteria can be destroyed using antibiotics. Since the pathogen causing the disease is identified as a species of bacteria carried by nematodes that infect mosquitoes, antibiotics should be used to target the bacteria.The patients will be given antibiotics to combat the bacterial infection in their bodies. By taking the right dose of antibiotics, the bacteria will be destroyed, resulting in a complete recovery of the patient. Antibiotics should be administered as soon as possible after an individual has been diagnosed with a bacterial infection.
Why Nematodes?
Nematodes are worms that are parasitic in nature. They are known to cause a variety of diseases, and they are frequently transferred through insect vectors like mosquitoes. The bacteria in question in this question are carried by nematodes that infect mosquitoes.
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A researcher is studying the distribution of auxin in roots and stems exposed to sunlight.He notices that more auxin collects in the sides of stems and roots that are not exposed tolight; however, the effects of this distribution are very different.Why?(Select all thatapply.)A)Auxin prevents cell elongation in the shaded cells of stems.B)Auxin (via ethylene) promotes cell elongation in the shaded cells of roots.C)Auxin (via ethylene) prevents cell elongation in the shaded cells of roots.D)Auxin promotes cell elongation in the shaded cells of stems.
A researcher is studying the distribution of auxin in roots and stems exposed to sunlight. He notices that more auxin collects in the sides of stems and roots that are not exposed to light. The correct options are A, B, and D.
In the given scenario, the researcher noticed that more auxin collects in the sides of stems and roots that are not exposed to light, but the effects of this distribution are very different. The possible effects of this distribution are:
A) Auxin prevents cell elongation in the shaded cells of stems.
B) Auxin (via ethylene) promotes cell elongation in the shaded cells of roots.
C) Auxin (via ethylene) prevents cell elongation in the shaded cells of roots.
D) Auxin promotes cell elongation in the shaded cells of stems.
Therefore, the correct options are A, B, and D. Auxin promotes cell elongation in the shaded cells of stems, whereas in roots, auxin promotes cell elongation through ethylene, but inhibits cell elongation through other mechanisms.
The effects of auxin distribution are different in stems and roots due to its role in cell elongation. In stems, auxin promotes cell elongation in the shaded cells (option D), while in roots, auxin (via ethylene) prevents cell elongation in the shaded cells (option C). This difference in response allows the plant to bend towards sunlight, optimizing its exposure to light for photosynthesis.
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The PCT transports water at a constant rate. This is called (?)
The process in which PCT transports water at a constant rate is called osmosis.
What is Osmosis?Osmosis is the process by which water moves from an area of higher concentration to an area of lower concentration through a semi-permeable membrane until the concentration on both sides is equal. In other words, it's the movement of water molecules across a membrane from an area of high concentration to an area of low concentration.
What is PCT?PCT is the short form of Proximal Convoluted Tubule. It is found in the cortex of the kidney and is the longest and most convoluted section of the nephron, consisting of the renal tubule's first portion. The proximal convoluted tubule is involved in both reabsorption and secretion, reabsorbing salt, water, and glucose from the filtrate as well as secreting ions and other substances that weren't originally filtered out.
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A person has a gene that determines the nail and patellar defect syndrome (D is a dominant trait), as well as the gene that determines the blood group according to the ABO system, are located on the same chromosome at a distance of 10 morganides. List all possible types of gametes in a person with IV blood group and heterozygous for the gene for the defect of nails and kneecap. Describe your response widely, please.
Answer:
Explanation:
MOSCOW CHICKS
the paranasal sinuses are named for the bones where they are located. rank the bones in order starting with the most superior?
The correct order of the bones are: Frontal bone > Ethmoid bone > Sphenoid bone > Maxillary bone.
The paranasal sinuses are named for the bones where they are located, and they include the following four pairs of sinuses:
Frontal sinuses (located in the frontal bone of the forehead)Ethmoid sinuses (located in the ethmoid bone between the eyes)Sphenoid sinuses (located in the sphenoid bone at the base of the skull)Maxillary sinuses (located in the maxillary bone of the cheek)Ranking the bones in order starting with the most superior, we get:
Frontal bone (contains frontal sinuses)Ethmoid bone (contains ethmoid sinuses)Sphenoid bone (contains sphenoid sinuses)Maxillary bone (contains maxillary sinuses)To know more about paranasal sinuses
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while living on the beach for the summer, a college student decides to make several personal changes. first, she goes to the tanning salon to get a good tan. she then visits a tattoo parlor to get a cute tattoo on her wrist. she also frequents a gym, toning her muscles. lastly, she gets a perm, turning her hair curly. how many changes in allele frequency occurred in the student during this summer of change?
Based on the given scenario, the changes mentioned do not directly involve alterations in the genetic material or alleles of the college student. The changes described, such as tanning, getting a tattoo, toning muscles, and getting a perm, are all temporary or superficial changes that do not affect the student's DNA sequence or allele frequencies.
Allele frequency refers to the proportion of a particular allele in a population. It can change over time due to various factors like mutation, natural selection, genetic drift, or migration.
Allele frequencies can change over time due to various factors. One of the main factors is natural selection, where certain alleles provide a selective advantage, increasing their frequency in subsequent generations. Genetic drift, which refers to random changes in allele frequencies due to chance events, can also impact allele frequencies, particularly in small populations.
Therefore, the changes described in the scenario are unrelated to genetic changes or alterations in allele frequency.
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What are the steps in binary fission from first to last starting at the top
Binary fission is a type of asexual reproduction. It is the division of a single entity into two or more parts and the regeneration of those parts into separate entities that are similar in size and shape to the original entity.
What is binary fission?Binary fission is a type of asexual reproduction. It is the division of a single entity into two or more parts and the regeneration of those parts into separate entities that are similar in size and shape to the original entity. Binary fission is the main form of reproduction in prokaryotes. It is a fast process that takes about 20 minutes.
What are the steps in binary fission?The steps involved in binary fission from the first to the last are as follows:
Replication of the chromosome: The first step in binary fission is the replication of the chromosome. This process takes place in the cytoplasm.Elongation of the cell: Once the chromosome is replicated, the cell elongates. The elongation of the cell is due to the synthesis of new cell wall material.Cell division: The next step in binary fission is cell division. The cell divides into two daughter cells. Each daughter cell has one copy of the replicated chromosome.Separation of the daughter cells: In the final step of binary fission, the daughter cells separate. The cell wall and the membrane of the cell pinch inwards, dividing the cytoplasm into two equal parts. The daughter cells are identical to the parent cell.The steps in binary fission from first to last are: Replication of the chromosome, Elongation of the cell, Cell division, and Separation of the daughter cells.
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Why are the recombinants produced from an Hfr×F− cross rarely, if ever, F+?Because the conjugation tube is fragile, the likelihood for complete transfer is low.Because the F factor is the last element to be transferred, the likelihood for complete transfer is low.Because the F factor is the first element to be transferred, the likelihood for complete transfer is high.Because the F factor is the last element to be transferred and the conjugation tube is fragile, the likelihood for complete transfer is low.
The recombinants produced from an Hfr×F− cross are rarely, if ever, F+ because the F factor is the last element to be transferred during conjugation.
The likelihood of complete transfer of the F factor is low because the conjugation tube is fragile and can rupture before the transfer of the F factor is complete. Additionally, the F factor is small and can be lost or left behind in the conjugation tube, leading to incomplete transfer. As a result, the recombinants produced from an Hfr×F− cross are rarely, if ever, F+.
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which functions are controlled through the autonomic nervous system? 1. blood pressure 2. heart rate 3. water balance 4. temperature regulation which functions are controlled through the autonomic nervous system? 1. blood pressure 2. heart rate 3. water balance 4. temperature regulation 1, 2, 3 1 and 2 1 and 3 2, 3, 4 1, 2, 3, 4
The functions that are controlled through the autonomic nervous system are blood pressure, heart rate, water balance, and temperature regulation. The correct option is 1, 2, 3.
What is the autonomic nervous system?The autonomic nervous system is a part of the peripheral nervous system. It controls various involuntary functions of the body. The autonomic nervous system is divided into two parts:
The sympathetic nervous system is responsible for the body's "fight or flight" response in a dangerous situation. It increases heart rate, breathing rate, and blood pressure and prepares the body to respond to a threat. The parasympathetic nervous system, on the other hand, is responsible for the body's "rest and digest" response. It slows down the heart rate, breathing rate, and blood pressure, and prepares the body for relaxation and digestion.What are the functions controlled by the autonomic nervous system?The autonomic nervous system controls various functions in the body. These include:
Heart rateBreathing rateBlood pressureBody temperatureDigestionUrinationDefecationPupillary responseSalivationSweatingSexual arousalHormone secretion etc.Learn more about nervous system: https://brainly.com/question/11538106
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mutations that occur in noncoding sequences may affect gene____
Mutations that occur in noncoding sequences may affect gene protein. An crucial protein can also be produced less or not at all when it is required by a variation.
Noncoding DNA, whether it is considered junk or not, significantly increases the share genome size, which in turn affects a number of fitness-related phenotypic traits like mutation rate, genomic flexibility, cell size, body size, morphology, growth rate, behavior, life cycle, and perhaps even speciation.
A variation, or mutation, in noncoding DNA can activate a gene and induce the production of a protein in the incorrect location or at the incorrect time by changing one of these sections. Gene regulation may be impacted by non-coding mutations that influence regulatory elements by a loss of function, leading to decreased gene expression, or a gain of function, leading to increased gene expression.
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what is the synaptic cleft? a. the gap between the presynaptic neuron and the postsynaptic neuron b. a packet that stores neurotransmitter molecules for release c. a subthreshold depolarization mechanism d. the long-term storage location for calcium ions
The synaptic cleft is the gap between the presynaptic neuron and the postsynaptic neuron. The correct option is a.
What is the synaptic cleft?The synaptic cleft is the gap or space that is found between the presynaptic neuron and the postsynaptic neuron. It is a tiny space between these two nerve cells, and it separates the axon terminal of one neuron and the dendrite of another neuron. The synaptic cleft is a crucial structure in nerve impulse transmission.
It acts as a barrier to the free flow of the nerve impulse from one neuron to another neuron. The synaptic cleft is also referred to as the synaptic gap. This gap is filled with a fluid that is known as interstitial fluid or extracellular fluid.
This fluid allows for the exchange of chemical signals or messages between the presynaptic neuron and the postsynaptic neuron. The messages are transported across the synaptic cleft by neurotransmitters.
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The community is the main celebrant of the Holy Mass. True or false
Answer: False
Explanation:
what enzyme is going to make sure the correct rna nitrogen bases are paired with the dna strand?
Answer: The enzyme responsible for making sure that the correct RNA nitrogen bases are paired with the DNA strand is RNA polymerase.
Explanation: During transcription, RNA polymerase reads the DNA template strand and adds complementary RNA nucleotides to create the RNA molecule. The base pairing between DNA and RNA follows the rules of complementary base pairing, where adenine (A) pairs with uracil (U) and cytosine (C) pairs with guanine (G). The RNA polymerase ensures the correct base pairing by selecting the complementary RNA nucleotide that corresponds to the DNA nucleotide at each position along the template strand.
The process of evolutionary changes that result in formation of new species and groups of species is called
a- temporal evolution.
b- artificial selection.
c- macroevolution.
d- serial evolution.
e- a combination of temporal and serial evolution.
The process of evolutionary changes that result in the formation of new species and groups of species is called macroevolution. So the correct answer is option C.
Macroevolution refers to the large-scale changes that occur over long periods of time, such as the emergence of new species, the diversification of groups of organisms, and the extinction of others. It is a fundamental process in evolutionary biology and helps to explain the diversity of life on Earth. The study of macroevolution involves examining patterns in the fossil record, genetic relationships between different groups of organisms, and the mechanisms that drive the evolution of new traits and the emergence of new species.
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a biochemist determines that a sample of dna contains 20% a. what is the % of g in that same sample?
If a cell contains 20% adenine, it will contain 30% guanine.
Since adenine is 20%, then thymine is 20% as well. The total of both is 40%. From 100 remains 60% which is divided equally between guanine and cytosine, so each is 30%.
The nucleotides that make up DNA are divided into two strands. The nitrogenous bases of the four distinct nucleotides that make up DNA are different. Adenine (A) and guanine are two of the double-ring purine bases found in nucleotides (G). Thymine and Cytidine (C), two single-ring pyrimidine bases, are present in the other two nucleotides (T). Purine and pyrimidine bases are both present in equal amounts in DNA molecules, as shown by the formula A + G = C + T, which was found by Erwin Chargaff.
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who is responsible for the early formation of ideas about gastronomy? a. fernand point b. antonin careme c. j. brillat-savarin d. guillaume tirel
Which type of plant life would be present in a climax community but would NOT be present in the early stages of succession?GrassesTreesWildflowersShrubs
A climax community is composed of a wide variety of plant species, among which many of them are trees of varying heights. The correct option is B. Trees.
The climax community is the designation used to name communities at their maximum level of stability. It is also the highest level in ecological succession.
These communities have a wide diversity of species and complex trophic nets. However, they do not have extents in the production of organic matter. This is because most of it is consumed by the community. This makes them stable.
Vegetable species composing these communities are usually big-sized, and they characterize by their long life cycle, slow growth, and high survival that make them resist many adverse situations. These species exhibit stratification of canopy cover, existing different levels such as herb plants, shrubs, and trees of varying heights.
Trees are the type of plants that usually compose the climax community but are hardly a component of the early stages.
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Complete question:
Which type of plant life would be present in a climax community but would NOT be present in the early stages of succession?
Grasses
Trees
Wildflowers
Shrubs
a forest that was logged in the 1980's but has since been set aside as a reserve that the new trees are growing in essentially undisturbed conditions is the example of which type of forest
The forest that was logged in the 1980s but has been reserved, and new trees are growing in undisturbed conditions is the example of a secondary forest.
What is a secondary forest?A secondary forest is a forest that grows on previously cleared land, such as abandoned farmland or logged forest areas. In other words, a forest that was previously cleared of trees and has regrown naturally or been replanted is known as a secondary forest.
A secondary forest is formed in areas that have previously been cleared of natural forests. Natural forests can be destroyed by human activities like deforestation, wildfires, or land-use changes. These forests regenerate spontaneously, with little or no human intervention, and serve as a significant carbon sink.
However, secondary forests are still ecologically valuable, even if they are not as biodiverse as mature forests. They play an important role in absorbing atmospheric carbon and producing oxygen while providing habitat for a wide range of animal species.
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Which of these are NOT a part of the Excretory System? (Select the 2 correct answers)
Adrenal glands
Urethra
Bladder
Brain
Salivary Glands
Answer:
Brain and Salivary Glands
Explanation:
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Which organ prevents calcium loss in response to PTH stimulation?
-intestines
-kidney
-bone
-heart
Calcium loss is stopped by the bones organ in response to PTH stimulation. Bones: Parathyroid hormone stimulates the bloodstream's absorption of calcium from the bones' substantial calcium stores. Option 3 is Correct.
This causes more bone to be destroyed and less bone to grow. Calcium loss in urine is decreased by parathyroid hormone in the kidneys. The "C" cells (parafollicular) of the thyroid gland secrete calcitonin when serum calcium levels go overboard, which can prevent bone calcium resorption and help maintain serum calcium levels within the normal range.
Parathyroid hormone is directly involved in the bones, kidneys, and small intestine. PTH stimulates the release of calcium from the bones through osteoclasts, an indirect process that ultimately results in bone resorption. Option 3 is Correct.
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Correct Question:
Which organ prevents calcium loss in response to PTH stimulation?
1. intestines
2. kidney
3. bones
4. heart
What structures are inside the ovary?
Glycolysis is active when cellular energy levels are _____; the regulatory enzyme, phosphofructokinase, is _____ by ATP.a. low; inhibitedb. high; inhibitedc. low; activatedd. high; activated
Glycolysis is active when cellular energy levels are low; the regulatory enzyme, phosphofructokinase, is inhibited by ATP. the correct option is A
Glycolysis is the process by which cells break down glucose molecules to obtain energy. This process requires a certain level of cellular energy, which is determined by the concentration of ATP. When the levels of ATP are low, phosphofructokinase, the enzyme responsible for controlling the rate of glycolysis, is inhibited, thereby slowing down the rate of glycolysis.
As a result, cells must rely on other forms of energy such as fatty acids and ketone bodies to obtain energy. On the other hand, when cellular energy levels are high, phosphofructokinase is activated and glycolysis is sped up to meet the cells' energy needs. Therefore, glycolysis is activated when cellular energy levels are low, and the regulatory enzyme, phosphofructokinase, is inhibited by ATP. Therefore the correct option is A
The complete question is :
Glycolysis is active when cellular energy levels are _____; the regulatory enzyme, phosphofructokinase, is _____ by ATP.
a. low; inhibited
b. high; inhibited
c. low; activated
d. high; activated
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True/False? in the sense-integrate-act loop, the brain is always where signals are integrated.
Answer:
True.
Explanation:
:)