The enzyme that unwinds the double helix of DNA in preparation for DNA replication is called RNA helicase.
What is DNA replication ?A double-stranded DNA molecule is copied to create two identical DNA molecules through the process of DNA replication. Because every time a cell splits, the two new daughter cells must have the same genetic material, or DNA, as the parent cell, replication is a crucial process. DNA replication, as used in molecular biology, is the biological process that creates two identical copies of DNA from a single original DNA molecule. All living things replicate their DNA, which is the primary mechanism for biological heredity.
The series of events that occur during prokaryotic DNA replication have been explained below.
InitiationPrimer SynthesisLeading Strand SynthesisLagging Strand SynthesisPrimer RemovalLigationTermination.To know more about DNA replication please click here ; https://brainly.com/question/21265857
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NOTE: The given question is incomplete on the portal. Here is the complete question.
QUESTION: The enzyme that unwinds the double helix of DNA in preparation for DNA replication is called
How many molecules of glucose are needed to produce one molecule of palmitate (C16H32Oz) assuming all of the carbons in each of the acetyl-CoA molecules used in formation of palmitate originate from glucose via the glycolytic pathway?
4 molecules of glucose are required to produce one molecule of palmitate assuming that all the carbons in each of the acetyl-CoA molecules used in formation of palmitate originate from glucose.
Palmitate is the esterified palmitic acid. It is one of the most common saturated fatty acid found in the living organisms. It is essential for forming cell membrane, modifying proteins, etc. It is a 16 carbon chain molecule.
Acetyl Co-A is also called the Acetyl Coenzyme A. It is synthesized by the mitochondria of the cells. It forms an essential bridging compound to mediate the conversion of pyruvic acid formed from glycolysis into citrate so that the Krebs cycle can be performed.
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an e. coli strain (f- lacz- met bio ) is mixed with e. coli cells that are lacz met- bio- and carry an f' episome with the lacz gene.
When under sustained, strong pressure, E. coli K12 mutants with fl-galactosidase gene deletions (lacZ) can regain their capacity to hydrolyze fl-galactosides.
Which strain of E. coli is most prevalent?Humans who are exposed to the E. coli strain known as O157:H7 develop a serious intestinal infection. The majority of people get sick from this strain.
How many different strains of E. coli exist?E. coli has been divided into more than 700 different serotypes. Some strains of E. coli can cause severe abdominal cramps, bloody diarrhea, and vomiting, but the majority of varieties are harmless or only cause mild diarrhea.
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During respiration members of the aniaml kingdom use __ and then realease ___ as a waste gas
Answer:
oxygen, carbon dioxide
Explanation:
I think this is just cellular respiration.
C6H12O6 + 6O2 → 6CO2 + 6H2O
the various toxins produced by s. aureus are invasive factors that allow the bacteria to spread, thereby avoiding host defenses.
The statement 'the various toxins produced by s. aureus are invasive factors that allow the bacteria to spread, thereby avoiding host defenses' is false.
In the field of science, toxins can be described as such compounds that are secreted by a microorganism in order to kill other organisms nd to spread its growth.
Toxins that are produced by S.aureus are made in order for the bacteria to spread itself rather than as a toxic agent for other organisms. As no toxicity is produced, the host would not act as a defense against A.aureus and it would be able to spread itself easily. Such a defensive mechanism promotes the growth of an organism.
The question can correctly be written as:
The various toxins produced by s. aureus are invasive factors that allow the bacteria to spread, thereby avoiding host defenses. true or false
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in tomato plants, leaf color is an inherited trait. some tomato plants have solid green leaves, while others have green leaves with patches of yellow or white, known as variegated leaves. one cause of variegated leaves in tomato plants is a gene mutation found on the chloroplast dna.which of the following pedigrees represents a likely pattern of inheritance for the mutation described above?
The given pedigree represents the pattern of inheritance for the mutation.
What is mutation?A mutation is a change to an organism's DNA sequence. Errors in DNA replication during cell division, exposure to mutagens, or viral infection can all cause mutations. Mistakes in cell division can result in mutations, as can exposure to environmental DNA-damaging substances.
The pedigree shown here represents the mutation's inheritance pattern. The chloroplasts are crucial cellular components that take part in photosynthesis and give plants their green color. Inheritance of the chloroplast comes from a single parent (uniparental inheritance). This is also referred to as cytoplasmic or maternal inheritance.
The genes from organelles like chloroplasts are inherited from the mother in this pattern of inheritance. because the cytoplasm of the zygote is contributed by the egg. The female parent is responsible for the leaf variegation. If the female parent carries the organellar gene mutation in cytoplasmic inheritance, all of the offspring will also carry the mutation.
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Describe all of the various connections and relationships between brightness loudness, pitch, amplitude, frequency, color, and energy of waves
A sound's pitch and frequency are related, and a wave's wavelength and frequency are related. The pitch increases with frequency (shorter wavelength). A sound wave's amplitude affects how loud it is. A louder sound is produced by a greater amplitude.
Brightness, often known as color intensity, is determined by the wave's amplitude, or the separation between its midway and peak. The intensity and brightness of the color increase with waveform amplitude.
Frequency of Color
They are red, orange, yellow, green, blue, indigo, and violet, in descending order of frequency. They are arranged in reverse order by wavelength because of the inverse relationship. Violet is the hue that occurs most frequently.
The energy and wavelengths of different colors of light vary. Differences in wavelength and energy are perceived as variations in color by human eyes. Compared to light nearer the violet end of the spectrum, light toward the red end of the spectrum has longer wavelengths and less energy.
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A wave's wavelength and frequency are connected, much as the pitch of a sound is. The distance between the wave's midpoint and peak, often referred to as the wave's amplitude, determines brightness, also known as color intensity.
How does all the given quantities are related?Relation between loudness, pitch, frequency and amplitude-
The frequency of a sound is related to the wavelength of a wave, which is related to the pitch of a sound. The pitch increases as frequency (or shorter wavelength) increases. The amplitude of a sound wave affects how loud it is. A louder sound is produced when the amplitude is larger.
Relationship between brightness and amplitude-
Brightness, often known as color intensity, is determined by the wave's amplitude, or the separation between its midway and peak. The intensity and brightness of the color increase with waveform amplitude.
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Briefly explain how the electron transport chain uses the energy that was originally in glucose to generate ATP. Be sure to describe the role of NADH, FADH2, oxygen, H+ ion gradient, and ATP synthase. Use the keyword chemiosmosis in your description.
ETC uses the ATP from glucose to create a H⁺ ion gradient across the membrane. This is a coupled process mediated due to transport of electrons across the electrons transporters made up of cofactors like NADH, FADH₂, etc. This gradient causes the flow of protons down their concentration gradient a process called chemiosmosis. The oxygen atom acts as the final electron acceptor and ATP synthesis is mediated by using the enzyme ATP synthase.
ATP is the abbreviation for Adenosine Triphosphate. It is the energy constituent for majority of the living organisms. The energy is released due to the hydrolysis of ATP into phosphate and ADP.
Glucose is the carbohydrate that provides instant energy to the body be breaking down to release energy.
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1. When does the fossil record begin? Why is that significant?
2. What are some of the ways that fossils are formed?
3. What is Ardipithecus ramidus? Why is “Ardi" important?
4. What happened to the Neanderthals?
5. What are some interesting features of "Otzi the Iceman"?
In Yellowstone National Park, grizzly bears and wolves are both top predators in the ecosystem. Grizzly bears eat plants as well as fish, elk, and bison. Wolves only eat meat and will hunt in packs to kill moose, elk, and other deer. How would you classify the relationship between bears and wolves?
Wolves facilitate hunting opportunities for bears, but bears modify the predatory behavior of wolves in several ways, making them primarily hostile to wolves. So the relationship between bears and wolves is of competition.
Describe interference and exploitative competition among apex predators?Competition is a fundamental ecological concept that drives everything from long-term evolutionary processes and large-scale community structures to real-time individual behavior.
Brown bears (Ursus arctos) and gray wolves (Canis lupus) are the two most widespread apex predators in the northern hemisphere (Ordiz, Krofel, et al., 2020). Recent studies have shown that sympathizing with bears reduces wolf kill rates (i.e., increases the time between kills) (Tallian, Ordiz, et al., 2017). However, the mechanisms that cause changes in wolf predatory dynamics remain. Unknown if bears are present. Existence. Here we use GPS-derived migration and predation data of wolves and data describing the presence of brown bears from two long-term research projects in Europe (Scandinavia) and North America (Yellowstone National Park, USA). and the role of intervention and exploitative competition with brown bears on the predatory behavior of wolves.
We assessed how the presence of bears affected foraging and processing times in wolves during two seasons with different potential interspecies interactions.
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The diagram below shows a cross section of land. Numbers show four different zones
Zone 3 is known as saturated zone.
What is a cross section of land?Cross-sections are shown on maps by lines that are frequently labeled A at one end and B at the other. You would be able to observe what is going on underneath the surface if you cut through the map along this line and then turned around.A geological cross-section is a visual representation of the point where two vertical planes with different orientations intersect in the subsurface.Essentially, there are three zones of subsurface water: the soil water zone, also known as the vadose zone, the intermediate zone, also known as the capillary fringe, and the ground water zone, also known as the saturated zone.To learn more about saturated zone refer,
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Brown spotting of the teeth in humans is caused by a dominant X-linked gene. If a man with normal teeth marries a woman with brown teeth who had a father with normal teeth, then _______ of their daughters will have brown teeth
A 100% B. 60% C. 25% D. 0%
50% of the daughters will have brown teeth.
What is dominant X-linked gene ?A genetic condition or trait can be passed down from parent to child through gene mutations (changes) on a single X chromosome through a process known as X-linked dominant inheritance. The condition can only be brought on in females (who have two X chromosomes) by a gene mutation on one of the X chromosomes.
Sons of fathers cannot inherit X-linked recessive diseases. The likelihood of a genetic condition developing increases when a son inherits a mother who has a mutated gene on the X chromosome. Males are more frequently affected by X-linked recessive conditions.
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The CRD of a selectin protein was initially extending into the ____________ as it was transported in a vesicle on its way to its final destination.
When a selectin protein was being carried in a vesicle to its destination, its CRD was initially extending into the post-translational stage.
What does the protein selectin do?Inflammation, lymphocyte homing, immune responses, and the homing of bone marrow stem cells are all physiologically dependent on selectins. Atherosclerosis, ischemia-reperfusion injury, inflammatory conditions, and the metastatic development of some tumors are all caused by them.
Selectin is a type of protein.Selectins are transmembrane proteins that bind carbohydrates and are found on platelets, leukocytes, and endothelial cells (E- and P-selectins). In a variety of clinical circumstances, their function is to mediate the initial steps of the recruitment of leukocytes from the blood stream.
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CRISPR sections of DNA can be marked with graphene to identify physical characteristics.
O True
O False
CRISPR sections of DNA can be marked with graphene to identify physical characteristics. TRUE.
what is CRISPR ?
CRISPR can be said to be a unique technology which is a powerful tool for editing genomes which enables geneticists and a lot of medical researchers to edit parts of the genome (gene).
what is graphene ?
Graphene is extracted from graphite, and also an allotrope of carbon consisting of a single layer of atoms arranged in a two-dimensional honeycomb lattice nanostructure which are crystalline carbon.
What are the uses of graphene?
some of the uses of graphene are:
Transport, medicine, electronics, energy, defence, and desalination.CRISPR can also be used in detection of disease-associated nucleic acids.
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transacetylase inducer
lacZ lacY
lacA
lac promoter}
lac operator
β-galactosidase
lacI gene
permease
lacI repressor
lac promotor
allolalactose
1. The {____} gene encodes the enzyme {____}, which hydrolyzes the disaccharide lactose into two monosaccharides: glucose and galactose.
2. The {____} gene encodes the enzyme {_____}, a membrane transport protein that facilitates the movement of lactose into the cell.
3. The {___} gene encodes {___}, an enzyme that detoxifies other molecules that might enter the cell through permease.
4. RNA polymerase binds to the {__} in order to transcribe the three lac genes.
5. The {__} controls whether or not RNA polymerase can transcribe the genes.
6. The {___}, which lies just upstream from the lac operon, encodes the {____} protein that binds to the operator to regulate the activity of the operon.
The lac y gene encodes the enzyme galactose which hydrolyzes the disaccharide lactose into two monosaccharides: glucose and galactose from the above option.
The lacY gene encodes a permease that features as a membrane-spanning shipping protein to deliver lactose into the cell, and the lacA gene encodes a transacetylase enzyme that transfers an acetyl organization from acetyl CoA to beta-galactosidase.
β-Galactosidase (lacZ) has bifunctional activity. It hydrolyzes lactose to galactose and glucose and catalyzes the intramolecular isomerization of lactose to allolactose, the lac operon inducerThe gene encodes the enzyme , which hydrolyzes the disaccharide lactose into monosaccharides: glucose and galactose.
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Evolution happens over a very short period of time.
Answer:
false
Explanation:
evolution happens over billions of years like how we didint become man from monkeys within a year
decidualisation and placentation defects are a major cause of age-related reproductive decline. nature communications 2017;8:352.
Decidualisation and placentation defects are two key processes in successful pregnancies.
Decidualisation is the process by which the uterus prepares for pregnancy, and placentation is the development of a functional placenta. Both of these processes are required for a successful pregnancy, and any defects in either process can lead to an unsuccessful pregnancy. The age-related reproductive decline is a major health issue, and decidualization and placentation defects are believed to be contributing factors.
A study published in Nature Communications in 2017 found that age-related reproductive decline was associated with an increased risk of decidualization and placentation defects. This suggests that the earlier a woman gets pregnant, the better her chances of having a successful pregnancy, as older women are more likely to experience defects in these processes.
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What is described as the ability of an
organism to survive and reproduce in it
environment?
A. survival
B. adaptation
C. fitness this is answer
D. evolution
Answer:
B-Adaption
Explanation:
Describe the benefits to using tissue cultures to
study medications used for treating cancer cells.
DONE
Medications can be tested on the cancer culture before being injected into the patient.
The study of cancer relies a great deal on the use of cell cultures. Growing cancer cells in the laboratory is a good way to learn about not only the properties of a particular type of cancer but also what medicines can be used and if they even work to kill the cells.
Medications can have dangerous side effects and may or may not be effective in killing or halting the growth of cancer cells. This is why culturing cells in the laboratory and using these cultures to test potential medicine is so important.
Tissue culture is a procedure in which living cells from the tissue are placed in an artificial medium and put in conditions that will enable the cells to carry on growing.
The culture may consist of one or more cells or even an entire organ. The nutrients and correct growth conditions should ensure that they survive and are able to undergo division to form more cells.
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Which of the following would be a possible amino acid sequence for an oligopeptide given the experimental data below. Give your answer in 3 letter format. 1. The amino acid composition is found to be [gly, phe, leu, arg, thr and met and some decomposition products] 2. The peptide has a molecular weight around 700 Da and absorbs at 280 nm. 3. Treatment with carboxypeptidase results in phenylalanine and a peptide. 4. First cycle Edmond Degradation yields PTHthreonine 5. CNBR treatment yields two tripeptides. 6. Trypsin digestion produces a dipeptide and a tetrapeptide with met on the amino end. 7. Chymotrypsin digestion yields tetrapeptide and a dipeptide.
A. trp-lys-met-cys-met-ala B. lys-met-cys-phe-ala-trp C. trp-ala-phe-cys-met-lys D. lys-ala-cys-phe-met-trp E. lys-met-cys-ala-phe-trp
What exactly is indeed an amino acid sequence?Pay attention to the pronunciation. the organization of amino acids in a protein.Twenty different types of amino acids can be used to create proteins, and the types of amino acids used to create each protein and how they are ordered affect the structure and function of each protein.
How should the sequence of amino acids be written?A one or three character code can be used to represent amino acid sequences.The precise formatting of sequences varies depending on the application; by convention, single-letter codes always are capitalized.
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Solutes, regardless of size, are able to move freely between compartments because water carries them along the osmotic gradients. A. TrueB. False
Solutes of all sizes can travel freely across compartments because water transports them via osmotic gradients is False , Size limits ability to diffuse.
The hypothalamus is home to the brain's thirst center. Endocrine disorders such as diabetes mellitus or diabetes insipidus can induce dehydration.
The force produced by a fluid against a wall, known as hydrostatic pressure, causes fluid to travel between compartments. The hydrostatic pressure of blood is the pressure produced by blood on the walls of blood vessels as a result of the heart's pumping action.
Water moves across cell membranes via diffusion and osmosis. The overall solute concentrations and the permeabilities of the solutes relative to water define the effective osmolality of a biological fluid.
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the root tip cells of an onion plant have 8 pairs of chromosomes. which of the following correctly describes the number of chromosomes in an onion root tip cell at a specific stage of the cell cycle?
Each of the cells in the onion root tip has 16 chromosomes.
At the S phase, how many chromosomes will the onion root tip cell have?
There are 16 chromosomes in each onion root tip cell, which is a given. As a result, the cell will contain 16 chromosomes in G1, after S, and after the M phases. Moreover, if the DNA content is 2C following the M phase.
How many genes are there on chromosome 8?700 genes Genetic research is currently focused on discovering the genes present on each chromosome. The estimated number of genes varies because scientists employ several strategies to determine the number of genes on each chromosome. There are around 700 genes on chromosome 8 that give instructions on how to make proteins.
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predict the effects on plants if the red sky phenomenon occurs for a long period and give the reason why
Answer:
some plants may turn to the red colour
Explanation:
this is because the chlorophyll gets adopted to the red environment
What would be a reasonable outcome following the complete disappearance of wolves? Gray wolf Red fox Pronghorn Coyote Vole Snowshoe hare Grass, willow, berries O a Coyotes may increase because one of their primary predators is gone ob Coyotes may decline because they eat wolves c. Voles may decline as coyotes become less abundant O d. Grass, willow, and berries will increase as more elk become available
Option d, Grass, willow, and berries will increase as more elk become available. In the above given diagram of a food web the reasonable outcome following the complete disappearance of the wolves.
Elk are grazing mammals, thus grasses and certain trees would suffer a rise in population. Similar to wolves elk populations will grow, so would elk's predator populations. Elk-hunting and elk-eating predator populations would have a greater food source. An increase in a food supply increases the amount of food available to the entire population, allowing disappearance of wolves to live and procreate. Grass , willow and berries will increase
The complete question is:
What would be a reasonable outcome following the complete disappearance of wolves?
a ) Coyotes may increase because one of their primary predators is gone b ) Coyotes may decline because they eat wolves.
c ) wolves may decline as wolves become less abundant
d ) Grass, willow, and berries will increase as more elk become available.
reference image is provided below.
As more elk become available.
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Mutation of the muscle-specific intermediate filament desmin leads to the rare disease desmin-related myopathy. This disorder starts with weakness of the lower limbs when patients are in their 20s or 30s. As symptoms worsen, weakness in respiratory and cardiac muscles occurs, which can lead to serious problems including sudden cardiac arrest.
Which of the following mutations would disrupt desmin intermediate filament structure or function and could explain the symptoms of desmin-related myopathy? Choose all of the possible mutations.
mutations would disrupt desmin intermediate filament structure or function. the symptoms of desmin-related myopathy are:
(A) Mutation such that formation of dimers is blocked.
(B) Alteration in the twist or coiling of the dimers, blocking formation of staggered tetramers.
(C) Disruption of the polarity of the final desmin strands.
Desmin is an intermediate muscle-specific filament protein. Intermediate filament protein of great importance in smooth, skeletal and cardiac muscle.
Desmin-associated myopathy is a disease in which desmin is mutated. The effect of this mutation on desmin causes muscle weakness in both the lower and upper extremities, respiratory failure (breathing problems), weakness of the heart and skeletal muscles, and irregular heartbeats that can lead to heart attacks. There is a possibility.
Mutations that may lead to this desmin-associated myopathy include:
Mutation such that formation of dimers is blocked.Alteration in the twist or coiling of the dimers, blocking formation of staggered tetramers.Disruption of the polarity of the final desmin strands.your question is incomplete, but most probably the full question was
Mutation of the muscle-specific intermediate filament desmin leads to the rare disease desmin-related myopathy. This disorder starts with weakness of the lower limbs when patients are in their 20s or 30s. As symptoms worsen, weakness in respiratory and cardiac muscles occurs, which can lead to serious problems including sudden cardiac arrest. Which of the following mutations would disrupt desmin intermediate filament structure or function and could explain the symptoms of desmin-related myopathy? Choose all of the possible mutations.
(A) Mutation such that formation of dimers is blocked.
(B) Alteration in the twist or coiling of the dimers, blocking formation of staggered tetramers.
(C) Disruption of the polarity of the final desmin strands.
(D) Alteration in head groups, so tetramers are unable to link end to end.
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Need help due tomorrow
Independent variable: Time
Dependent variable: Temperature of water in thermos
Best thermos: Bottle A, because it kept the water hot for the longest amount of time, had a very slow temperature decline over the time period whereas other thermos water temperatures dropped alot.
Least Effective Thermos: Bottle D, lots temperature the quickest at the fastest rate, lost the most heat over the entire time of the experiment between the 4 thermos tested.
When are chromosomes duplicated --- before or during mitosis?
Answer:
Before Mitosis
Explanation:
The chromosomes are duplicated during interphase, which occurs right before it enters into mitosis.
-Happy Holidays & Hope this helped.
Hunter has been completing research for his environmental science class. During the course of his studies, Hunter reviewed some of the requirements for becoming an
occupational health and safety specialist. He was very interested to learn about the educational requirements as well as the projected job growth in his area.
Hunter has been studying biology and will graduate in May with his bachelor's degree. He plans on searching for a job within the local, state, or federal government
after graduation. Because of Hunter's anticipated degree completion, he will be eligible for graduate safety practitioner (GSP) designation. GSP designation is one
pathway to sit for the certified safety professional exam.
The following questions relate to occupational health and environmental science. Please help Hunter answer them based on what you have learned from this chapter.
Hunter's best chance of employment with the government is based on the fact that of specialists work for a government agency.
OA, 70%
B. 60%
OC. 45%
OD.30%
Answer:
It is not possible for me to accurately answer this question without further information about the specific job market for occupational health and safety specialists in Hunter's area. The percentage of specialists who work for a government agency may vary based on the location and the specific job market.
Explanation:
To increase his chances of finding employment in this field, Hunter may want to consider researching the job market in his area and identifying the agencies or organizations that are most likely to hire occupational health and safety specialists. He may also want to consider networking with professionals in the field and gaining relevant experience through internships or part-time positions.
I hope this information is helpful. If you have any other questions, please don't hesitate to ask.
which of the following is a strategy of renewal that ensures that there will always be stem cells to produce mature blood cells?
The strategy of renewal ensures that there will be stem cells to produce mature blood cells is when stem cells divide into two daughter cells, one of the daughter cells remains a stem cell.
All specialized cells in the body form stem cells. The stem cells in the body of a person mature to form different kinds of cells in the body of a person.
As we know, stem cells will divide by mitosis. One of the stem cells will divide into a specialized cell whereas the other cell will remain a stem cell.
This strategy si used in order for renewal of stem cells in order for one type of stem cell to mature into a specialized cell. By this renewal method, blood cells will also be produced.
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Both internal and external factors may influence the process of aging. Variable-rate theories include all of the following factors EXCEPT
Variable-rate theories include all of the following factors except metabolism
What is metabolism ?
The alterations in a cell's or an organism's internal chemistry. These modifications produce the energy and raw materials that support cell growth, reproduction, and organism health. Getting rid of harmful substances is assisted by metabolism.
Metabolism can be divided into two types: catabolism and anabolism. In contrast to anabolism, which uses energy to build cell building blocks like proteins and nucleic acids, catabolism is the breakdown of organic matter.
These are the metabolism steps:
Stage 1: Catabolism of amino acids or glucose metabolism for fatty acids. Cycle of Citric Acid,
Stage 2 Electron Transport Chain
and ATP synthesis at stage 3.
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Which of the following describes a consequence of fossil fuel consumption?
decrease in atmospheric carbon
increase in atmospheric carbon
increase in atmospheric oxygen
decrease in atmospheric oxygen
The statement decrease in atmospheric oxygen describes a consequence of fossil fuel consumption (Option D).
Why does fossil fuel consumption decrease oxygen air level?Fossil fuel consumption decreases oxygen air levels due to the process of combustion of these natural resources, which lead also to the increase of the amount of carbon dioxide in the atmosphere, and thus it has been associated with global warming (carbon dioxide is a greenhouse gas).
Therefore, with this data, we can see that fossil fuel consumption decrease oxygen air level due to the process of combustion.
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