how is dna stored in eukaryotic cells? select the two answers that are correct. dna is a circular molecule that is free-floating in the cytoplasm of the cell. dna is stored as chromosomes consisting of a single dna molecule and no protein molecules. dna is a linear molecule wrapped around proteins and condensed into chromosomes. dna is sequestered in the nucleus apart from the metabolic activity of the cytoplasm. dna is stored as multiple double-stranded molecules formed into chromosomes.
Answers
DNA in eukaryotic cells is stored as follows:
DNA is a linear molecule wrapped around proteins and condensed into chromosomes.DNA is stored as multiple double-stranded molecules formed into chromosomes.How is DNA stored in eukaryotic cells?
In eukaryotic cells, DNA is stored in the nucleus, which is a membrane-bound organelle that houses the genetic material of the cell. The DNA in the nucleus is organized into structures called chromosomes.
Each chromosome consists of a long, linear molecule of DNA that is wrapped around proteins called histones. The combination of DNA and histones is called chromatin. The histones help to package and organize the DNA, and they also play a role in regulating gene expression.
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Related Questions
Both chimeric antigen receptors and BiTEs function to bring cytotoxic T cells into close proximity to cells bearing a target antigen in order to kill the target cell. What is one advantage of using BiTEs over CAR T cells?
CAR T cells lock directly onto the tumor cells using a receptor on their surfaces while BiTEs rely on an intermediate molecule, reducing the chance of attacking normal tissue cells. BiTEs can be designed to target many different types of antigen, while CAR T cells can only target a limited number of types of antigen. CAR T cells last a long time in the body so the effect lasts long after the initial injection without needing additional treatment. BiTEs do not last very long in the body so the treatment can be dosed to limit adverse effects
Answers
Option 2 is Correct. One benefit of employing BiTEs over CAR T cells is that they can be programmed to target a wide variety of antigens, as opposed to CAR T cells, which can only target a small variety of antigens.
By bringing cytotoxic T cells into close contact with cells expressing a target antigen, chimeric antigen receptors and BiTEs both work to destroy the target cell. The use of CAR (chimeric antigen receptor) T cells is one of the key ACT strategies.
By allowing T cells to bind target cell surface antigens via a single-chain variable fragment (scFv) recognition domain, CAR T cells facilitate MHC-unrestricted tumour cell killing. a particular class of immune cell that is capable of eliminating specific types of cells, such as virus-infected cells, cancer cells, and alien cells.
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Correct Question:
Both chimeric antigen receptors and BiTEs function to bring cytotoxic T cells into close proximity to cells bearing a target antigen in order to kill the target cell. What is one advantage of using BiTEs over CAR T cells?
1. CAR T cells lock directly onto the tumor cells using a receptor on their surfaces while BiTEs rely on an intermediate molecule, reducing the chance of attacking normal tissue cells.
2. BiTEs can be designed to target many different types of antigen, while CAR T cells can only target a limited number of types of antigen.
3. CAR T cells last a long time in the body so the effect lasts long after the initial injection without needing additional treatment.
4. BiTEs do not last very long in the body so the treatment can be dosed to limit adverse effects.
State whether each of the following scenarios relates to osmotic diarrhea, secretory diarrhea, or altered motility:
Shigella dysentery
A. Osmotic diarrhea
B. Secretory diarrhea
C. Altered motility
B. Secretory diarrhea
Answers
Secretory diarrhea is a type of diarrhea that is characterized by an increase in the secretion of fluids and electrolytes into the small intestine, leading to frequent, watery stools.
One of the most common causes of secretory diarrhea is Shigella dysentery, a bacterial infection that is spread through contaminated food, water, and poor hygiene. Symptoms of Shigella dysentery include abdominal pain, fever, and watery diarrhea.
In some cases, the diarrhea can contain blood and mucus. The infection is treated with antibiotics, and in severe cases, additional supportive treatment may be necessary. Prevention of Shigella dysentery includes good hygiene, proper handwashing, and avoiding consumption of contaminated food and water.
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Assume population b and population c evolve until they reach adaptive peaks and experience stabilizing selection. Both populations have the same mutation rate. Which population will have less variability in size?.
Answers
That population will have less variability in size which has slower rate of mutation or has experience less mutation.
What is mutation?A mutation refers to a change in a DNA sequence of an organism. Mutations can result from DNA copying mistakes that is made during cell division, exposure to radiation or chemicals which is called mutagens, or infection caused by viruses.
If mutation occurs slowly or not completed, it will leads to less variability in size so we can conclude that the population will have less variability in size has experience less mutation.
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Your lab has just discovered a molecule believed to be a new neurotransmitter. The challenge is now to prove that it fits the 3 necessary criteria to be classified as a neurotransmitter. a. Describe an experiment you can do to prove that the molecule is synthesized and stored in the presynaptic neuron. b. Describe an experiment you can do to prove that the molecule is released by the presynaptio axon terminal upon stimulation. c. Describe an experiment you can do to prove that the molecule produces a response on the postsynaptic cell that mimics its response by natural release via the pre-synaptic neuron.
Answers
The three experiments to prove the molecule is a neurotransmitter: Synthesis and storage, release by presynaptic axon terminal, and production of the same response on the postsynaptic cell as natural release.
The experiments described here will allow the scientists to prove that the molecule found is a neurotransmitter. The three experiments they can do to confirm their hypothesis are the following:
a. To prove the molecule is synthesized and stored in the presynaptic neuron, an experiment could be done where the presynaptic neuron is isolated and the molecule detected within it. They can do this by labeling the molecule and then using a microelectrode to isolate the presynaptic neuron. If the molecule is found within it, this would prove the first criterion.
b. To prove that the molecule is released by the presynaptic axon terminal upon stimulation, an experiment can be done where the presynaptic neuron is stimulated, and the released molecules detected. They can do this using a radio-labeled molecule and detect it using radioligand binding. If the molecule is found released, this would prove the second criterion.
c. To prove that the molecule produces a response on the postsynaptic cell that mimics its response by natural release via the pre-synaptic neuron, an experiment could be done where the postsynaptic neuron is isolated and then stimulated with the radio-labeled molecule. If the same response is produced as with natural release, this would prove the third criterion.
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A Before prophase II begins, does the DNA in the cell duplicate itself?___________
B. During metaphase II, do homologous chromosomes pair up as in metaphase I?__________
C. How does anaphase II differ from anaphase I?_________
D. At the end of anaphase II , how many chromatids are on each side of the cell ?___
E. After cytokinesis , how many cells have been formed from the parent cell ?_______
F. Are all of the cells the same size ? _______
Answers
Answer:
for F no
Explanation:
no cells are the same because all people ate different and can not be precisely the same as cells.
Meiosis can result in the formation of
O 4 sperm cells
O 1 healthy egg cell and 3 polar bodies
gametes
O all of these can be produced by Meiosis
Answers
Answer:
it's in the explanation
Explanation:
meiosis produces haploid gametes (ova or sperm) that contain one set of 23 chromosomes. when two gametes (an egg and a sperm) fuse, the resulting zygote is once again diploid, with the mother and father each contributing 23 chromosomes
The less fat in the body, the more blood there is per unit of body weight
True or false
Answers
The less fat in the body, the more blood there is per unit of body weight. This statement is true.
The amount of blood in the body is proportional to the body weight, and the less fat there is in the body, the more blood there is per unit of body weight. This is because fat tissue contains very little blood, while other tissues such as muscle and organs have a much higher blood supply. Therefore, as the percentage of body fat decreases, the relative amount of blood in the body increases. However, it's important to note that overall blood volume can still vary based on factors such as hydration status, medical conditions, and medications.
Our body has a fixed amount of blood, which circulates through the heart, arteries, veins, and capillaries to provide oxygen and nutrients to all cells and tissues. The amount of blood in the body is proportional to the body weight. However, the distribution of blood varies in different tissues based on their blood supply.
Fat tissue has very little blood supply compared to other tissues such as muscle and organs. Therefore, a higher percentage of body fat means a relatively lower amount of blood in the body. Conversely, a lower percentage of body fat means a relatively higher amount of blood per unit of body weight.
It's worth noting that overall blood volume can still vary based on factors such as hydration status, medical conditions, and medications. For example, dehydration can cause a decrease in blood volume, while conditions such as heart failure or liver disease can cause an increase in blood volume. Overall, maintaining a healthy body composition with an appropriate amount of body fat can help ensure a healthy blood volume and circulation.
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The clinic nurse develops a plan of care for a client with emphysema who will be started on long-term corticosteroid therapy. which specific instruction should the nurse include in the plan of care?
Answers
The clinic nurse creates a plan of care for a client with emphysema who will be constructed on long-term corticosteroid therapy. Advise the client to return to the clinic for monitoring of blood glucose levels. This specific instruction should the nurse include in the method of care.
What is corticosteroid therapy?Corticosteroids (medications that resemble cortisone) are used to treat inflamed body regions. They decrease allergic reactions' itching, swelling, and other side effects. They are frequently used in the treatment of a variety of illnesses, including severe allergies or skin conditions, asthma, or arthritis. Oral medications (taken by mouth), drugs administered intravenously (IV), and medications administered intramuscularly (IM) are all examples of systemic steroid therapy (intramuscularly). Systemic steroids travel throughout the bloodstream to different parts of the body.
The term "glycaemia," also referred to as "blood sugar level," "blood sugar concentration," or "blood glucose level," refers to the concentration of glucose in the blood of people or other animals. A 70 kg person's blood contains 4 grammes or less of the simple sugar glucose at all times.
Hence, The clinic nurse creates a plan of care for a client with emphysema who will be constructed on long-term corticosteroid therapy. Advise the client to return to the clinic for monitoring of blood glucose levels. This specific instruction should the nurse include in the method of care.
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Suppose an organism normally has 24 chromosomes. If a cell in this organism divides by mitosis, how many chromosomes should each daughter cell have after cell division occurs? Explain your answer.
Answers
Answer:
24 chromosomes. If a cell in this organism divides by mitosis, how many chromosomes should each daughter cell have after cell division occurs? Explain your answer.
Restriction enzymes Group of answer choices stop transcription and translation. facilitate nucleotide base pairing. bind together strands of DNA. cut DNA at specific sites.
Answers
Restriction enzymes are proteins that have the ability to cut DNA at specific sites. The correct answer is option (C)
They are primarily found in bacteria and are used as a defense mechanism against foreign DNA, such as viral DNA. These enzymes recognize specific DNA sequences, known as recognition sites or restriction sites, and cleave the DNA at or near these sites.
The cleavage of DNA by restriction enzymes is important in various molecular biology techniques, such as DNA cloning and genetic engineering. By cutting DNA at specific sites, restriction enzymes allow scientists to manipulate and study DNA in the laboratory. This includes inserting genes into plasmids, generating DNA fragments for analysis, and creating recombinant DNA molecules.
It is important to note that restriction enzymes do not stop transcription and translation, facilitate nucleotide base pairing, or bind together strands of DNA. Their primary function is to cleave DNA at specific sites, providing a powerful tool for genetic manipulation and research.
In summary, restriction enzymes are proteins that cut DNA at specific sites. They play a crucial role in genetic engineering and molecular biology techniques, allowing scientists to manipulate DNA and study gene function.
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The field of biology that studies the diversity of organisms and
their evolutionary relationships is called systematics.
Select one:
True
False
.......................................................
Answers
Answer:
True.
Explanation:
Hope this helps!
the mac complex lyses a pathogen by poking holes in the cell wall. group of answer choices true false
Answers
The statement "the MAC complex lyses a pathogen by poking holes in the cell wall" is true.
The complement system of the immune system includes the membrane attack complex (MAC). It is created when the complement system sets off a chain of events that results in the creation of a pore-like structure in the cell membrane of pathogens. This structure causes the integrity of the cell membrane to be compromised, leading to cell lysis and pathogen death. The complement proteins C5b, C6, C7, C8, and numerous copies of C9 make up the MAC complex, which comes together to produce a hole in the target cell membrane. By directly destroying the cell walls or membranes of infections, the immune system is able to eliminate them.
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How does hibernation help animals survive?
Responses
a.Hibernation increases the chances of meeting a mate.
b.Hibernation reduces the energy required for survival.
c.Hibernation protects the animal young from predators.
d.Hibernation makes access to food easier.
Answers
Answer:
I think the answer is B, hibernation reduces the energy required for survival
What organs are involved in the excretory system?
Answers
Answer:
skin, liver, large intestine, lungs, and kidneys
Explanation:
Answer:
Excretory Organs. Organs of excretion include the skin, liver, large intestine, lungs, and kidneys (see the figure below). Together, these organs make up the excretory system. They all excrete wastes, but they don't work together in the same way that organs do in most other body systems.
This type of endocytosis is the cellular process of engulfing liquid particles by the cell membrane.
Answers
The type of endocytosis is the cellular process of engulfing liquid particles by the cell membrane is called pinocytosis
Pinocytosis refers to how living cells consume liquid droplets. Pinocytosis is a type of endocytosis, which is the method by which cells envelop external substances and collect them in special membrane-bound vesicles inside the cell. Pinocytosis occurs when a droplet of the liquid becomes bound, or reabsorbed, on the cell membrane. It then invaginates (creates a pocket) and pinches off to create a vesicle in the cytoplasm instead of a single droplet of liquid traveling inactively through the cell membrane.
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Without a cork cambium, a sugar maple tree would…
(A) absorb smaller quantities of water and dissolve substances.
(B) be infested with fungi and insects eating away at its wood.
(C) fall over as its roots rotted and decayed beneath the soil.
(D) lose its leaves during summer months instead of autumn.
Answers
Answer:
(B) be infested with fungi and insects eating away at its wood.
Explanation:
quizlet biology 3 botany
chatgpt
prevents water loss too
its like a coat
its used for wine bottles
Therefore, the most likely scenario is (B) - the tree would be infested with fungi and insects eating away at its wood.
Charlie had some tests done recently to assess his risk for certain diseases. The results showed that he has a
waist circumference of 47 inches, a BMI of 29, and a normal skin fold measurement test. What should Charlie
do?
a A. Charlie is a little too thin, he is most likely underweight, and he needs to consult a dietician or
doctor to help him see how to modity his diet to gain some weight.
B.
Charlie should repeat the caliper test because it does not fit with the other information, and he
should start an exercise routine and diet to reduce his body fat.
C Charlie should immediately start an exercise and diet program because all his tests indicate that
he is extremely obese, which puts him at risk for several diseases.
D.
Charlie should repeat the BMI because the other tests were normal, and he should avoid
changing his body composition because he'll be too overweight.
Answers
Charlie should immediately start an exercise and diet program because all his tests indicate that he is extremely obese, which puts him at risk for several diseases. Thus, the correct option is C.
What is BMI?BMI stands for Body mass index. It is defined as the value emanating from the mass and height of a person. It is used to estimate total body fat and whether a person is a healthy weight.
The normal BMI of a person ranges from 18-24, but the BMI of Charlie is extremely above the normal value, which indicates that he is overweight and has a chance of having obese.
Thus, he is required to begin the exercise with a proper schedule and plan his regular and balanced diet.
Therefore, it is well described above.
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a complementation test is done to corroborate whether a complementation test is done to corroborate whether a mutation occurred a mutation is dominant a gene is epistatic respect to other genes involved in a particular trait two mutant organisms have their mutations in the same gene two organisms share the same allele for a particular gene
Answers
A complementation test is performed to determine if two mutant organisms with similar phenotypes have mutations in the same gene or in different genes.
If the mutations are in the same gene, they will not complement each other and the phenotype will not be restored. If the mutations are in different genes, they may complement each other and restore the wild-type phenotype.
A complementation test is a genetic experiment used to determine whether two different mutations causing similar phenotypes are located in the same gene or in different genes. It is based on the principle of complementation, which refers to the ability of two different mutant alleles to "complement" each other and restore the wild-type phenotype when present in different genes.
In the test, two mutant organisms that exhibit the same or similar phenotypic traits are crossed. If their mutations are in different genes, they may possess different mutant alleles and have a chance of complementing each other. This means that the combination of the two mutant alleles may restore the wild-type phenotype in the offspring. In this case, the mutations are said to be non-allelic and located in different genes.
On the other hand, if the mutations are in the same gene, they will not complement each other. This indicates that the two mutant alleles are non-functional forms of the same gene, and their combination does not produce a functional gene product. As a result, the offspring will still exhibit the mutant phenotype, confirming that the mutations are allelic and located in the same gene.
By performing complementation tests, researchers can gain insights into the genetic basis of a particular trait or phenotype. It helps to determine whether mutations occur in the same gene or different genes, providing valuable information about gene interactions and the underlying molecular mechanisms involved in the trait of interest.
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How is the speed of a river’s flow determined?
WILL MARK BRAINLIEST
Answers
Answer:
Factors that affect the speed of a river include the slope gradient, the roughness of the channel, and tides.
Explanation:
All correct EXCEPT: of the following statements concerning characteristics of predator-prey relationships are A. A rise in the population of prey is often followed by a rise in the population of predators. B. A rise in the population of predators is followed by a decrease in the population of prey. C. Camouflageisanadaptationthatprotectsprey. D. Theproductionoflargenumbersofoffspringwithinveryshortperiodsoftimeensures the survival of some prey populations. E. The population of predators most often eliminates the population of prey.
Answers
Answer:
are A. A rise in the population of prey is often followed by a rise in the population of predators.
energy of moving things
Answers
Answer: Kinetic energy is the energy of motion. All moving objects have kinetic energy. When an object is in motion, it changes its position by moving in a direction: up, down, forward, or backward.
Answer:Kinetic energy
Explanation:
A field that is focused on preventing death, disease, and disability by reducing exposure to adverse conditions and prom es behavioral change is called public policy. O healthy visions. biodiversity implications. environmental health.
Answers
A field that is focused on preventing death, disease, and disability by reducing exposure to adverse conditions and promoting behavioral change is called environmental health.
Environmental health refers to the practice of preventing diseases, injury, and disability by reducing exposure to adverse environmental conditions and promoting behavior change. It is a field that is focused on identifying and assessing environmental factors that can affect human health and taking action to control or eliminate those factors. The field of environmental health deals with a wide range of issues, including air quality, water quality, food safety, hazardous waste management, and the effects of climate change.
It is an interdisciplinary field that brings together experts from many different fields, including public health, environmental science, toxicology, epidemiology, and engineering. Environmental health professionals work to promote healthy environments and prevent illness and disease by developing and implementing policies and programs that reduce exposure to environmental hazards and promote healthy behavior.
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a scientist is comparing the outer structure of an onion cell, structe x, to the outer
Answers
The generalization that is true regarding the types of structures which is analyzed is that structure X (outer structure of an onion cell) and structure Y (outer structure of a human skin cell) have both examples of cellular membranes.
The Cellular membranes were present in different types of cells and promote as the outer boundaries or secured barriers of the cell. They promote the flow of fluid in and out of the cell and give a structural bar.
These membranes showed as a protector to safeguarding the major tissues and organs from external components such as pathogens, UV radiation, and water loss.
Although, these generalizations have both structure X and structure Y represent cellular membranes are true, which reflects the major role of membranes in prolonging the probity and functionality of cells in various organisms.
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Although part of your question is missing, you might be referring to this full question A scientist is comparing the outer structure of an onion cell, structure X, to the outer structure of a human skin cell, structure Y. Which generalization is true about the types of structures being examined?
What is the unknown substance? Be sure to explain how you know
Answers
Answer:
The last one
Explanation:
All other substances use their chemical name, not a generic name like the last one
Which is the central element for all living things?
-carbon
-hydrogen
-oxygen
-nitrogen
Answers
Answer:
carbon
Explanation:
I took the test and got it right.
Answer: carbon
Explanation:
What type of scientist would be the best qualified to perform genetic engineering to pro- duce seed that are more productive in agriculture? A. biochemist B. geologist C. molecular biologist D. paleontologist
Answers
The type of scientist best qualified to perform genetic engineering to produce more productive seeds in agriculture would be a molecular biologist, the correct option is C.
Molecular biologists specialize in studying the structure, function, and interactions of molecules within biological systems, including DNA and genes. Genetic engineering involves manipulating the genetic material of organisms, which requires a deep understanding of molecular biology principles.
Molecular biologists have the expertise to identify and isolate specific genes responsible for desired traits in crop plants, such as increased productivity or resistance to pests or diseases. They can then modify or introduce these genes into target plants to achieve the desired outcomes, the correct option is C.
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anyome know the answer
Answers
Answer:
4.8beads/seconds is the rate of reaction
Complete each sentence using the drop-down menus.
Desertification mainly impacts
✔ land
resources.
Point and nonpoint sources refer to types of
✔ water
pollution.
The process of people moving to cities, called
✔ urbanization
, greatly impacts land, air, and water resources.
The burning of fossil fuels can cause
✔ smog and acid rain
ALL CORRECT ANSWERS, know for a fact, trust me
Answers
Desertification is the process by which productive land becomes degraded and unable to support plant growth. Water pollution is the contamination of water bodies (such as lakes, rivers, oceans, and groundwater) by human activities.
Urbanization refers to the process by which people move from rural areas to urban areas, resulting in the growth of cities and the development of urban infrastructure.
Desertification mainly impacts land resources.Point and nonpoint sources refer to types of water pollution.The process of people moving to cities, called urbanization, greatly impacts land, air, and water resources.The burning of fossil fuels can cause smog and acid rain.Learn more about desertification, here:
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Bacteria which convert nitrogen gas into bio-available forms of nitrogen, such as ammonia and nitrate, are known as
O A. nitrogen emitting bacteria
O B. carbon emitting bacteria
C. nitrogen fixing bacteria
D. carbon fixing bacteria
Answers
Answer:
A. nitrogen emitting bacteria
what are two limitations in diffusion experiment ??
Answers
Answer:
Once an organism is beyond a certain size, it cannot get essential molecules into and out of cells solely by diffusion. Diffusion is limited by the surface area to volume ratio of the organism.
Explanation:
once an organism is beyond a certain size, it cannot get essential molecules into and out of cells solely by diffusion. diffusion is limited by the surface area to volume ratio of the organism.