Which scientific claim is most consistent with these findings?
Answers
The scientific claim most consistent with these findings is histone methylation opens up chromatin at gene R so transcription factors can bind to DNA more easily (D).
Histones аre the mаjor protein constituent of chromаtin in the eukаryotic nucleus. These proteins undergo а host of different post-trаnslаtionаl modificаtions, including phosphorylаtion, аcetylаtion, аnd methylаtion, which hаve profound effects on the remodeling of chromаtin. Histone modificаtions cаn function either individuаlly or combinаtoriаlly to govern such processes аs trаnscription, replicаtion, DNА repаir, аnd аpoptosis.
Methylаtion аnd demethylаtion of histones turns the genes in DNА "off" аnd "on,” respectively, either by loosening their tаils, thereby аllowing trаnscription fаctors аnd other proteins to аccess the DNА, or by encompаssing their tаils аround the DNА, thereby restricting аccess to the DNА.
Your question is incomplete, but most probably your full question was
Histone methyltransferases are a class of enzymes that methylate certain amino acid sequences in histone proteins. A research team found that transcription of gene R decreases when histone methyltransferase activity is inhibited. Which scientific claim is most consistent with these findings?
A. DNA methylation inhibits transcription of gene R.
B. Histone modifications of genes are usually not reversible.
C. Histone methylation condenses the chromatin at gene R so transcription factors cannot bind to DNA.
D. Histone methylation opens up chromatin at gene R so transcription factors can bind to DNA more easily.
Thus, the correct option is D.
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Related Questions
Animal Bites of Postal Workers In Cleveland, a sample of 75 mail carriers showed that 8 had been bitten by an animal during one week. In Philadelphia, in a sample of 55 mail carriers, 14 had received animal bites. Is there a significant difference in the proportions? Use a = 0.10 and use p₁ for the proportion of mail carriers in Cleveland. Find the 90% confidence interval for the difference of the two proportions and round all intermediate calculations to at least three decimal places.
Answers
The 90% confidence interval for the difference of the two proportions is CI ≈ (-0.282, -0.014)
The null hypothesis:
H0: p1 - p2 = 0
The alternative hypothesis:
Ha: p1 - p2 ≠ 0
Significance level α = 0.10
Use p₁ for the proportion of mail carriers in Cleveland. Use n1, p1, and q1 for the sample proportion, sample size, and sample proportion for Cleveland.
Similarly, use n2, p2, and q2 for the sample proportion, sample size, and sample proportion for Philadelphia.
p1 = 8/75 = 0.1067
n1 = 75
q1 = 1 - p1 = 0.8933
p2 = 14/55 = 0.2545
n2 = 55
q2 = 1 - p2 = 0.7455
Pooled proportion: P = (p1n1 + p2n2) / (n1 + n2)
P = (0.1067 × 75 + 0.2545 × 55) / (75 + 55)
= 0.1836
Standard Error of the Difference:
σd = √(P(1 - P)(1/n1 + 1/n2))
σd = √(0.1836(1 - 0.1836)(1/75 + 1/55))
≈ 0.0815
The test statistic:
z = (p1 - p2) / σd
z = (0.1067 - 0.2545) / 0.0815
≈ -1.8117
Critical values:
For a two-tailed test, using α = 0.10, we need to find zα/2 such that P(-zα/2 < Z < zα/2) = 1 - α.
Therefore, α/2 = 0.05
z0.05 = 1.645
Rejection region:
Reject H0 if z < -z0.05 or if z > z0.05
Test conclusion:
Since z = -1.8117 is between -1.645 and 1.645, we fail to reject the null hypothesis.
Hence, there is no significant difference in the proportions of mail carriers who receive animal bites in Cleveland and Philadelphia.
The 90% confidence interval for the difference of the two proportions:
CI = (p1 - p2) ± zα/2 σd
CI = (0.1067 - 0.2545) ± 1.645 × 0.0815
CI = -0.1478 ± 0.1340
CI = (-0.2818, -0.0138)
Rounding to at least three decimal places: CI ≈ (-0.282, -0.014)
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How does mitochondria help a cell get the materials it needs
Answers
Answer:
the Mitochondria helps to produce the energy necessary for the cell's survival and functioning
Explanation:
you can Remember the Mitochondria as the "Powerhouse of a cell"
1) An environmental change severely affected the organism represented by species K. What was the result
Answers
An environmental change can have various impacts on different organisms. In the case of species K, the severity of the change may have caused a significant decrease in their population size, or even extinction. However, without further information on the specifics of the environmental change and the characteristics of species K, it is difficult to provide a more detailed explanation of the result.
The result of an environmental change severely affecting the organism represented by species K would be that the species might undergo adaptations, experience a decline in population, or face the risk of extinction. The specific outcome would depend on the organism's ability to adapt to the new environmental conditions. The explanation for this result is that organisms must interact with their environment to survive, and significant environmental changes can challenge their ability to thrive in the altered conditions.
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A Cowbird lays it's eggs in other bird's
nests. As it's young hatch they fight to
survive along side the host bird's young.
This is an example of
Answers
Answer:
brood parasitism
Explanation:
Answer:
It go
Explanation:
Blood parasol I'm is the answer
4) Do all organisms eat the same food in the food web? How do you know this?
( I started with "No, not all organisms eat the same food")
Answers
No, not all organisms eat the same food in the food web, this is because there are different hierarchies is the food chain.
What is the food web?A food web is a diagram that shows what is eaten by what in an ecological community and how food chains naturally connect to one another. Consumer-resource system is another term for the food web.
Each organism in an ecosystem is a link in a number of food chains. Energy and nutrients can go along different food chains as they move through the ecosystem.
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how many inches thick should the bear's fur layer ( lfur ) be to hold a layer of air lair so that adequate insulation is provided?
Answers
Answer: 45 inches long
Explanation:
Cells of the lymphatic system secrete antigens in an attempt to neutralize and remove abnormal substances in the body, such as bacteria and viruses.
a. true
b. false.
Answers
No, it is false. Cells of the lymphatic system does not secrete antigens in an attempt to neutralize and remove abnormal substances in the body, such as bacteria and viruses.
When an abnormal substance such as a bacterium or virus is present in the body, the lymphatic system mounts a defense against the antigen, and some cells produce antibodies in response.
The Lymphatic System or Lymphoid System is an organ system in vertebrates that is part of the immune system and complements the circulatory system.
It consists of lymphatic vessels, lymph nodes, lymphatic or lymphoid organs, and a large network of lymphoid tissues. Blood vessels carry a clear fluid called lymph back to the heart for recirculation.
Unlike the circulatory system, which is a closed system, the lymphatic system is an open system. The human circulatory system processes an average of 20 litres of blood per day by capillary filtration, which removes plasma from the blood.
About 17 litres of filtered blood is reabsorbed directly into the blood vessels, leaving the remaining 3 litres in the interstitial fluid. One of the main functions of the lymphatic system is to provide an additional return path to the blood for the extra 3 litres.
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how long does it take for ancestry dna results to come back
Answers
Answer:about 6-8 weeks
Explanation: about 6-8 weeks to process from the time that the lab receives your DNA sample.
What’s the answer? Fastest gets brainliest if it works!
Answers
Answer:
b) Water
Explanation:
Cellular respiration or aerobic respiration is a series of chemical reactions which begin with the reactants of sugar in the presence of oxygen to produce carbon dioxide and water as waste products.
Which product of photosynthesis is released into the atmosphere?
Answers
Answer:
Oxygen! Oxygen is the waste product of plants and ends up in the atmosphere, which allows animals to breathe.
The human population is increasing every day. How does this increase in population affect the natural resources that maintain humans?
a) Increases the supply of resources
b) Decreases the amount of resources
c) Results in less demand for resources
d) Improves the quality of the resources
Answers
The natural resources that maintain humans results in decreases the amount of resources. The correct option is b.
What are natural resources?Natural resources are resources derived from nature and used with minimal modification. This includes commercial and industrial use, aesthetic value, scientific interest, and cultural value.
The environmental impact of so many people is manifested in two ways: consumption of resources such as land, food, water, air, fossil fuels, and minerals.
Consumption waste products include air and water pollutants, toxic materials, and greenhouse gases.
Thus, the correct option is b.
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HELP ME PLEASE I NEED HELP
Answers
Answer:
thes answer is a bacterial cell
which processes are types of post‑translational protein modification?
Answers
Post-translational modification (PTM) refers to the biochemical modifications that occur in proteins after translation, which can have a significant effect on the functional properties of proteins. There are numerous different kinds of post-translational modification, and some of the most commonly known ones include glycosylation, phosphorylation, acetylation, ubiquitination, methylation, and sumoylation.
Glycosylation is a PTM in which carbohydrates are covalently bound to proteins. This process is essential in many biological systems as it plays a role in protein stability, cell-cell recognition, and communication. Glycosylation can be classified into two types; N-linked and O-linked. N-linked glycosylation occurs when a carbohydrate molecule is attached to the amide nitrogen of an asparagine residue on a protein.
In contrast, O-linked glycosylation involves attaching the carbohydrate molecule to a hydroxyl group on a serine or threonine residue. Phosphorylation is another common PTM, which involves the addition of a phosphate group to a protein. This process is mediated by a group of enzymes known as protein kinases, which transfer phosphate from ATP to a protein substrate. Phosphorylation is a widespread mechanism for regulating protein activity, and it can affect a protein’s activity, localization, and interactions with other proteins.
Acetylation is another type of PTM that involves the addition of an acetyl group to a protein. This process is mediated by a group of enzymes known as acetyltransferases, which transfer an acetyl group from acetyl-CoA to the ε-amino group of lysine residues in a protein. Acetylation is commonly involved in regulating gene expression, and it has been shown to affect various cellular processes such as DNA replication, protein stability, and apoptosis. Ubiquitination is another PTM, which involves the addition of a small protein known as ubiquitin to a target protein. This process is mediated by a group of enzymes known as ubiquitin ligases, which transfer the ubiquitin molecule to a lysine residue on the target protein. Ubiquitination is commonly involved in protein degradation, but it can also affect other aspects of protein function, such as activity, localization, and interaction with other proteins.
Methylation and sumoylation are also examples of PTM. Methylation is the addition of a methyl group to a protein, and it can occur on different amino acid residues such as lysine, arginine, and histidine. Sumoylation involves the addition of a small ubiquitin-like protein known as SUMO to a target protein, and it plays a role in the regulation of protein activity, localization, and stability. In conclusion, the aforementioned are some types of post-translational protein modification.
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Which statement best explains the function of the vesicles?
Select one:
O Delivering packaged materials to the Golgi apparatus for protein
synthesis
O Transporting packaged molecules from the Golgi apparatus to
be released out of the cell
O Exchanging genetic information between the Golgi apparatuses
of separate cells
Extracting portions of the Golgi apparatus to be regenerated for
growth within the cell
Answers
The statement that best explains the function of vesicles is: (b) Transporting packaged molecules from the Golgi apparatus to be released out of the cell.
Vesicles are the membrane enclosed spherical structures that are involved in the process of transportation. The vesicles transport packaged proteins and lipids from the Golgi body to lysosomes, ER or cell membrane. These vesicles are coated with certain protein that direct the pathway for the transport.
Golgi apparatus is a single membranous cell organelle. It is involved in the packaging, sorting and transport of proteins and lipids. The structure of Golgi is composed of cisternae and vacuoles.
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what do biologist call living things
Answers
Living things are called organisms.
movement of hair-cell cilia in a direction toward the tallest cilia results in: group of answer choices none of the answers are correct. depolarization. hyperpolarization. polarization.
Answers
Movement of hair-cell cilia in a direction toward the tallest cilia results in depolarization.
Hair cells are sensory cells found in the inner ear. They have hair-like structures called cilia that are arranged in a gradient of heights. When hair-cell cilia are stimulated by sound waves or head movement, they move in a certain direction. When the cilia are bent in a particular direction, they cause ion channels in the hair cell membrane to open, allowing positively charged ions to enter the cell. The influx of potassium ions leads to an increase in the positive charge inside the cell, resulting in depolarization. This depolarization generates an action potential that is transmitted to the brain. If they move towards the tallest cilia, this causes the opening of mechanically-gated ion channels, allowing potassium ions to enter the cell.
In contrast, movement away from the tallest cilia results in hyperpolarization, which is a decrease in the positive charge inside the cell. Depolarization and hyperpolarization are crucial for the transmission of auditory and vestibular signals to the brain, helping us perceive sound and maintain balance.
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methamphetamine enhances energy and mood by triggering the release of the neurotransmitter
Answers
Methamphetamine is a powerful stimulant drug that enhances energy and mood by triggering the release of the neurotransmitter dopamine in the brain.
Dopamine is a chemical messenger that plays a crucial role in regulating motivation, pleasure, and reward. When methamphetamine is consumed, it enters the brain and stimulates the release of dopamine from neurons in the brain's reward pathway. This leads to an intense rush of euphoria and a surge of energy.
Methamphetamine also inhibits the reuptake of dopamine, meaning that it prevents the brain from reabsorbing dopamine back into the neurons that released it. As a result, dopamine levels remain elevated in the brain, leading to prolonged feelings of pleasure and a sense of well-being.
However, methamphetamine abuse can have serious negative consequences, including addiction, psychosis, and physical harm to the body. The long-term use of methamphetamine can damage the brain's dopamine receptors, leading to permanent changes in mood and behavior. Therefore, it is essential to seek professional help to overcome methamphetamine addiction and avoid its harmful effects.
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Based on this information, what is the minimum size of a codon for these hypothetical martian life-forms?.
Answers
Answer:
george is cute
Explanation:
Which of the following statements about the function of a vesicle fusion protein is correct?
A. t-SNAREs localize to vesicles and generate appropriate membrane curvature
B. Rab proteins are responsible for docking of vesicles on target membranes
C. NSF is responsible for vesicle-membrane specificity
D. v-SNAREs provide energy for vesicle fusion
Answers
The statement "v-SNAREs provide energy for vesicle fusion" is correct. Therefore, option (D) is correct.
Vesicle fusion proteins play a crucial role in transporting cellular cargo from one compartment to another. One such protein is v-SNARE, which is located on the vesicle membrane. It interacts with t-SNARE, a protein located on the target membrane, to initiate the fusion process. This interaction results in the formation of a stable four-helix bundle, which brings the two membranes in close proximity and ultimately leads to fusion.
However, v-SNAREs do not provide energy for this process; instead, it is driven by a combination of factors such as the release of calcium ions, the formation of a lipid bridge, and the rearrangement of membrane lipids. Therefore, the correct statement about the function of a vesicle fusion protein is that v-SNAREs facilitate the fusion process by interacting with t-SNAREs, but they do not provide energy for it.
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The time it takes to run a mile depends on the person running speed what is the independent and dependent variable as well as the constants
Answers
Independent: The person's running speed
Dependent: The time it takes to run a mile
Constants: The mile.
-------
The independent variable stands on it's own. It will not change based on the Dependent Variable.
The dependent variable, the time it takes a person to run a mile, will change based on the Independent Variable, the person's running speed.
The constant is the mile. In an experiment, the mile, will stay the same. In each trial, it will stay the same, unlike the data for the independent and dependent variable.
If one strand of DNA double helix has the following nucleotide sequence ATCGGTCAAGCTAGG what would the dna complementary stand read
Answers
Answer:
TAGCCAGTTCGATCC
Explanation:
In DNA, there are 4 different nucleotide bases. Adenine (A), Thymine (T), Cytosine (C) and Guanine (G).
A (adenine) always pairs with T(thymine) and C(cytosine) always pairs with G (guanine).
If we have the strand:
ATCGGTCAAGCTAGG
We have to pair A with T, and C with G. Therefore, the complementary strand of DNA will be:
TAGCCAGTTCGATCC
______________ spores are formed by mitosis and _________ spores are made by meiosis.
Answers
Homosporous spores are formed by mitosis and heterosporous spores are made by meiosis.
Mitosis is a process of cell division in which one cell divides into two identical cells. In the case of homosporous spores, a single parent cell undergoes mitosis to produce spores that are genetically identical to each other and to the parent cell. Homosporous spores are commonly found in plants like mosses and ferns.
On the other hand, heterosporous spores are made by meiosis. Meiosis is a type of cell division that results in the production of cells with half the number of chromosomes as the parent cell. In the case of heterosporous spores, a parent cell undergoes meiosis to produce two different types of spores: megaspores and microspores.
Megaspores develop into female gametophytes, while microspores develop into male gametophytes. This reproductive strategy is found in plants like gymnosperms and angiosperms.
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Can someone please help me
Answers
Answer:
Embryonic stem cells. Embryonic stem cells come from human embryos that are three to five days old. ...
Non-embryonic (adult) stem cells. ...
Induced pluripotent stem cells (iPSCs) ...
Cord blood stem cells and amniotic fluid stem cells.
Which type of animal could live in a temperate deciduous forest?
O one that is adapted to hot summers and cold winters
O one that prefers only extremely cold temperatures
O one that does not build their
homes amid trees
O one that prefers a climate with little rain or snow
Answers
Answer:
one that is adapted to hot summers and cold winters
Explanation:
A temperate deciduous woodland can support animals that are acclimated to scorching summers and frigid winters. These woods have a mild environment, with warm summers and chilly winters, and are distinguished by trees that shed their leaves in the autumn. Animals that live in these woods have adapted to periodic shifts by hibernating, migrating, or altering their diet. Deer, squirrels, bears, wolves, rabbits, and different bird species are instances of creatures that reside in temperate deciduous woods.
which two of the following arrows show matter moving from primary consumer to an omnivore
Answers
Answer:
A
Explanation:
Because
Caribou is a primary consumer
Bear is an omnivore
leftovers of living things that can be composted
Answers
Agricultural applications: 895
Silvicultural applications: 104
Picture:
Using the codon chart below, identify the correct amino acid sequence created
during translation for the following mRNA:
AUG CAC UUA UAA
Thr-Pro-Gin-Arg
Met-Leu-Phe-Pro
Val-Arg-Gly-Stop
Met-His-Leu-Stop
Answers
Answer:
e
Explanation:
when elements combine chemically why are they not easily identifiable
Answers
Answer:
they form a radical
Explanation:
radical act as a single unit during chemical reaction..
why are calendar years rounded
Answers
Answer:
The differences arise because it actually takes the Earth around 365.25 days to make a full orbit. This value is rounded down for the sake of our timekeeping.
Explanation:
fraser jh, helfrich mh, wallace hm, ralston sh. hydrogen peroxide, but not superoxide, stimulates bone resorption in mouse calvariae. bone
Answers
Based on the information you provided, it seems that you are referring to a scientific study titled "Hydrogen peroxide, but not superoxide, stimulates bone resorption in mouse calvariae" conducted by Fraser JH, Helfrich MH, Wallace HM, and Ralston SH.
The study conducted by Fraser JH, Helfrich MH, Wallace HM, and Ralston SH titled "Hydrogen peroxide, but not superoxide, stimulates bone resorption in mouse calvariae" explores the impact of hydrogen peroxide on bone resorption in mouse calvariae.
The study found that hydrogen peroxide, but not superoxide, stimulates bone resorption in this specific mouse model.
Please let me know if you have any further questions or if there's anything else I can assist you with.
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