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KIM [24]
3 years ago
8

Which statements about the modification of chromatin structure in eukaryotes are true? Select all that apply.

Biology
1 answer:
Crank3 years ago
6 0

Ans.

Chromatin molecules are made up of DNA and histone proteins. Modification of chromatin structure include covalent, post-translational changes in histone proteins, present in chromation. Acetylation and methylation are two important histone modifications that affect structure of chromatin molecules.

Acetylation involves addition of an acetyl group to histones that increases transcription of DNA by loosen the association between DNA and nucleosome.

Methylation involves addition of a methyl group to histones that results in condensation of chromatin molecule and thus, decreases transcription of DNA.

Both acetylation and methylation are reversible processes.

Many chromatin modifications are genetic, means they can pass from one generation to another generation, called epigenetic modifications.

Thus, options B), C), D), E), and F).

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3 0
3 years ago
After infection of a cell, a viral particle must transport itself to the nucleus in order to produce viral proteins. What is the
kykrilka [37]

Answer:

Double-stranded DNA

Explanation:

If a virus requires to transport its genome in the nucleus to produce viral protein then the viral genome content must be DNA. This DNA of the virus will use the RNA polymerase of the host cell and will first convert into mRNA in the nucleus.

Then the mRNA of the virus will come out of the nucleus because the protein synthesis takes place outside the nucleus and in the cytoplasm. So in the cytoplasm by using host translational machinery the viral mRNA will code for viral proteins. So the correct answer is double-stranded DNA.

3 0
3 years ago
Name two strengthening/support tissues. Explain your answer
kompoz [17]

Cartilage and bone, two key types of supporting connective tissue, assist the body to maintain its posture and protect internal organs.

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8 0
3 years ago
Why doesn’t the Antibodies in Lyme Disease Antigens (orange line) decrease after the first immune response, compared to non-Lyme
aev [14]

Answer:

Even after an infection is over, your immune system continues to make antibodies. Once you test positive for the bacteria, your blood will continue to test positive for months or years even after the bacteria are no longer present.

Explanation:

using brain

3 0
2 years ago
What caused scientists to change their ideas about cellular structures
mart [117]
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8 0
3 years ago
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