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Gelneren [198K]
3 years ago
9

Which statements about the modification of chromatin structure in eukaryotes are true?

Biology
1 answer:
ExtremeBDS [4]3 years ago
3 0
Below statements are true:

<span>Acetylation of histone tails is a reversible process.
</span><span>Acetylation of histone tails in chromatin allows access to DNA for transcription.
</span><span>DNA is not transcribed when chromatin is packaged tightly in a condensed form.
</span><span>Methylation of histone tails in chromatin can promote condensation of the chromatin.
</span><span>Some forms of chromatin modification can be passed on to future generations of cells.</span>
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For each of the following features of nucleic acids, indicate whether it is true of DNA only, of RNA only, of both DNA and RNA,
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Answer:

Nucleic acid is one of the four major macromolecules that is present in all life forms. It includes DNA ( deoxyribonucleic acid) and RNA (ribonucleic acid). It is made up of small unit called nucleotides.

A nucleotide contains a pentose sugar that is deoxyribose in DNA and ribose in RNA, nitrogenous base that is Adenine, Thymine, Cytosine, Guanine in DNA and Adenine, Uracil, Cytosine, Guanine in RNA, and a phosphate group.

It is synthesised by a process of comlementary base pairing ( such as in double stranded DNA, A pairs with T and G pairs with C).

DNA is converted to mRNA inside the nucleus of eukaryotic cell and mRNA is then translated to protein when it moves the cytosplasm of the cell.

Thus, the correct answers are as follows-

1) Is an inherently directional molecule, with an N-Terminus on one end and a C-Terminus on the other end - true neither for RNA or DNA.

2) Contains the base adenine- True for both DNA and RNA.

3) Contains the nucleotide deoxythmidine monophosphate- True for DNA

4) Occurs only in signle stranded form- True for both RNA and DNA( such as single stranded DNA in DNA virus, and RNA in single stranded RNA in AIDS virus).

5) Is synthesized by a process that involves base pairing- True for both DNA and RNA.

6) Is involved in the process of protein synthesis in the cytoplasm of the cells in the liver- True for RNA ( particularly messenger RNA, mRNA)

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3 years ago
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Homologous or sister chromatids
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PLESE HELP IM GONNA FAIL WILL GIVE BRAINLESS
Rudiy27

Answer:

False is the correct answer :)

8 0
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Name two strategies of human body defence system​
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Answer:

You have external defense systems, which include your skin, tears, mucus, saliva, stomach acid, cilia (small hairs) and helpful bacteria. The skin, nails and hair form the integumentary system, which stops dirt and pathogens from entering the body.

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6. How is science based on observation used as evidence? How can this evidence be used?
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Answer:

it is based on observation becasuse you dont automaticly lknow everythig in science sorry about the spellig

Explanation:

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