Attachment of acetyl groups to __________ promotes transcription.

Biology

1 answer:

Natasha2012 [34]3 years ago

7 0

Attachment of acetyl groups to histone promotes transcription.

This mechanism is known as histone acetylation and it is a part of gene expression. The lysine residues inside the N-terminal tail from the histone core of the nucleosome are the substrate for enzymes-histone acetyltransferase which transfer an acetyl functional group from another molecule. Acetylation removes the positive charge on the histones and thus decrease the interaction negatively charged phosphate groups of DNA. As a result, chromatin becomes more relaxed structure and transcription is promoted.

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Answer:

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Explanation:

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3 years ago

At the end of meiosis, there are _______ cells with _______the amount of dna.

Natasha2012 [34]

At the end of meiosis, there are FOUR cells with HALF the amount of DNA.

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In meiosis, the parent cell first duplicates all its genetic material, just like what they do in mitosis. Then it divides, leading 2 genetically identical daughter cells. Mitosis ends here, but in meiosis, the 2 cells divides themselves again, but without duplicating their DNA. This leads to the 4 daughter cells with only half of the number of chromosomes.

We call these cells haploid. They're usually common in gametes. For example, a normal body cell in human has 46 chromosome, but in the cells after meiosis, they only have 23.

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Sickle cell anemia is a disease that causes the blood cells to be shaped like sickles instead of being circular. The table descr

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Answer:

If both parents have sickle cell anemia then the individual will be effected with

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Explanation:

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