Question

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

1.DNA is not transcribed when chromatin is packaged tightly in a condensed form

2.Some forms of chromatin modification can be passed on to future generations of cells

3.Acetylation of histone tails in chromatin allows access to DNA for transcription

4.Acetylation of histone tails is a reversible process.

5. Methylation of histone tails in chromatin can promote condensation of the chromatin

6. Deacetylation of histone tails in chromatin loosens the association between nucleosomes and DNA

Answer 1

chromation is condensed form of chromosome that is found only in eukaryotes and consists of DNA proteins and RNA. Some of the facts about the modification of chromatin are as follows

Dna is not transcribed when chromatin is packaged tightly in a condensed form is true.some forms of chromatin modification can be passed on to future generations of cells is true. Acetylation of histone tails in chromatin allows access to DNA for transcription. Acetylation of histone tails is a reversible process. Methylation of histone tails in chromatin can promote condensation of the chromatin.

Deacetylation donot cause the chromatin to loose but it condenses the chronation.

Hence the statements 1,2,3,4,5 are true.