Read the following statements and choose the correct set: (a) Euchromatin is loosely packed chromatin (b) Heterochromatin is transcriptionally active (c) Histone octomer is wrapped by negatively charged DNA in nucleosome (d) Histones are rich in lysine and arginine (e) A typical nucleosome contains 400 bp of DNA helix Choose the correct answer from the options given below :

Options

1. (a), (c), (d) only
2. (b), (e) only
3. (a), (c), (e) only
4. (b), (d), (e) only

Correct Answer

(a), (c), (d) only

Explanation

Euchromatin is loosely packed and transcriptionally active; DNA wraps around histone octamers (rich in lysine/arginine) forming nucleosomes.

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