Read the following statements and choose the set of correct statements: (a) Euchromatin is loosely packed chromatin (b) Heterochromatin is transcriptionally active (c) Histone octamer 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:
medium
Molecular Basis of Inheritance
2022
biology
(b), (d), (e) Only
(a), (c), (d) Only
(b), (e) Only
(a), (c), (e) Only
Explanation
To solve this problem, we need to analyze each statement and determine which are correct:ā(a) Euchromatin is loosely packed chromatin: - Euchromatin is indeed loosely packed and is generally transcriptionally active. - Therefore, statement (a) is correct.ā(b) Heterochromatin is transcriptionally active: - Heterochromatin is tightly packed and is usually transcriptionally inactive.
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