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Read the following statem ents and choose the set of correct statem ents:
(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 n ucleosom e contains 400 bp of DNA helix
choose the correct answer from the options given below: 
  • a)
    (a), (c), (d) Only
  • b)
    (b), (e) Only
  • c)
    (a),(c),(e) Only
  • d)
    (b), (d), (e) Only
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
Read the following statem ents and choose the set of correct statem en...
(a) Euchromatin refers to the loosely packed form of chromatin, which is more accessible to transcription factors and therefore generally associated with active gene expression.
(c) In a nucleosome, the histone octamer (composed of two copies each of H2A, H2B, H3, and H4) is indeed wrapped by negatively charged DNA. The DNA is wrapped around the histone core, forming the nucleosome structure.
(d) Histones are rich in positively charged amino acids, particularly lysine and arginine. The positive charge of histones allows them to interact with the negatively charged DNA and play a role in DNA packaging.
Statement (b) is incorrect because heterochromatin is transcriptionally inactive or less transcriptionally active compared to euchromatin.
Statement (e) is incorrect because a typical nucleosome contains about 147 base pairs (bp) of DNA helix, not 400 bp.
Therefore, the correct set of statements is (a), (c), (d) Only, as mentioned in option A.
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Read the following statem ents and choose the set of correct statem ents:(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 n ucleosom e contains 400 bp of DNA helixchoose the correct answer from the options given below:a)(a), (c), (d) Onlyb)(b), (e) Onlyc)(a),(c),(e) Onlyd)(b), (d), (e) OnlyCorrect answer is option 'A'. Can you explain this answer?
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