Molecular-Basis-Of-Inheritance Question 196

Question: Chromatin structure must be altered in order for gene expression to occur because:

Options:

A) Condensed chromatin is replicated but not transcribed.

B) Condensed chromatin makes most DNA sequence inaccessible to the transcription complex.

C) Decondensed chromatin has more nucleosomes per DNA molecule.

D) Heterochromatin is actively transcribed and euchromatin is not transcribed.

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Answer:

Correct Answer: B

Solution:

[b] Nucleosomes condense the DNA.

Heterochromatin is transcriptionally inactive, while euchromatin is transcriptionally active.