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  • Which of the following is true regarding the packaging of DNA helix in eukaryotes?Option: 1 Heterochromatin is characterized by a

Which of the following is true regarding the packaging of DNA helix in eukaryotes?

Option: 1

Heterochromatin is characterized by a loose chromatin structure and high gene expression.


Option: 2

DNA is wrapped around a group of non-histone proteins to form a nucleosome.


Option: 3

The SWI/SNF complex is involved in adding chemical modifications to the histone proteins.


Option: 4

The linker histone H1 is involved in unwinding DNA for replication and transcription


Answers (1)

best_answer

In eukaryotes, DNA is wrapped around a group of histone proteins to form a nucleosome. Heterochromatin is characterized by a tightly packed chromatin structure and low gene expression. The SWI/SNF complex is involved in changing the positioning of nucleosomes along the DNA. The linker histone H1 is involved in stabilizing the nucleosome structure by binding to the DNA between nucleosomes, not in unwinding DNA for replication and transcription. Hence option 2 is the correct answer. 

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