Question

The DNA wraps tightly around the histone octamer with exactly _________.

a) 1.5 turns
b) 1 turn
c) 2 turns
d) 3 turns

Answer 1

DNA wraps around the histone octamer with approximately 1.65 turns, and 1.5 turns is a reasonable approximation for this structural arrangement. Therefore, the correct answer is option a) 1.5 turns.

Step-by-step explanation:

DNA wraps around the histone octamer with approximately 1.65 turns. This structural arrangement forms the nucleosome, the fundamental unit of chromatin.

The winding of DNA around histones helps in the compaction of genetic material, regulates access to genetic information, and plays a crucial role in various cellular processes, including gene expression and replication.

The 1.5 turns mentioned in the answer closely represents this structural relationship between DNA and histones.

Therefore, the correct answer is option a) 1.5 turns.