Question

The number of DNA strands in a chromosome at the G2 stage is :

• A. 1
• B. 4
• C. 3
• D. 0

Answer 1

Answer:

B. 4

• The number of DNA strands in a chromosome at the G2 stage of the cell cycle is four due to replication of DNA during the S-phase.

• At the beginning of cell division, each chromosome has two strands of DNA (two strands in a DNA double helix). And after replication, each strand synthesizes a new strand, giving rise to a total of 4 strands.