Question

The diagram represents the cell cycle.
Compared to a cell in the G${}_2$ phase, a cell in the G${}_1$ phase has

• A. Twice as much DNA
• B. Half as much DNA
• C. Twice as many centromeres
• D. Half as many centromeres
• E. Twice as many chromosomes

Answer 1

The correct option is B Half as much DNA

G${}_1$ and G${}_2$ phases of the cell cycle are separated by S phase which in turn is marked by DNA replication. The process of DNA replication double the DNA content of a G${}_2$ phase cell as compared to its respective G${}_2$ phase cell. The duplicated DNA content is accommodated in two chromatids of the single chromosome, both G${}_1$ and G${}_2$ cells have the same number of centromeres and chromosomes. So, the correct answer is option B.