Question

Histone proteins are synthesized in a eukaryotic cell,

• A. During entire prophase
• B. During telophase
• C. During S phase
• D. During G${}_2$ stage of prophase

Answer 1

The correct option is C During S phase

A normal cell cycle comprises of interphase and mitosis. The interphase normally comprises of first growth phase (G${}_1$ phase) which starts immediately after the cytokinesis, synthesis phase (S phase) and second growth phase (G${}_2$ phase). The DNA synthesis or DNA replication occurs during S phase. DNA synthesis occurs through DNA replication. This is followed by synthesis of histones. Synthesis of other biochemicals also continues. Centrioles replicate towards the end of S phase or beginning of G${}_2$ phase.

So, the correct answer is option C.