Question

Which of the following is not true about the S phase?

• A. DNA and histones are synthesized
• B. Amount of DNA per cell become half
• C. Even after S phase chromosome number become double
• D. All are true

Answer 1

Answer: (D)

S-phase (synthesis phase) is the part of the cell cycle in which DNA is replicated, occurring between the G1 phase and the G2 phase. It is characterized by: DNA and histones are synthesized and DNA content gets doubled. DNA replicates in a semi-conservative manner.
The amount of DNA per cell becomes double even after S phase chromosome number remains the same.