Question

Which of the following is true about the G1 phase of the cell cycle?

• A. Supply of oxygen increases
• B. Supply of carbon dioxide increases
• C. Size of the vacuole increases
• D. Protein synthesis increases

Answer 1

The correct option is D

Protein synthesis increases

G₁ phase together with the S phase and G₂ phase comprise the longest period of the cell cycle called interphase. Interphase takes place before cell division in mitosis (M phase).
During G₁ phase, the cell grows in size and synthesizes mRNA and proteins (known as histone proteins) that are required for DNA synthesis.