Question

Select the correct statement about G${}_1$ phase

• A. DNA in the cell does not replicate
  
• B. It is not a phase of synthesis of macromolecules
  
• C. Cell is metabolically inactive
  
• D. Cell stops growing

Answer 1

The correct option is A DNA in the cell does not replicate


Cell is metabolically inactive

Cell does not remain metabolically inactive in any of the phases of the cell division. Cell is metabolically active in the G${}_1$ phase. Even when a cell is not dividing, it remains metabolically active, that is in the G${}_0$ phase.

DNA in the cell does not replicate

A cell does not replicate its DNA in the G${}_1$ phase. DNA replication occurs only in the S phase. Hence, this is a correct statement about the G${}_1$ phase.

Synthesis of macromolecules is absent

Synthesis of macromolecules such as proteins and mRNA occurs in the G${}_1$ and G${}_2$ phase. These molecules help the cell to grow in size and prepare it for the subsequent phases of the cell cycle.

Cell stops growing

Cells continue to grow in the G${}_1$ phase. Hence, this statement is incorrect.

Final answer: b. DNA in the cell does not replicate.