DNA replication

Question

A cell is preparing to divide. A laboratory display needs a caption explaining why its genome is copied beforehand. Which caption is accurate?

1. AThe copies provide a complete genome for each resulting cell.✓ Correct

   Copying prepares a genome for each daughter cell.

2. BThe copying step removes the genome from both resulting cells.✗ Incorrect

   The purpose is to retain a genome in each resulting cell.

3. CThe genome is copied only after both resulting cells form.✗ Incorrect

   The copying occurs before division.

4. DThe copied genome is reserved for just one resulting cell.✗ Incorrect

   Each daughter cell receives its own genome.

Answer

A. The copies provide a complete genome for each resulting cell.

Rationale

Replication precedes division. By copying its DNA first, the cell prepares genomic material for both daughter cells.