Question

in which phase of the cell cycle is deoxyribonucleic acid replicated?
○ metaphase
○ gap phase i
○ anaphase phase
○ gap phase ii
○ synthesis phase

Explanation:

To determine the phase of the cell cycle where DNA (deoxyribonucleic acid) is replicated, we analyze each option:

• Metaphase: Chromosomes align at the cell equator, no DNA replication.
• Gap phase I (G₁): Cell grows and prepares for DNA replication, but replication doesn't occur here.
• Anaphase: Sister chromatids separate, no DNA replication.
• Gap phase II (G₂): Cell prepares for mitosis after DNA replication, replication is already done.
• Synthesis phase (S phase): This is the phase where DNA is replicated to produce two identical copies.

Answer:

Synthesis phase