Question

unit 2.3 cell cycle, mitosis, meiosis quiz 2025 - 26
which of the following accurately describes the actions occurring during the s phase of the cell cycle
each chromosome is duplicated; each chromosome results in two sister chromatids attached at a centromere
the chromosome number is halved in preparation for cell division
the cell enlarges, proteins are increased and organelles duplicated
cell reaches maximum size and takes in more proteins.

Explanation:

In the S - phase of the cell cycle, DNA replication occurs. Each chromosome is replicated, resulting in two sister chromatids attached at a centromere. The option stating this accurately describes the S - phase actions. The other options describe events of other phases (e.g., cell growth and organelle duplication in G1 or G2).

Answer:

Each chromosome is replicated; each chromosome results in two sister chromatids attached at a centromere.