Question

Is the following statement true or false: Regardless of whether a gene is expressed in a given cell type, it will replicate at the same, characteristic time during S phase. Explain your reasoning.

A. True, because all genes replicate simultaneously in S phase.
B. False, because replication timing is specific to each gene and cell type.
C. True, because replication is a universal process in all cell types.
D. False, because gene expression and replication are unrelated processes.

Answer 1

The statement is false because each gene has specific replication timing dependent on its activity and is not replicated simultaneously during the S phase.

Step-by-step explanation:

The statement is False because replication timing is specific to each gene and cell type. Gene expression and replication are indeed related processes. While DNA replication is a universal process that occurs during the S phase of the cell cycle, not all genes are replicated simultaneously. The timing of replication can be influenced by a gene's activity; for example, genes that are actively expressed are typically replicated earlier in S phase. Additionally, certain areas of the genome called replicons, which contain multiple origins of replication, ensure that the entire DNA is replicated efficiently during the S phase. This orchestrated timing ensures that the overall structure and function of the chromatin are maintained.