Question

Which phase corresponds to the interval between the mitosis and initiation of DNA replication?

a.) S-phase

​​​​​b.) M-phase

c.) G1 phase

d.) G2-phase

Answer 1

The interval between the end of mitosis and the initiation of DNA replication corresponds to the G1 phase of the cell cycle, where cell growth and preparation for DNA synthesis occur.

Step-by-step explanation:

The phase of the cell cycle that corresponds to the interval between the end of mitosis and the initiation of DNA replication is the G1 phase. During this phase, the cell undergoes growth and prepares for the synthesis of DNA, which occurs in the subsequent S phase.

The G1 phase is sometimes referred to as the first gap phase since there is no DNA synthesis happening yet, and the cell is mainly focused on accumulating the building blocks of chromosomal DNA and the necessary energy reserves for the upcoming synthesis during the S phase. It is characterized by the accumulation of building blocks of chromosomal DNA and associated proteins, as well as the accumulation of sufficient energy reserves to replicate each chromosome in the nucleus.