GENETICS AND EVOLUTION
MOLECULAR BASIS OF INHERITANCE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
G1 Phase
|
|
|
G2 Phase
|
|
|
S Phase
|
|
|
M Phase
|
Detailed explanation-1: -This phase is followed by the G1 phase (gap 1), which corresponds to the interval (gap) between mitosis and initiation of DNA replication. During G1, the cell is metabolically active and continuously grows but does not replicate its DNA. G1 is followed by S phase (synthesis), during which DNA replication takes place.
Detailed explanation-2: -the correct option is ‘During S phase’.
Detailed explanation-3: -In bacteria, the DNA replication machinery is assembled at the single origin of DNA replication in a characteristic location. In Caulobacter, the replisome is located at one end of the rod-shaped bacterium but in E. coli, it is located in the middle of the cell (Toro and Shapiro 2010).
Detailed explanation-4: -The interphase of a normal cell cycle will thus, consist of the G1 (Gap 1) phase, S (Synthesis) phase, and G2 (Gap 2) phase. The S phase is the phase in which replication of DNA will take place which is then followed by histones synthesis. This is the phase taking place between the G1 phase and G2 phase.