Question

If the DNA content of a cell in G1 phase is 4C, what would be its DNA content in G2 phase?

• A. 1C
• B. 2C
• C. 4C
• D. 8C

Answer 1

The correct option is D

8C

The correct option is D:

Explanation of the correct option:

1. On their way to cell division, cells go through a series of carefully controlled and regulated stages of growth, DNA replication, and cell division that result in two genetically identical cells.
2. The cell cycle's interphase is divided into four stages:
   1. G1 is the first stage of the cell cycle: It is the first phase of the interphase, beginning at the end of the preceding M phase and lasting until DNA synthesis begins. The G1 phase is also known as the growth phase since the cell's biosynthetic activities are at their peak at this time.
   2. G0 Phase of Cell Cycle: The G0 phase of the cell cycle is known as the resting phase, and cells in this phase are known as resting cells. Neurons, for example, enter this phase after exiting the cell cycle and never divide again. Cells enter a resting state when they are deprived of nutrition or growth stimuli.
   3. S Phase of Interphase: This is the third stage in the cell cycle sequence, and it occurs between the G1 and G2 phases. The word S stands for synthesis, and it is a highly specialised phase of interphase. In this phase, DNA synthesis takes occur. A cell must make a fresh copy of its chromosomes before it may divide.
   4. G2 Phase of Cell Cycle: The G2 phase lasts from the end of the S phase to the beginning of mitosis. Interphase is usually the shortest component of the process. During this period, there is a lot of cellular synthesis going on. Mitochondria and chloroplasts divide, resulting in an increase in energy storage.
3. Number of DNA in a cell doubles after S Phase of the cell cycle.

Final answer: If the DNA content of a cell in G1 phase is 4C then its DNA content in G2 phase will be 8C.