Question

10. How many dna molecules are present in the nucleus of human somatic cell in g2 stage of cell cycle ? A. 23 b. 46 c. 69 d. 92

Answer 1

Answer:

The correct answer is (b) 46.

Explanation:

If we talk about the timing of DNA synthesis then it divides cell cycle into four phases and these phases are G1 phase, G2 phase, S phase and M phase. The question asked about the number of DNA molecules present in G2 phase. In G2 phase the number of DNA molecules in each chromosome is two and as we know that there are total 23 chromosomes are there. In totality , there are 46 DNA molecules in the nucleus of human somatic cell in G2 stage of cell cycle.

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Answer 2

We know that the cell cycle is divided into four different phases, namely:

1. G1 Phase

2. G2 Phase

3. S Phase

4. M Phase

In this question, we have to find out the total number of DNA molecules in the G2 phase.

We are aware that the number of DNA molecules in each chromosome of the G2 phase is two.

As the total number of chromosomes is 23, there will be 46 DNA molecules in the nucleus of the human somatic cell in the G2 stage of the cell cycle.

Hence, Option (B) is correct.