NEET Solved Paper 2014 Question 16
Question: During which phase(s) of cell cycle, amount of DNA in a cell remains at 4C level if the initial amount is denoted as 2C? [AIPMT 2014]
Options:
A) $ G _0 $ and $ G _1 $
B) $ G _1 $ and S
C) Only $ G _2 $
D) $ G _2 $ and M
Show Answer
Answer:
Correct Answer: D) $ G _2 $ and M
Solution:
- The amount of DNA in a cell changes during the cell cycle. If the initial amount of DNA is denoted as 2C, the DNA content doubles to 4C after DNA replication during the S phase. The 4C level of DNA is maintained through the G2 phase and remains at 4C until the end of the M phase, where the cell divides, and the DNA content returns to 2C in each daughter cell.
Therefore, the amount of DNA in a cell remains at the 4C level during the G2 phase and the M phase.
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