THE CELL
CELL COMMUNICATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A cell is found to have 10 units of DNA after mitosis, how many units would be found at the end of G1?
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0
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5
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10
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20
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Explanation:
Detailed explanation-1: -G1 or first growth is followed by S phase or synthesis phase. DNA replication occurs in S phase and DNA amount doubles up, i.e., a cell with 2C DNA in G1 phase will now have 4C DNA. G2 phase is second growth phase where the DNA content remains the same 4C.
Detailed explanation-2: -Mitosis ends with 2 identical cells, each with 2N chromosomes and 2X DNA content.
Detailed explanation-3: -During G1 phase, cells are metabolically active and cellular contents are synthesized and thus there is overall cell growth. G1 phase is followed by S phase. DNA replication occurs in the S phase where DNA synthesis occurs and the content of DNA gets doubled. At the end of G1 phase, each chromosome has one chromatid.
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