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In a somatic cell cycle, DNA synthesis takes place in which of the following phases?
  • a)
    S phase 
  • b)
    G1 phase
  • c)
    G2 phase
  • d)
    Prometaphase
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
In a somatic cell cycle, DNA synthesis takes place in which of the fol...
  • The cell cycle consists of several distinct phases, including interphase and mitosis. Interphase, which is the longest phase of the cell cycle, can be further divided into three subphases: G1 (gap phase 1), S (synthesis phase), and G2 (gap phase 2).
  • During the S phase, DNA synthesis occurs. This is the period when the cell replicates its DNA to ensure that each daughter cell produced during cell division receives a complete set of genetic information.
  • The DNA replication process involves unwinding and separating the two strands of the DNA double helix and synthesising new complementary strands using the existing strands as templates. As a result, each chromosome is duplicated, and sister chromatids are formed, which remain attached at the centromere.
  • After the S phase, the cell progresses into the G2 phase, where it prepares for cell division. The subsequent phase is mitosis, which includes prophase, prometaphase, metaphase, anaphase, and telophase, leading to the separation of sister chromatids and the formation of two identical daughter cells.
  • Therefore, DNA synthesis occurs specifically during the S phase of the somatic cell cycle.
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In a somatic cell cycle, DNA synthesis takes place in which of the following phases?a)S phaseb)G1phasec)G2phased)PrometaphaseCorrect answer is option 'A'. Can you explain this answer?
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