ANIMAL PHYSIOLOGY
CHEMICAL SIGNALS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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G2 phase (Gap 2 Phase)
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Mitosis
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G1 phase (Gap 1 Phase)
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S phase (Synthesis phase)
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Detailed explanation-1: -In the eukaryotic cell cycle, chromosome duplication occurs during “S phase” (the phase of DNA synthesis) and chromosome segregation occurs during “M phase” (the mitosis phase).
Detailed explanation-2: -S phase is the period during which DNA replication occurs.
Detailed explanation-3: -The S phase of the cell cycle occurs before the interphase and is involved in DNA synthesis or replication. In this way, the genetic material of the cell is replicated before entering mitosis or meiosis, leaving enough DNA to divide into daughter cells. S phase is not initiated until the cell passes the G1 phase.
Detailed explanation-4: -Therefore, during S phase coupling of DNA and histone synthesis occurs, at least in part, through a mechanism that is independent of cyclin/cdk2 activity. Coupling of DNA and histone synthesis in S phase presumably contributes to the prompt and orderly assembly of newly replicated DNA into chromatin.