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STD 11 - 10. Cell cycle and cell division — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYSTD 11 - 10. Cell cycle and cell division1 Mark
MCQ
Assertion : Interphase is resting stage.
Reason : The interphase cell is metabolically inactive
  • A
    If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
  • B
    If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
  • ✓
    If the Assertion is correct but Reason is incorrect.
  • D
    If both the Assertion and Reason are incorrect.
✓

Answer

Correct option: C.
If the Assertion is correct but Reason is incorrect.
c
Previously interphase is called resting stage because there is no apparent activity related to cell division. The interphase cell is metabolically quite active. Interphase consist of three subphases ($G_1 , G_2$ and $S$). Synthesis of $DNA$ occurs in $S$ phase. $G_1$ is the period between the end of mitosis and the start of $S$ phase. $G_2$ is the phase between $S$ phase and the next mitosis. As the synthesis of $DNA$ and proteins occurs in interphase so, it is considered as metabolically active phase.

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