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

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYSTD 11 - 10. Cell cycle and cell division1 Mark
MCQ
In $‘S’$ phase of the cell cycle
  • ✓
    amount of $DNA$ doubles in each cell
  • B
    amount of $DNA$ remains same in each cell
  • C
    chromosome number is increased
  • D
    amount of $DNA$ is reduced to half in each cell.
✓

Answer

Correct option: A.
amount of $DNA$ doubles in each cell
a
(a) : In $‘S’$ phase of cell cycle the $DNA$ content doubles, $i.e.$, $1\ C$ to $ 2 \ C$ for haploid cells and $2\ C$ to $4\ C$ for diploid cells. However, the number of chromosomes does not increase.

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