Mitosis

Mitosis can be observed in _____

• Polyploid individual

• Diploid individual

• Haploid individual

• All of the above

Mitosis results in

• Reduction in chromosome number

• Doubling of chromosome number

• Constant chromosome number

• Increase in cell volume

If initial amount of DNA is 8C , then after M phase the amount of DNA will be

• 16C

• 64C

• 8C

• 4C

If you want to count the number of chromosomes, which is the best stage to do so?

• prophase

• metaphase

• anaphase

• telophase

Assertion: G1 phase is the interval between mitosis and initiation of DNA replication.

Reason: The cell is metabolically inactive during G1 phase.

• If both Assertion and Reason are true and Reason is the correct explanation of Assertion.

• If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.

• If Assertion is true but Reason is false.

• If both Assertion and Reason are false.

How many mitotic divisions are required for a single cell to make 128cells ?

• 28

• 32

• 14

• 7

Colchicine arrests cell division at

• interphase

• prophase

• metaphase

• anaphase

In mitosis, centromere divides during

• anaphase

• metaphase

• prophase

• telophase

In mitosis the movement of chromosomes requires

• spindle fibres

• aster

• actin

• myosin

This structure tends to vanish always during meiosis and mitosis

• All of these

• Plasma membrane

• Nucleolus and nuclear membrane

• chromosomes