Single Choice

Select the correct option: Read the following statements about cell division and select the correct ones. (i) M phase represents the phase when actual cell division occurs and I phase represents the phase between two successive M phases. (ii) In the 24 hours average duration of cell cycle of a human cell, cell division proper lasts for only about an hour. (iii) M phase constitutes more than 95% of the duration of cell cycle.

A(i) and (ii)
Correct Answer
B(ii) and (iii)
C(i) and (iii)
D(i), (ii) and (iii)

Solution

Cell cycle consists of two basic phases, long nondividing I phase and a short dividing M phase . In the average duration of 24 hours in the cell cycle of dividing human cell , M phase lasts for one hour (less than $$5\%$$ of total) while I phase or interphase occupies $$75-95\%$$ of total generation time.
So, the correct answer is '(i) and (ii)'.

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