Given diagram of cell cycle shows the relative duration of four phases and an event occurring during each phase. Identify the option which correctly represents the cell cycle phase.

II-S phase

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I - G_{1}

phase

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I I I - G_{2}

phase

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I V - G_{2}

phase

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Solution

The correct option is D $I V - G_{2}$ phase
The cell cycle is a 4-stage process consisting of Gap 1 $(G_{1})$ , synthesis (S), Gap 2 $(G 2)$ and mitosis (M), which a cell undergoes as it grows and divides.

Histone protein synthesis occurs in S-phase of cell division.
Cell grows in size in interphase of cell division.
Cell increases in number in G $_{1}$ phase of cell division.
RNA and protein synthesis occurs in G $_{1}$ and G $_{2}$ phase of cell division.

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Q. 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.

Q. Select the correct option:

The given graph shows the change in DNA content during various phases (A to D) in a typical mitotic cell cycle. Identify the phases and select the correct option.

Q. Of the four different phases of mitotic cell cycle, usually the phase with the shortest duration is the __________.

Q. Which phase of cell cycle is of shortest duration?

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