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Question

First gap phase in cell cycle is

A
before DNA replication
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B
after karyokinesis
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C
after duplication of centrioles
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D
after DNA replication
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Solution

The correct option is A before DNA replication
Cell cycle includes a non-dividing phase, interphase and a dividing phase, mitotic phase.

Interphase has a long duration and during this phase the cell prepares to divide by undergoing cell growth and DNA replication. Interphase is further divided into G1 , S and G2 phases. “G” stands for gap and growth happens during this phase.
First gap phase is the G1 phase. It is a phase of interphase before DNA replication. After the G1 phase, the cell undergoes DNA replication in S phase.

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