Which of the following phases involve the replication of DNA in preparation for mitosis?

S phase

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R phase

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G1 phase

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G2 phase

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Solution

The correct option is A
S phase

The Synthesis phase involves replication of DNA. The G1, S and G2 phases therefore together comprise the Interphase. Therefore, it is also widely stated that DNA replication occurs during interphase.

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(A)	Second gap phase	-	Cytoplasmic growth continues
(B)	First gap phase	-	Initiation of replication
(C)	Interphase	-	Phase of preparation for cell division
(D)	DNA synthesis phase	-	Doubling of number of chromosome in cell

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