Assertion :Some cells enter G0 phase leading to inactivation of cell cycle. Reason: G0 phase occurs due to non-availability of mitogen and energy rich compounds.
A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Both Assertion and Reason are incorrect
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Solution
The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion The phase in which cells fail to divide further (do not undergo S-phase after G1- phase) is known as G0 phase or quiescent stage. It occurs due to non-availability of mitogen and energy rich compounds. The cells remains metabolically active but no longer proliferate unless called on to do so depending on the requirement of the organisms.