CELL STRUCTURES AND FUNCTION
CELL CYCLE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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S phase, cell division
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M phase, cell growth
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G1 phase, DNA replication
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G2 phase, preparation for division
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Detailed explanation-1: -Gap 2 Phase This last stage is all about prepping the cell for mitosis or meiosis. During G2, the cell has to grow some more and produce any molecules it still needs to divide. This includes assembly of the microtubules, which will make up an important structure called the spindle during mitosis.
Detailed explanation-2: -So, the correct statement is ‘G2 phase is pre-mitotic phase characterised by the formation of new proteins.
Detailed explanation-3: -The G2-phase checkpoint, also known as G2/M-phase checkpoint, has the function of preventing cells with damaged DNA, lasting from the G1 and S phases or generated in G2, from undergoing mitosis. The mechanisms acting during the G2-phase checkpoint converge on the inhibition of the mitotic complex CDK1-cyclin B.
Detailed explanation-4: -The G2 checkpoint prevents cells from entering mitosis when DNA is damaged, providing an opportunity for repair and stopping the proliferation of damaged cells. Because the G2 checkpoint helps to maintain genomic stability, it is an important focus in understanding the molecular causes of cancer.