CELL DIVISION
CELL DIVISION AND CANCEROUS CELLS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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divides into 2 daughter cells
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undergoes apoptosis
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copies its DNA
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checks to make sure the DNA was completely and accurately copied
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Detailed explanation-1: -The G2 checkpoint bars the entry to the mitotic phase if certain conditions are not met. As in the G1 checkpoint, cell size and protein reserves are assessed. However, the most important role of the G2 checkpoint is to ensure that all of the chromosomes have been replicated and that the replicated DNA is not damaged.
Detailed explanation-2: -The number of DNA strands in the chromosome at the G2 stage of the cell cycle is four due to replication of DNA during the S-phase. There are 2 strands of DNA at the start of cell division. And after replication, each strand synthesizes a new strand, giving rise to a total of 4 strands.
Detailed explanation-3: -Abstract. 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.
Detailed explanation-4: -Interphase is divided into G1, S, and G2 phases. It is during interphase that the cell grows by making proteins and cytoplasmic organelles. During S phase, the DNA is replicated, yielding sister chromatids. G2 involves the last bit of growth, and also, DNA proofreading and repair.