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WebJun 8, 2024 · These checkpoints occur near the end of G 1, at the G 2 /M transition, and during metaphase. Figure 10.3 B. 1: Internal Checkpoints During the Cell Cycle: The cell cycle is controlled at three checkpoints. The integrity of the DNA is assessed at the G1 checkpoint. Proper chromosome duplication is assessed at the G2 checkpoint. WebTopic questions for Biology with mark schemes. These Topic Questions have been taken from Cambridge IGCSE Past Exam Papers and also from Cambridge Lower Secondary … celebrities with interesting lives
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