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Interphase: G1, S, G2 phase- cell cycle and cell division, Biology, Class 11 Video Lecture

FAQs on Interphase: G1, S, G2 phase- cell cycle and cell division, Biology, Class 11 Video Lecture

1. What is interphase in the cell cycle?
Ans. Interphase is the longest phase in the cell cycle, where the cell prepares for cell division. It consists of three subphases: G1, S, and G2. During interphase, the cell grows, DNA replicates, and necessary proteins and organelles are synthesized.
2. What happens during the G1 phase of interphase?
Ans. During the G1 phase of interphase, the cell grows in size and prepares for DNA replication. It synthesizes RNA, proteins, and organelles required for cell division. The G1 phase is also a checkpoint where the cell checks for any damage or errors before proceeding to the S phase.
3. What occurs during the S phase of interphase?
Ans. The S phase of interphase is the DNA synthesis phase. During this phase, the cell replicates its DNA to ensure that each daughter cell receives a complete set of genetic material. The DNA replication process occurs in the nucleus, and by the end of the S phase, the cell has doubled its DNA content.
4. What happens during the G2 phase of interphase?
Ans. The G2 phase of interphase is a period of preparation for cell division. The cell continues to grow and produces proteins necessary for mitosis. It also checks for any DNA replication errors and repairs them. Additionally, the cell undergoes further growth and prepares its organelles for division.
5. How does interphase contribute to cell division?
Ans. Interphase is essential for cell division as it prepares the cell for mitosis. During interphase, the cell grows, replicates its DNA, and synthesizes necessary proteins and organelles. These preparations ensure that each daughter cell receives a complete set of genetic material and sufficient resources to function independently. Without interphase, cells would not be adequately prepared for division, leading to abnormalities and potential cell death.
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