Which pair is correct?
Correct answer: B. G2 phase, preparation for mitosis
- A. G1 phase, DNA replication
- B. G2 phase, preparation for mitosis
- C. S phase, cell division
- D. M phase, cell growth
Explanation
During the G2 phase of the cell cycle, cells undergo significant preparation for mitosis. This phase is characterized by further growth and synthesis of proteins necessary for cell division. Additionally, G2 serves as a checkpoint where the cell ensures that DNA replication in the preceding S phase is complete and accurate. Furthermore, G2 allows for repair of DNA damage before entering mitosis, ensuring genomic integrity and proper chromosome segregation during cell division.
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Animal, plant, prokaryotic and eukaryotic cells are compared through their membranes, cell walls, nuclei and cytoplasmic organelles. The work includes the structures and functions of mitochondria, chloroplasts, ribosomes, endoplasmic reticulum, Golgi apparatus and lysosomes, as well as chromosome organization and the distinction between chromatin and chromosomes.
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