The measured DNA levels ranged from 3 to 6 picograms per nucleus. In which stage of the cell cycle was the nucleus with 6 picograms of DNA?
Correct answer: D. G2
- A. G0
- B. G1
- C. S
- D. G2
Explanation
If the nucleus has 6 picograms of DNA, it suggests that it is in the G2 phase of the cell cycle. This is because during the S phase of interphase, DNA replication occurs, resulting in the doubling of DNA content. Therefore, in the G2 phase, just before mitosis begins, the DNA content is at its peak, having undergone replication.
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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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