Mitosis and the cell cycle Quiz
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5 questions, one answer each
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1. In which phase of the cell cycle is DNA replicated?
- A. G2 phase
- B. Prophase
- C. S phase
- D. Anaphase
2. Which event happens in anaphase?
- A. Chromosomes line up on the equator
- B. Centromeres divide and chromatids move to the poles
- C. Nuclear envelopes re-form
- D. Chromosomes condense
3. A student counts 250 cells in a root tip squash and finds 40 in mitosis. What is the mitotic index?
- A. 0.16
- B. 0.20
- C. 0.84
- D. 6.25
4. Why is the root tip warmed in hydrochloric acid before it is squashed?
- A. To stain the chromosomes
- B. To break down the middle lamella so cells separate
- C. To stop the cells from dividing at metaphase only
- D. To increase the rate of mitosis
5. A grower uses runners to produce new strawberry plants. Which statement about the new plants is correct?
- A. They show more variation than plants grown from seed
- B. They are produced by meiosis
- C. They are genetically identical to the parent, so one disease could affect them all
- D. They have half the number of chromosomes of the parent