The cell cycle and mitosis Quiz
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5 questions, one answer each
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1. A cell has 12 chromosomes in G1. How many chromatids does it have at metaphase?
- A. 6
- B. 12
- C. 24
- D. 48
2. In which stage do sister chromatids move to opposite poles?
- A. Prophase
- B. Metaphase
- C. Anaphase
- D. Telophase
3. In a root tip squash, 30 of 250 cells are in mitosis. What is the mitotic index?
- A. 0.12
- B. 0.14
- C. 8.3
- D. 0.88
4. What is the main purpose of squashing the stained root tip?
- A. To kill the cells
- B. To spread the cells into a thin layer so light passes through
- C. To make the chromosomes divide
- D. To dissolve the cell walls
5. A drug stops DNA replication in S phase. Why would the cell then be unable to divide correctly?
- A. The spindle could not form
- B. The nuclear envelope would not break down
- C. There would be no sister chromatids to share out, so daughter cells would not each receive a full copy of the DNA
- D. Cytokinesis would produce four cells