Principles of Biology Chapter 5 Questions

Which is NOT a correct association?

• S stage-DNA synthesis

• M stage-mitosis and cytokinesis

• interphase-shortest stage of the cell cycle

• G2 stage-metabolic preparation for mitosis

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Which of the following is the correct sequence for the cell cycle?

• S-M-G1-G2

• S-M-G2-G1

• S-G1-G1-M

• S-G2-M-G1

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During which stage of the cell cycle do the chromosomes duplicate?

• prophase

• interphase

• telophase

• mitosis

Upon examination, a cell is found to have twice as much DNA as the normal diploid state but is no longer in the process of replicating the DNA. All of the DNA is found within a single nucleus. Which stage of the cell cycle is this cell in?

• M phase

• S phase

• G1 phase

• G2 phase

Which of the following proteins would you expect to be coded for by a proto-oncogene?

• a growth factor receptor

• a DNA repair protein

• a protein involved with the G1 checkpoint

• a caspase

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Which type of genes, when abnormally activated so that protein is always present and active, can result in cancer?

• tumor suppressor genes

• proto-oncogenes

• DNA repair protein genes

• executioner caspase genes

If a cell stops at the G1 checkpoint, this is most likely due to what problem?

• The DNA has not finished replicating.

• There is DNA damage.

• The cell is cancerous.

• There is no problem. The cell normally stops at the G1 checkpoint.

Which of the following is not involved in the regulation of the cell cycle?

• cyclins

• internal and external signals

• growth factors

• caspases

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Which of the following statements is NOT true concerning the checkpoints in the cell cycle?

• Checkpoints ensure that damaged DNA is not replicated.

• Checkpoints occur only during mitosis.

• Checkpoints help regulate the progression of the cell cycle.

• Checkpoints can trigger cell cycle arrest if errors are detected.

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Which sequence of stages in mitosis is correct?

• prophase, metaphase, interphase, telophase

• anaphase, interphase, telophase, prophase

• prophase, metaphase, anaphase, telophase

• interphase, metaphase, prophase, anaphase

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