B 3 Lesson 5 quiz

What process is responsible for duplicating chromosomes in a cell?

• Protein synthesis

• DNA replication

• Cell respiration

• Photosynthesis

Which of the following can occur during DNA replication?

• Cell division

• Mutations

• Photosynthesis

• Protein folding

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What is the role of p53 during DNA replication?

• It duplicates chromosomes

• It corrects errors

• It causes mutations

• It produces energy

How do the chromosomes in non-cancer cells compare to each other?

• They are all different

• They are identical

• They are missing

• They are circular

Which statement best describes the chromosomes in cancer cells?

• They are identical to those in non-cancer cells

• They have differences compared to each other

• They are always shorter

• They contain no mutations

If a version of p53 does not function properly, what is a likely consequence during DNA replication?

• All errors are corrected

• More mutations may persist

• Chromosomes will not duplicate

• The cell will stop dividing

Explain why cancer cells might have chromosomes that are different from each other.

• Because they undergo photosynthesis

• Due to uncorrected mutations during DNA replication

• Because they do not replicate DNA

• Because they have no p53 protein

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A scientist observes that two non-cancer cells from the same organism have identical chromosomes. What does this suggest about the DNA replication process in these cells?

• DNA replication introduces many differences

• DNA replication is accurate and errors are corrected

• DNA replication does not occur

• Mutations are always present

Suppose a cell has a faulty version of p53. Predict how this could contribute to the development of cancer.

• The cell will stop replicating DNA

• Errors during DNA replication may not be corrected, leading to mutations that can cause cancer

• The cell will become identical to non-cancer cells

• The cell will produce more energy

A researcher finds that a group of cells has chromosomes with many differences. Using evidence from the text, what might you infer about the function of p53 in these cells?

• p53 is functioning normally and correcting all errors

• p53 is not functioning properly, allowing mutations to accumulate

• The cells are not undergoing DNA replication

• The cells are not cancerous

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