Lesson 4 and 5 quiz

What process is responsible for duplicating chromosomes in a cell?

• Photosynthesis

• DNA replication

• Cellular respiration

• Translation

Which protein is known to correct errors that occur during DNA replication?

• Hemoglobin

• p53

• Insulin

• Myosin

What increases the number of cellular divisions in an individual?

• Shorter lifespan

• Taller height

• Lower metabolism

• Less sleep

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What is a possible consequence of increased cellular divisions?

• Decreased energy

• More chances for mutations

• Improved immunity

• Faster healing

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During which process can mutations occur that may lead to cancer?

• Protein synthesis

• DNA replication

• Photosynthesis

• Cellular respiration

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Which of the following best describes the role of p53 in the cell?

• It provides energy for the cell

• It corrects errors during DNA replication

• It transports oxygen

• It digests waste

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Why might taller individuals have a higher risk of mutations in their cells?

• They have fewer cells

• Their cells divide more often

• They have more p53 proteins

• Their cells do not replicate

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Explain why not all versions of p53 are equally effective at correcting DNA replication errors.

• Some versions are mutated and do not function properly

• All versions are identical

• p53 is not involved in error correction

• Only cancer cells have p53

If a person lives longer, what is the likely effect on the number of cellular divisions in their body?

• The number decreases

• The number stays the same

• The number increases

• There is no effect

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Which of the following best explains why mutations are more likely as the number of cell divisions increases?

• Each division is perfect

• More divisions mean more opportunities for errors

• Fewer cells are produced

• DNA replication stops

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