In a Test Tube, a Particular DNA Polymerase Has an Error

question 50

Multiple Choice

In a test tube, a particular DNA polymerase has an error rate of 1 mistake in every 106 bases copied.Why is the mutation rate in a cell that uses this DNA polymerase much lower?

• A)The polymerase is more careful in replicating regions where genes exist.
• B)Repair mechanisms correct errors made by the polymerase.
• C)Not all mutations can be detected easily.
• D)The DNA polymerase has no proofreading function.
• E)Mutations do not occur if mutagens are not present.

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