You are studying DNA replication using a strain of yeast whose DNA polymerase is reported to have an error rate of 10^-⁶ bases per cell cycle.However,your analyses of DNA sequences after DNA replication indicate that the error rate is closer to 10^-¹⁰.What may explain your results? A) The yeast expresses high levels of DNA ligase. B) The yeast has a mismatch repair system. C) RNA polymerase has high fidelity. D) The DNA polymerase can tolerate high temperatures. E) The DNA polymerase is processive.

Question

Quizplus · Accepted Answer

The fact that the observed error rate is much lower than the reported error rate suggests that the yeast has a mismatch repair system that corrects errors made by the DNA polymerase.

You Are Studying DNA Replication Using a Strain of Yeast