MMSC490 Exam 2 (100% Correct Answers)

Which eukaryotic DNA polymerase replicates the lagging strand in the 3ʹ to 5ʹ direction? a. α b. γ c. δ d. None of the above; the lagging strand is replicated in the 5ʹ to 3ʹ direction. correct answers d. None of the above; the lagging strand is replicated in the 5ʹ to 3ʹ direction. DNA polymerases can synthesize DNA: a. de novo, by catalyzing the polymerization of free dNTPs. b. by adding dNTPs to complementary dNTPs on a single-stranded DNA. c. by adding dNTPs to a hydroxyl group on the end of a growing polynucleotide chain hydrogen-bonded to a strand of RNA. d. by adding dNTPs to a hydroxyl group on the end of a growing polynucleotide chain hydrogen-bonded to a strand of DNA. correct answers d. by adding dNTPs to a hydroxyl group on the end of a growing polynucleotide chain hydrogen-bonded to a strand of DNA. In addition to synthesizing DNA, DNA polymerase I has a second catalytic activity: it can a. synthesize short RNA sequences. b. synthesize short polypeptide sequences. c. remove RNA primers. d. ligate short segments of DNA together. correct answers c. remove RNA primers. Which eukaryotic DNA polymerase replicates the leading strand in the 5ʹ to 3ʹ direction? a. α b. ε c. δ d. γ correct answers b. ε Free rotation of one cut DNA strand around one uncut strand is the primary function of: a. topoisomerase I. b. topoisomerase II. c. DNA helicase. d. DNA polymerase. correct answers a. topoisomerase I. The function of topoisomerase II is to: a. resolve DNA tangles. b. allow DNA to swivel and unwind. c. allow daughter chr d. all of the above correct answers d. all of the above Autonomously replicating sequences are: a. yeast plasmids. b. yeast telomeres. c. bacterial plasmids.