Practice Quiz-3 PDF

Practice Quiz- 3 1. A replicon consists off a) One replication origin and one replication fork b) Multiple replication origins and two replication forks c) One replication origin and two replication forks d) One replication origin and multiple replication forks 2. Which is not a requirement for...

Practice Quiz- 3 1. A replicon consists off a) One replication origin and one replication fork b) Multiple replication origins and two replication forks c) One replication origin and two replication forks d) One replication origin and multiple replication forks 2. Which is not a requirement for DNA replication? a) Primer b) Ready supply of amino acids c) Template d) Ready supply of dNTPs e) None of the above 3. DNA synthesis occurs from 5’ to 3’ direction, therefore the template strand will be a) 5’ to 3’ b) 3’ to 5’ 4. What activity of DNA polymerase I is responsible for the removal and replacement of the RNA primer? a) 3’ to 5’ exonuclease b) 3’ to 5’ polymerase c) 5’ to 3’ polymerase d) Primase e) 5’ to 3’ exonuclease 5. Okazaki fragments a) are synthesized by primase b) are formed in the lagging strand c) remove the primer d) are formed in the leading strand e) add nucleotides to the elongating DNA 6. What is the function of DNA polymerase III a) It adds nucleotide pairs to the growing DNA strand b) It adds single nucleotides to the growing DNA strand c) It unwinds the DNA d) It attaches the RNA primers to the DNA strand e) It adds nucleotide pairs to the growing RNA strand 7. Which of the following must happen first in order for DNA replication to occur? a) DNA polymerase binds to the leading strand b) DNA is unwound c) Hydrogen bonds form between bases d) Chromosomes condense e) Breakdown of one DNA strand 8. Which of the following is required for DNA replication to occur? a) DNA helicase b) DNA ligase c) DNA polymerase d) Gyrase e) All of these 9. What is the function of 3’ to 5’ exonuclease activities in DNA polymerase? a) DNA break repair b) Removal of Okazaki fragments c) Proof-reading of RNA primers d) Proof-reading of the nascent DNA e) All of the above 10. During replication, what enzyme adds complimentary bases? a) helicase b) synthase c) ligase d) replicase e) polymerase 11. True/Falls In a replication bubble the same parental DNA strand serves as the template strand for the synthesis of both the leading and lagging strands. a) True b) Falls 12. DNA gyrase is a/an a) Antibiotic resistance gene b) DNA polymerase c) Topoisomerase d) All of the above e) None of the above