Question

16. Which of the following enzymes adds DNA to the ends or material with duplication? a. Telomerase b. Polymerase d. Primase e. Ligase 1. Which of the following structures indicates where DNA replication begins a. DNA polymerase III b. Replication fork C. Helicase d. Origin of replication e. Centromeres 18. A select mutation is causing a cell lineape to be unable to replicate DNA SUccessfully NA successfully. When observed under a microscope, researchers observe that the DNA is able to be separated, but we template strands keep coming back together before the new strands can be replicated. Base on this observation, which protein involved in DNA replication is most likely mutated a DNA helicase b. DNA polymerase c. DNA primase d. Single-stranded binding proteins to e. RNAS 19. The enzyme responsible for forming the final phosphodiester bond between two DNA fragments during DNA replication a. DNA ligase b. DNA polymerase C. DNA polymerase III d. DNA directed RNA polymerase e. Reverse transcriptase . Which of the following statements best describes the relationship between the nucleotide sequences of the template strand and the nontemplate strand in the DNA of a rene? a. They are identical to each other b. They are parallel to each other c. They are covalently attached to each other us d. They are complimentary to each other e. U in the coding strand is found in place of the T in the non coding strand

Answer 1

16. b) polymerase - During the elongation phase, DNA polymerase adds DNA nucleotides to 3' end of a newly synthesized polymerase strand.

17. d) origin of replication- DNA replication begins at specific locations called origin of replication in the genome.

18. d) singe stranded binding proteins- dna replication mode, ssb proteins binds to newly separated strand which are individual strands and keeps the strand separated by holding them in place and so each strand can serve as template for new dna synthesis. The ssb proteins are mutated that is the reason because the template strands keeps coming back together before new strands are synthesized.

19. a) DNA ligase- they seals the sugar phosphate pieces and catalyzes the formation of phosphodiester bonds to repair broken strands of DNA.

20. d) they are complimentary to each other- The 2 strands of dna are anti-parallel and have complementary base pairs. The non template strand of dna double helix has complementary base pair from template strand.