DNA Structure and Replication

B lagging strands and okazaki fragments c okazaki

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B lagging strands and Okazaki fragments. C Okazaki fragments and RNA primers. D leading strands and RNA primers. E RNA primers and mitochondrial DNA.
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Name: ________________________ ID: A 5 Refer to the list of enzymes below to answer the following questions. The answers may be used once, more than once, or not at all. A. helicase B. nuclease C. ligase D. DNA polymerase I E. primase ____ 32. removes the RNA nucleotides from the primer and adds equivalent DNA nucleotides to the 3' end of Okazaki fragments A A B B C C D D E E ____ 33. separates the DNA strands during replication A A B B C C D D E E ____ 34. covalently connects segments of DNA A A B B C C D D E E ____ 35. synthesizes short segments of RNA A A B B C C D D E E ____ 36. DNA-cutting enzymes used in the repair of DNA damage A A B B C C D D E E ____ 37. The difference between ATP and the nucleoside triphosphates used during DNA synthesis is that A the nucleoside triphosphates have the sugar deoxyribose; ATP has the sugar ribose. B the nucleoside triphosphates have two phosphate groups; ATP has three phosphate groups. C ATP contains three high-energy bonds; the nucleoside triphosphates have two. D ATP is found only in human cells; the nucleoside triphosphates are found in all animal and plant cells. E triphosphate monomers are active in the nucleoside triphosphates, but not in ATP. ____ 38. The Y-shaped structure where the DNA double helix is actively unwound during DNA replication is called the A replication fork. B replication Y. C elongation junction. D unwinding point. E Y junction. ____ 39. The leading and the lagging strands differ in that A the leading strand is synthesized in the same direction as the movement of the replication fork, and the lagging strand is synthesized in the opposite direction. B the leading strand is synthesized by adding nucleotides to the 3' end of the growing strand, and the lagging strand is synthesized by adding nucleotides to the 5' end. C the leading strand is synthesized continuously, whereas the lagging strand is synthesized in short fragments that are ultimately stitched together. D both A and B E both A and C ____ 40. Which of the following best describes the addition of nucleotides to a growing DNA chain? A A nucleoside triphosphate is added to the 5' end of the DNA, releasing a molecule of pyrophosphate. B A nucleoside triphosphate is added to the 3' end of the DNA, releasing a molecule of pyrophosphate. C A nucleoside diphosphate is added to the 5' end of the DNA, releasing a molecule of phosphate. D A nucleoside diphosphate is added to the 3' end of the DNA, releasing a molecule of phosphate. E A nucleoside monophosphate is added to the 3' end of the DNA.
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Name: ________________________ ID: A 6 ____ 41. A new DNA strand elongates only in the 5' to 3' direction because A DNA polymerase begins adding nucleotides at the 5' end of the template.
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