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In the Following Questions, Match the Component of DNA Replication

Question 61

Matching

In the following questions, match the component of DNA replication with its function.

Premises:

Responses:

produces breaks in the DNA molecules and then rejoins the strands to prevent supercoiling

DNA polymerase

prevents the hydrolysis of single DNA strands by nucleases

DNA primase

opens the double helix like a zipper

topoisomerase

prevents formation of hydrogen bonds between complementary base pairs

DNA ligase

catalyzes formation of sugar-phosphate bonds in adjacent Okazaki fragments

DNA helicase

catalyzes a reaction that occurs in the lagging strand but not in the leading strand

single-strand binding protein

adds nucleotides only to the 3' end of an existing polynucleotide strand

joins successive nucleotides to a growing polynucleotide strand, complementary to the template strand

binds DNA at the origin of replication and breaks the hydrogen bonds between the paired bases

catalyzes the synthesis of an RNA primer at both leading and lagging strand

Premises:

produces breaks in the DNA molecules and then rejoins the strands to prevent supercoiling

prevents the hydrolysis of single DNA strands by nucleases

opens the double helix like a zipper

prevents formation of hydrogen bonds between complementary base pairs

catalyzes formation of sugar-phosphate bonds in adjacent Okazaki fragments

catalyzes a reaction that occurs in the lagging strand but not in the leading strand

adds nucleotides only to the 3' end of an existing polynucleotide strand

joins successive nucleotides to a growing polynucleotide strand, complementary to the template strand

binds DNA at the origin of replication and breaks the hydrogen bonds between the paired bases

catalyzes the synthesis of an RNA primer at both leading and lagging strand

Responses:

DNA polymerase

DNA primase

topoisomerase

DNA ligase

DNA helicase

single-strand binding protein

Correct Answer:

Premises:

Responses:

produces breaks in the DNA molecules and then rejoins the strands to prevent supercoiling

prevents the hydrolysis of single DNA strands by nucleases

opens the double helix like a zipper

prevents formation of hydrogen bonds between complementary base pairs

catalyzes formation of sugar-phosphate bonds in adjacent Okazaki fragments

catalyzes a reaction that occurs in the lagging strand but not in the leading strand

adds nucleotides only to the 3' end of an existing polynucleotide strand

joins successive nucleotides to a growing polynucleotide strand, complementary to the template strand

binds DNA at the origin of replication and breaks the hydrogen bonds between the paired bases

catalyzes the synthesis of an RNA primer at both leading and lagging strand

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