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DNA Structure and Replication

DNA Structure and Replication
Which enzyme catalyzes the elongation of DNA molecules?

Helicase
DNA polymerase
Primase
DNA ligase

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DNA Structure and Replication
What does ligase do during replication of DNA?

Joins nicks in DNA strands
Makes copies of mRNA from DNA
Synthesizes the lagging strand
Digests mRNA when it is no longer needed

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DNA Structure and Replication
Overwinding or overtightening of DNA during replication is caused and removed by

Single stranded protein, DNAa
DNAb, gyrase
DNAb, DNA polymerase
DNAa, gyrase

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DNA Structure and Replication
DNA segments capable of moving from one place in the genome to another is known as

introns
moving elements
transposons
retrovirus

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DNA Structure and Replication
What bands will be observed in a cesium chloride gradient after two rounds of replication?

One light and one medium band
One medium band
One medium and one heavy band
One light, one medium and one heavy band

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DNA Structure and Replication
Which of the following are short nucleotides strands made by DNA polymerase working in the opposite direction of the replication fork?

Lagging strand
Okazaki fragments
Primers
Leading strands

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