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DNA Structure and Replication

DNA Structure and Replication
In DNA, guanine pairs with

Adenine
Uracil
Cytosine
Thymine

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DNA Structure and Replication
The role of primase is to

proofread base pairing
synthesize an RNA primer to begin the elongation process
dismantle RNA primer
cleave and unwinds short sections of DNA ahead of the replication fork

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DNA Structure and Replication
In an agarose gel, DNA is moving from

anode to cathode
left to right
A to B
cathode to anode

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

DNA ligase
DNA polymerase
Primase
Helicase

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DNA Structure and Replication
E.coli DNA polymerases II and III lack

5' → 3' exonuclease activity
5' → 3' endonuclease activity
partially 5' → 3' endonuclease activity
partially 5' → 3' exonuclease activity

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

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

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