If a prokaryotic cell experienced a mutation that eliminated DNA polymerase's 3' to 5' exonuclease activity, what part of DNA synthesis would be affected?
a. The single-stranded DNA would not remain open.
b. Proofreading would not occur.
c. The lagging strand fragments could not be connected together.
d. The replication fork would be unable to move.
Answer: b. Proofreading would not occur.
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