The answer is; DNA helicase
They unzip the double helix into single strands during replication. The unzipping occurs at regions called origins where replication is initiated. The protein breaks the hydrogen bonds (using energy from ATP) between the complimentary bases of the strands hence forming a replication fork.
RR Rr is the punnet square according to this cross.
Answer:
the spreading of something more widely.
Explanation:
The answer is B
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