bio 30 question is so hard

1.hydrogen bonds form between nucleotide base
2. an enzyme acts like a pair of scissors to break weak hydrogen bonds between the nitrogen bases
3. at the replication fork the dan template strands determine the sequence of the nucleotides that are being replaced.
4. a purine or pyrimidine is inserted on a matching nucleotide of the polynucleotide strand
5. nitrogen bases of the polynucleotide strand separate


the correct sequence of events that occur during DNA replication is

A 3,5,2,1,4
B 3,2,5,4,1
C 2,5,3,4,1
D 2,3,5,1,4


I think it is b