Examine model 2. number the steps below in order to describe the replication of dna in a cell. hydrogen bonds between nucleotides form. hydrogen bonds between nucleotides break. strands of dna separate. free nucleotides are attracted to exposed bases on the loose strands of dna.

1) Hydrogen bonds between nucleotide break
[the enzyme helicase breaks the hydrogen bonds between the 2 adjacent DNA strands first]

2) Strands of DNA separate
[This exposes the template strand used for the synthesis of a new DNA strand]

3) Free nucleotide are attracted to exposed bases on the loose strands of dna
[Free deoxyribonucleotises are recruited to complentary base pair on template strand from 5'to 3'direction by DNA polymerase which reads the template strand from 3'to 5' direction]

4) hydrogen bonds between nucleotide form.
[After new strand of DNA is synthesized, both template strand and new strand annuals by forming hydrogen bonds between each complimentary base pairs, marking the end of DNA replication. ]

aliasger2709 aliasger2709 · Answer 2 · 2022-04-05T15:11:21+02:00

Replication is the central dogma process. First, the hydrogen bond breaks, then DNA strands separate, followed by the addition of nucleotides, and hydrogen bonds.

What is DNA replication?

DNA replication is the process of the central dogma in which the hydrogen bonds present between purine and pyrimidine are broken by the helicase enzyme.

This results in the separation of the DNA strand into the template and other strands. On the loose template strand, free nucleotides are added by complementary base pairing.

When the complementary bases are added and a new DNA strand is synthesized, then hydrogen bonds are added again resulting in a double helix structure.

Therefore, bonds are first broken, and then after nucleotide addition, the bonds are formed again.

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