Question

1. 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.

Explanation:

Step1: DNA replication initiation

DNA helicase breaks hydrogen bonds between nucleotides.

Step2: DNA strand separation

Strands of DNA separate.

Step3: Nucleotide attraction

Free nucleotides are attracted to exposed bases on the loose strands of DNA.

Step4: Hydrogen bond formation

Hydrogen bonds between nucleotides form.

Answer:

1. Hydrogen bonds between nucleotides break.
2. Strands of DNA separate.
3. Free nucleotides are attracted to exposed bases on the loose strands of DNA.
4. Hydrogen bonds between nucleotides form.