steps of dna replication?

Answer 1

1. DNA is unzipped by an enzyme called helicase. (mention that all enzymes end in -ase and that the enzyme responsible for unzipping the DNA is called "helic"ase because it acts on the helical strucute of DNA)

2. The enzyme DNA polymerase moves in and fills in the complimentary sequence of nucleotides on each of the parent strands. (In diagram have students fill in the complimentary nucleotide sequence).

(mention about enzymes)

3. The two developing DNA strands separate into two new DNA strands. (In diagram have students fill in the complimentary sequence of nucleotides).

Answer 2

DNA replication is the "S" phase in the cell cycle, it will be before mitosis and meiosis.

First, the DNA is a double stranded chain, these nucleotide chains are bonded by weak hydrogen bonds. These will be "unzipped" by an enzyme call helicase.

After it is unzipped, another enzyme, DNA polymerase, will attached nucleotides to the corresponding nucleotide

Adenine with Thymine and Cytosine with Guaine

Hopefully, there will be an identical DNA after this process.

Answer 3

helicase unzips it and single stran binding proteins hold it apart. polymerase adds nucleotides in 5 to 3 direction. okazaki framents synthesized on lagging strand

Answer 4

unwinding
stabilise single strand
synthesise new dna
proof reading
ligation