DNA replication

Question 1

What bond is in a DNA nucleotide?

Answer 1

phosphodiester bond

Question 2

What are the bases of DNA?

Answer 2

Adenine, Thymine, Guanine and Cytosine

Question 3

Definition of semi-conservative?

Answer 3

half of the old strand and half of the new strand

Question 4

Definition of conservative?

Answer 4

one of the genes is the old strand and the other is new strands

Question 5

What is the method for DNA replication?

Answer 5

• the enzyme helicase unwinds the DNA double helix
• DNA polymerase synthesises a new DNA strand in the 5’ to 3’ direction
• another DNA polymerase molecule attaches to the ‘lagging’ strand
• DNA is synthesised in the 5’ to 3’ direction
• helicase continues to unwind the DNA double helix
• continues synthesis and it proceeds on the ‘leading’ strand