DNA

Question 1

Stages of DNA replication

Answer 1

1. The enzyme DNA helicase attaches to the DNA molecule
2. The 2 polynucleotide strands separate from each other
3. Free nucleotides line up with their complementary bases on the DNA strands
4. -DNA polymerase then attaches, moves down the molecule and catalyses the formation of a phosphodiester bond between the activated nucleotides

Question 2

What does DNA helicase do?

Answer 2

Causes the hydrogen bonds between complementary bases to break

Question 3

Difference between activated nucleotides and normal nucleotides

Answer 3

-Activated nucleotides have 3 Phosphate groups
-Normal only have one