DNA

Question 1

DNA replication

Answer 1

1. DNA Helicase
   Breaks the Hydrogen bonds
   Seperating the two strands
2. DNA Nucleotides
   Free in the Nucleus
   Bind to their complementary bases
3. DNA Polymerase
   Forms phodphodiester bonds between nucleotides on same strand
   Condensation reaction
4. Semi Conservative Replication
   Each DNA molecule has one new and one original strand

Question 2

DNA Base frequencies

Answer 2

Cytosine: 18%
Guanine: 18%
Adenine: 32%
Thymine: 32%

Question 3

Function of RNA

Answer 3

To transfer genetic information from DNA to Ribosomes

Question 4

Nucleotide structure

Answer 4

A phosphate group
|Ester bond
Pentose Sugar
|Glycosidic bond
Nitrogen containing base

Question 5

Double Helix structure

Answer 5

Two Polynucleotide chains
Hydrogen bonds between specific bases