DNA Structure

Question 1

How do polynucleotides form?

Answer 1

Nucleotide monomers are joined together with phosphodiester bonds to form polynucleotides

Question 2

How is the phosphodiester bond formed?

Answer 2

The hydroxyl group on the 3rd carbon of one nucleotide reacts with the phosphate group attached to the 5th carbon on another

Question 3

What direction is DNA and RNA synthesised in?

Answer 3

5’ ————> 3’ direction

Question 4

What are the two anti parallel strands in DNA?

Answer 4

5’ ——> 3’ and 3’ ——> 5’

Question 5

Why does you body replicate its DNA?

Answer 5

Because your body needs to make more cells when events such as growth, pregnancy or injury occurs

Question 6

What are the two types of bases found in DNA?

Answer 6

Pyrimidines : C & T , 6 sided bases
Purines: G & A, 5 sided bases joined to 6 sided bases

Question 7

What is semi-conservative replication?

Answer 7

Each DNA strand of the double helix is used as a template strand for the synthesis of two new strands, allows genetic information to be passed onto newly synthesised cells and the next generation