DNA replication

Question 1

Why is dna helicase improtant in dna replication?

Answer 1

Dna helicase breaks hydrogen bonds between base pairs

This allowes strands to seperate and the strands act as templates

Question 2

Why is DNA replication described as semi conservative ?

Answer 2

When strands are seperated they are each used as templates.

In the new daughter strands one strand is of original DNA and the other is a new complimentary strand

Question 3

Structure and function of DNA

Answer 3

• Helical shape (compact)
• Complimentary base pairing (hydrogen bonds)
• Large molecule (lots of info)
• Backbone (stability)
• Double stranded (act as template)

Question 4

2 ways the hydrolyos of ATP is usefulnin cells

Answer 4

phopholryation

Quick energy relases for processes like active transport

Question 5

How is DNA replicated? (1)

Answer 5

Dna helicasw separates strand

Question 6

How is DNA replicated? (2)

Answer 6

Free floating nucleotides attach to exposed bases using the complimentary base pairing

Question 7

How is DNA replicated? (3)

Answer 7

Dna polymerase then joins these nucleotides reforming phosphodiester bonds and the backbones of the dna molecules

Question 8

How is DNA replicated? (4)

Answer 8

2 new semi conservative dna molecules are made consisting of one new strand and one original strand