Download Ib Biology DNA Replication Questions 1. What is the function of

Ib Biology
1.
DNA Replication Questions
What is the function of helicase?
A.
It forms bonds between DNA nucleotides.
B.
It adds new nucleotides to the DNA helix.
C.
It forms the DNA helix.
D.
It separates DNA strands.
(Total 1 mark)
2.
During the process of replication, which bond(s) in the diagram of DNA below is/are broken?
6
3
4
1
7
2
5
A.
3
B.
4, 5
C.
1, 2, 6, 7
D.
1, 7, 4, 5
(Total 1 mark)
1
3.
The following diagram represents replication in DNA.
A
B
[Freeman, Scott, Biological Science, 1st,  2002. Electronically reproduced by permission of Pearson Education, Inc.,
Upper Saddle River, New Jersey]
(a)
State the name and describe the function for the enzymes labelled A and B on the
diagram.
(i)
(ii)
A:
B:
Name:
..........................................................................................
Function:
..........................................................................................
Name:
..........................................................................................
Function:
..........................................................................................
(2)
(b)
Identify the cellular location of DNA replication in eukaryotic cells.
....................................................................................................................................
(1)
(c)
State at which period during the cell cycle DNA replication occurs.
....................................................................................................................................
(1)
(d)
Explain the significance of complementary base pairing during DNA replication.
....................................................................................................................................
....................................................................................................................................
....................................................................................................................................
....................................................................................................................................
....................................................................................................................................
....................................................................................................................................
(2)
(Total 6 marks)
2