Please write clearly in block capitals.
Centre number Candidate number
Surname
For Examiner’s Use
Forename(s)
Question Mark
Candidate signature 1
I declare this is my own work.
2
A-level 3
BIOLOGY 4
5
Paper 2 6
7
8
9
10
TOTAL
Time allowed: 2 hours
Materials
For this paper you must have:
• a ruler with millimetre measurements
• a scientific calculator.
Instructions
• Use black ink or black ball-point pen.
• Fill in the boxes at the top of this page.
• Answer all questions.
• You must answer the questions in the spaces provided. Do not write outside the box around each
page or on blank pages.
• If you need extra space for your answer(s), use the lined pages at the end of this book. Write the
question number against your answer(s).
• Show all your working.
• Do all rough work in this book. Cross through any work you do not want to be marked.
Information
• The marks for the questions are shown in brackets.
• The maximum mark for this paper is 91.
A-level BIOLOGY Paper 2
, 2
Do not write
outside the
box
*JUN217402201* IB/H/Jun21/E14 7402/2
Answer all questions in the
6 spaces provided.
0 1 Describe the process of glycolysis.
.1
IB/H/Jun21/7402/2
, 3
Do not write
outside the
box
0 1
.2
Malonate inhibits a reaction in the Krebs cycle.
Explain why malonate would decrease the uptake of oxygen in a respiring cell.
*02*
Turn over ►
IB/H/Jun21/7402/2
, 4
Do not write
outside the
box
0 2 . 1 Explain how a resting potential is
across the axon membrane in
neurone
maintained a
. [ ]
3mark
s
0 2 . 2 Explain why the speed of transmission of impulses is faster along a myelinated
than
axon along a-myelinated
non axon. [ ]
3mark
s
Question 2 continues on the next
page
IB/H/Jun21/7402/2
Centre number Candidate number
Surname
For Examiner’s Use
Forename(s)
Question Mark
Candidate signature 1
I declare this is my own work.
2
A-level 3
BIOLOGY 4
5
Paper 2 6
7
8
9
10
TOTAL
Time allowed: 2 hours
Materials
For this paper you must have:
• a ruler with millimetre measurements
• a scientific calculator.
Instructions
• Use black ink or black ball-point pen.
• Fill in the boxes at the top of this page.
• Answer all questions.
• You must answer the questions in the spaces provided. Do not write outside the box around each
page or on blank pages.
• If you need extra space for your answer(s), use the lined pages at the end of this book. Write the
question number against your answer(s).
• Show all your working.
• Do all rough work in this book. Cross through any work you do not want to be marked.
Information
• The marks for the questions are shown in brackets.
• The maximum mark for this paper is 91.
A-level BIOLOGY Paper 2
, 2
Do not write
outside the
box
*JUN217402201* IB/H/Jun21/E14 7402/2
Answer all questions in the
6 spaces provided.
0 1 Describe the process of glycolysis.
.1
IB/H/Jun21/7402/2
, 3
Do not write
outside the
box
0 1
.2
Malonate inhibits a reaction in the Krebs cycle.
Explain why malonate would decrease the uptake of oxygen in a respiring cell.
*02*
Turn over ►
IB/H/Jun21/7402/2
, 4
Do not write
outside the
box
0 2 . 1 Explain how a resting potential is
across the axon membrane in
neurone
maintained a
. [ ]
3mark
s
0 2 . 2 Explain why the speed of transmission of impulses is faster along a myelinated
than
axon along a-myelinated
non axon. [ ]
3mark
s
Question 2 continues on the next
page
IB/H/Jun21/7402/2
