Please write clearly in block capitals.
A-level
Centre Candidate
BIOLOGY
number number
Paper 2
Surname
Forename(s)
Candidate re Time allowed: 2 hours
signatu
Materials
For Examiner’s Use
For this paper you must have:
a ruler with millimetre measurements Questio Mark
a scientific calculator. n
1
Instructions 2
Use black ink or black ball-point pen. 3
Fill in the boxes at the top of this page.
4
Answer all questions.
You must answer the questions in the spaces provided. Do 5
not write outside the box around each page or on blank 6
pages.
7
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 8
answer(s). 9
Show all your working. 10
Do all rough work in this book. Cross through any work you do
not want to be marked. TOTAL
Information
The marks for the questions are shown in brackets.
The maximum mark for this paper is 91.
*jun227402201*
IB/M/Jun22/ 7402/2
E12
, 2
Do not
write
Answer all questions in the spaces box
provided.
0 1 .1 In the following passage the numbered spaces can be filled with biological
terms.
During photosynthesis, plants produce (1) compounds which
contain carbon, such as carbohydrates, lipids and proteins. Most of the
sugars synthesised by plants are used by the plant in (2) .
The rest are used to make other groups of biological molecules. These
biological molecules form the biomass of the plants. Biomass can be
measured in terms of mass of (3) per given area per given
time. The chemical energy store in dry biomass can be estimated
using (4) .
Write the correct biological term beside each number below, that
matches the space in the passage.
[2 marks]
(1)
(2)
(3)
(4)
*02
IB/M/
*
, 3
Do not
write
0 1 .2 Describe the light-independent reaction of box
photosynthesis. [6
marks]
8
Turn over ►
*03
IB/M/
*
, 4
Do not
write
0 2 .1 Put a tick ( ) in the box next to the equation that shows how the net box
production of consumers, N, can be calculated where
I represents the chemical energy store in ingested food
F represents the chemical energy lost to the environment in faeces and
urine
R represents the respiratory losses to the environment.
[1 mark]
N = (I – F) + R
N = I – (F + R)
N = I + (F + R)
N = I – (F – R)
In the UK, some female cattle are only used for breeding. This female
breeding herd has dairy cows and beef cows.
Table 1 shows data on dairy cows and beef cows in the UK female
breeding herd in December 2013 and December 2017.
Table 1
Total number in Percentage of total
Date female breeding female breeding herd
herd / millions Dairy cows Beef cows
December 3.3 54 46
2013 5
December 3.4 55 45
2017 5
*04
IB/M/
*
A-level
Centre Candidate
BIOLOGY
number number
Paper 2
Surname
Forename(s)
Candidate re Time allowed: 2 hours
signatu
Materials
For Examiner’s Use
For this paper you must have:
a ruler with millimetre measurements Questio Mark
a scientific calculator. n
1
Instructions 2
Use black ink or black ball-point pen. 3
Fill in the boxes at the top of this page.
4
Answer all questions.
You must answer the questions in the spaces provided. Do 5
not write outside the box around each page or on blank 6
pages.
7
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 8
answer(s). 9
Show all your working. 10
Do all rough work in this book. Cross through any work you do
not want to be marked. TOTAL
Information
The marks for the questions are shown in brackets.
The maximum mark for this paper is 91.
*jun227402201*
IB/M/Jun22/ 7402/2
E12
, 2
Do not
write
Answer all questions in the spaces box
provided.
0 1 .1 In the following passage the numbered spaces can be filled with biological
terms.
During photosynthesis, plants produce (1) compounds which
contain carbon, such as carbohydrates, lipids and proteins. Most of the
sugars synthesised by plants are used by the plant in (2) .
The rest are used to make other groups of biological molecules. These
biological molecules form the biomass of the plants. Biomass can be
measured in terms of mass of (3) per given area per given
time. The chemical energy store in dry biomass can be estimated
using (4) .
Write the correct biological term beside each number below, that
matches the space in the passage.
[2 marks]
(1)
(2)
(3)
(4)
*02
IB/M/
*
, 3
Do not
write
0 1 .2 Describe the light-independent reaction of box
photosynthesis. [6
marks]
8
Turn over ►
*03
IB/M/
*
, 4
Do not
write
0 2 .1 Put a tick ( ) in the box next to the equation that shows how the net box
production of consumers, N, can be calculated where
I represents the chemical energy store in ingested food
F represents the chemical energy lost to the environment in faeces and
urine
R represents the respiratory losses to the environment.
[1 mark]
N = (I – F) + R
N = I – (F + R)
N = I + (F + R)
N = I – (F – R)
In the UK, some female cattle are only used for breeding. This female
breeding herd has dairy cows and beef cows.
Table 1 shows data on dairy cows and beef cows in the UK female
breeding herd in December 2013 and December 2017.
Table 1
Total number in Percentage of total
Date female breeding female breeding herd
herd / millions Dairy cows Beef cows
December 3.3 54 46
2013 5
December 3.4 55 45
2017 5
*04
IB/M/
*
