IGCSE Combined and Co-ordinated Sciences Past Papers by Topics
B1 - Cells
1
2
Which statement about cells is correct?
A
Cell membranes are found only in animal cells.
B
Cell membranes are found only in plant cells.
C
Cell walls are found only in animal cells.
D
Cell walls are found only in plant cells.
The diagram shows parts of a mesophyll cell.
What will be found in the part labelled X?
4
A
chloroplasts and nucleus
B
chloroplasts only
C
nucleus only
D
watery solution
X
Which rows correctly match characteristics of living things with their descriptions?
A
characteristic
description
1
excretion
removing the waste products of metabolism
2
growth
making more living things of the same type
3
nutrition
taking in or producing food
4
respiration
obtaining energy from food
1, 2 and 4
B
1, 3 and 4
C
1 and 3 only
collected and classified by KhanhEdu
D
2 and 4 only
5
The diagram shows two different cells.
Which feature do they both have?
6
A
cell membrane
B
cell wall
C
central vacuole
D
chloroplasts
The Venus fly trap is a plant that catches insects.
Which characteristic is shown in the diagram?
7
A
excretion
B
growth
C
reproduction
D
sensitivity
The diagram shows a plant cell.
Which labelled feature would also be found in an animal cell?
A
B
C
D
collected and classified by KhanhEdu
8
9
What is correct for all living organisms?
A
They are sensitive to changes in their environment.
B
They excrete solid waste from their bodies.
C
They feed on other living organisms.
D
They grow larger by increasing their cell number.
The diagram shows a plant cell and an animal cell. The two cells are not drawn to the same
scale.
magnification
×1000
magnification
×2000
The actual height of the animal cell is 0.02 mm.
What is the height of the plant cell?
A
0.01 mm
B
0.02 mm
C
D
0.04 mm
40 mm
10 The diagram shows a palisade cell from a leaf.
Which labelled structure is a membrane?
A
B
D
C
11 What are all living things capable of?
A
excretion
B
digestion
C
photosynthesis
D
sexual reproduction
collected and classified by KhanhEdu
12 The diagram shows two cells.
Which labelled part might contain chloroplasts?
A
C
B
D
13 Which is a characteristic of all living things?
A
a heart
B
breathing
C
excretion
D
sexual reproduction
14 The diagram shows a typical plant cell.
Which row is correct?
cell
membrane
cell wall
cytoplasm
A
X
Y
Z
B
X
Z
Y
C
Z
X
Y
D
Z
Y
X
X
Y
collected and classified by KhanhEdu
Z
13 The diagram shows a plant cell.
X
Y
In which regions of the cell are the chloroplasts and nucleus found?
chloroplasts
nucleus
A
X
X
B
X
Y
C
Y
X
D
Y
Y
14 The plant Mimosa pudica grows in Central and South America. Its leaves close up rapidly when
touched.
Which two characteristics are shown by this action?
A
growth and movement
B
growth and sensitivity
C
movement and sensitivity
D
respiration and growth
15 What is not a characteristic of all living organisms?
A
breathing
B
excretion
C
movement
D
reproduction
16 The diagram shows a section through a cell from a leaf, magnified ×4000. The diameter of the
nucleus in the diagram is 10 mm.
What is the true diameter of the nucleus?
A
0.0025 mm
B
0.0050 mm
C
0.0100 mm
collected and classified by KhanhEdu
D
0.0250 mm
17 All living organisms are capable of
A
asexual reproduction.
B
excretion.
C
photosynthesis.
D
phototropism.
18 An organism has the ability to break down nutrient molecules to release energy.
What is this process?
A
excretion
B
growth
C
nutrition
D
respiration
19 Which structural feature is found in a plant cell but not in an animal cell?
A
cell membrane
B
cell wall
C
cytoplasm
D
nucleus
20 A seedling is placed with its root horizontal to the ground. Three days later, the root is longer and
curves towards the earth.
Which characteristics of living things does this show?
A
growth, nutrition and movement
B
growth, sensitivity and movement
C
movement, nutrition and respiration
D
nutrition, sensitivity and respiration
collected and classified by KhanhEdu
22 Plants release oxygen as a waste product of photosynthesis.
Which characteristic of living organisms does this demonstrate?
A
excretion
B
growth
C
nutrition
D
reproduction
collected and classified by KhanhEdu
27 One way to test for microscopic life in soil is to see if carbon dioxide is released.
Which characteristic of living things is being tested?
A
growth
B
nutrition
C
reproduction
D
respiration
30 Which statement about animal cells and plant cells is correct?
A
Only animal cells possess cell membranes.
B
Only animal cells possess cell walls.
C
Only plant cells possess cell membranes.
D
Only plant cells possess cell walls.
31 Which term is used to describe the removal of toxic materials from living organisms?
A
excretion
B
nutrition
C
respiration
D
secretion
collected and classified by KhanhEdu
5
The ribs are lowered as we breathe out.
Which characteristic of living organisms does this illustrate?
1
2
A
growth
B
movement
C
respiration
D
sensitivity
Which statement about the characteristics of living organisms is correct?
A
Excretion is the breakdown of molecules to release energy.
B
Nutrition is the removal of excess substances, toxic materials and waste products.
C
Respiration is the taking in of organic substances and mineral ions.
D
Sensitivity is the ability to detect and respond to changes in the environment.
Which characteristic of living organisms involves chemical reactions that break down nutrient
molecules to release energy?
A
excretion
B
nutrition
C
reproduction
D
respiration
2
1
Which process do all living organisms carry out?
A
asexual reproduction
B
excretion
C
ingestion
D
photosynthesis
The diagram shows a section through a cell.
What shows that this is a plant cell?
A
It has a cell membrane.
B
It has a nucleus.
C
It has a permanent vacuole.
D
It has cytoplasm.
4
Why are green plants called producers?
A
They can make oxygen from sunlight.
B
They form organic nutrients from simple substances.
C
They have cells containing chlorophyll.
D
They produce starch from sugar.
1
1
What is respiration?
A
breakdown of food by enzymes in the alimentary canal
B
breathing to supply oxygen to cells
C
release of carbon dioxide from cells
D
release of energy for body activities
2
Which statement about cells is correct?
A
Cell membranes are found only in animal cells.
B
Cell membranes are found only in plant cells.
C
Cell walls are found only in animal cells.
D
Cell walls are found only in plant cells.
The diagram shows a germinating seed in the soil.
Which characteristics of living organisms is the seed demonstrating?
characteristic
growth
sensitivity
A
B
C
D