biology

1. some processes carried out by living organisms are listed.
1 egestion
2 excretion
3. reproduction
4 respiration
which processes are carried out by all living organisms?
a 1,2,3and4
b 1, 2 and 3 only
c 2,3 and 4 only
d 3and4 only

2 the scientific name for humans is homo sapiens.
what does homo refer to?
a mammal
b genus
c_ kingdom
d species

3. which row is correct for arthropod classification?
[ae [se [at |
group present body parts of legs
a arachnids no 2 6
b crustaceans yes 3 8
le insects yes a 6
d myriapods no 2 4

4 inamesophyll cell, where are chloroplasts found?
a __ between the cell wall and the cell membrane
b_ inthe cytoplasm
c_ inthe nucleus
din the vacuole

5 the cell shown in the diagram has been magnified 3000 times. the diagram is 21 mm wide.
what is the actual diameter of the cell?
a 21mm
b 2imm
3000
c 21mm ~x 3000
p_ 3000
21mm

6 the diagrams show how a cell appears under the microscope at the start of an experiment and
after it has been placed in a dilute solution of salts for 5 minutes.
start of the after placing ina
experiment dilute solution of salts
which statement explains what happens?
a dissolved salts enter the cell by diffusion.
b_ dissolved salts leave the cell by diffusion.
c water enters the cell by osmosis.
d_ water leaves the cell by osmosis.

7 what causes the diffusion of oxygen into a plant cell?
a active transport
b = movement of molecules
c_ osmosis
d photosynthesis

8 what is the colour change shown by benedict's solution when heated with a reducing sugar?
a blue to purple
b blue to red
c brown to blue-black
dred to yellow

9 the diagram shows the digestive system.
which part absorbs the most water?
es
<
y

wo

d h
es \ 3

c _ [te wr |
| ;

10 the graph shows the effect of temperature on the activity of four different enzymes.
r
q ss}
enzyme
activity p
0 10 20 30 40 50 60 70 80 90 100110
temperature /°c.
which conclusion about the data in the graph is correct?
a enzyme p and enzyme q are both active at 25°c.
b enzyme r and enzyme s are both active at 75°c.
c_ enzyme p has an optimum temperature of 0 °c.
d_ enzyme s has an optimum temperature above 100°c.

11. which colour does hydrogencarbonate indicator turn if the carbon dioxide concentration is
increased?
a green
bred
c violet
d_ yellow

12 the diagram shows a test-tube at the start and at the end of an enzyme experiment.
enzyme + enzyme +
substrate 10 minutes products

set
temperature
35°c
at the end of the experiment, the mixture in the test-tube contains glycerol.
which row correctly identifies the enzyme and the substrate it acts on?
enzyme
acts on
a amylase fat
b amylase glucose
cc lipase fat
d lipase glucose

13 the diagram shows the teeth in the lower jaw of a human.
which tooth is a molar?
b
cc
a curs
£) ch
fs e
(if \ay}—?

14 what is meant by chemical digestion?
a large insoluble molecules are broken down into small soluble molecules.
b_ large soluble molecules are broken down into small insoluble molecules.
c small insoluble molecules are built up into large soluble molecules.
d small soluble molecules are built up into large insoluble molecules.

15 which food is a good source of vitamin c?
a_ bread
b- cheese
c_ chicken
d oranges

16 what is a description of transpiration?
a exchange of gases between the leaf and the atmosphere
b loss of water vapour from the leaves of a plant
c movement of water from the roots to the leaves
d movement of water through the cells of the leaf

17 parts of a plant are listed.
1 mesophyll cells
2 root cortex cells
3 root hair cells
4 xylem vessels
what is the pathway taken by water in the plant?
a 1545253
b 152534
c 3 51>4>2
d 3>52>4>1

18 parts of the human circulatory system are listed.
1 arteries
2 capillaries
3. heart
4 veins
which structures have valves to ensure the one-way flow of blood?
a iand2 b 2and4 c 2and3 d 3and4

19 which type of cells produce antibodies?
a ciliated cells
b platelets
cred blood cells
d_ white blood cells

20 what is an example of a transmissible disease?
a_ coronary heart disease caused by eating a high fat diet
b_ aids
c liver disease caused by excessive alcohol consumption
d_scurvy

21 which table correctly shows the difference in composition of inspired air compared with
expired air?

a b
[tinsoiresair [expres] [| inspired | expired a |
oxygen less more oxygen less more
carbon dioxide less more carbon dioxide more less

cc d
(tins ar [ewredar | [| inspired | ered a
oxygen more less oxygen more less
carbon dioxide less more carbon dioxide more less

22 what is the site of gas exchange in humans?
a nose
b alveoli
c_ bronchus
d_ trachea

23 three statements about anaerobic respiration are listed.
1 in humans, the product is lactic acid.
2 in yeast, the product is lactic acid.
3. it releases more energy per glucose molecule than aerobic respiration.
which statements are correct?
a 1,2and3 b 1tand2only c 1 only d 2and 3 only

24 which organ produces insulin?
a adrenal gland
b | liver
c_oovary
d_ pancreas

25 the diagram shows the human excretory system.
which labelled structure is the urethra?
go
b
| |
d
v

26 the diagrams show three types of neurones.
l
not to
scale
7 c , -
i ay
m
which sequence shows the direction that impulses will travel during a reflex action?
a l>m>n
b m>l->n
c m>nol
d nom>l

27 which part of the eye detects red light?
a cornea
b iris
coptic nerve
d_ retina

28 the diagram shows a human sperm cell.
which structure digests the egg cell membrane?
b cc d
len

29 which diseases can be successfully treated with antibiotics?

diseases diseases

caused by rickets caused by

bacteria viruses
a jv jv jv key
b v x x / =can be treated
cc x v x x = cannot be treated
d x x v

30 some species of plants can reproduce by producing bulbs. the diagram shows a bulb.
, leaves
air
soil h
| bulb
i
roots ) )
the bulb is produced by one parent plant and will grow into a new plant.
which statement about the new plant is correct?
a _litis genetically different from its parent and is produced by asexual reproduction.
b _itis genetically different from its parent and is produced by sexual reproduction.
c_itis genetically identical to its parent and is produced by asexual reproduction.
d_itis genetically identical to its parent and is produced by sexual reproduction.

31 which diagram of the male reproductive system is correctly labelled?
a b
vf n urethra qi n
urethra sperm
sperm duct
duct
scrotum testis
cc d
= urethra =
y \
urethra sperm
sperm duet
duct
prostate
gland
prostate gland

32 what can be used to reduce the transmission of hiv?
[ [sna [ra re]
blood donors | for drug users hands
a v x x x
b x v v x
cc x x v v
d v v x x
key
¥ = can be used to reduce transmission
x = cannot be used to reduce transmission

33 which statement about the human sex chromosomes is correct?
a females have an x chromosome and a y chromosome.
b females have two y chromosomes.
c_ males and females have at least one x chromosome.
d_ males and females have at least one y chromosome.

34 the inheritance of seed colour in pea plants is controlled by a single gene. the allele for yellow
seed colour, y, is dominant. the allele for green seed colour, y, is recessive.
what are the possible genotypes of a pea seed that is yellow?
a yyoryy only
b_ yy, yyoryy
c yyoryy only
d yyoryy only

35 the graph shows the heights of students in a class.
oad ueeturuueeu teed greg ureeeeeeed ceeutgruee0uees
eeeeceeeeeeeeeeeeeeeeeeeee eee eee eeeeee eee
2 ty
5 a a li eeeeeeeeeeeeee eee
eee eee eee eee hee eere eee eee eee
1b<eeeeeeeeeeeeeeeeeeh, © peper
number h h h
eee eee eee eee feuneaaueaueae
of students ec ceee eee ree eer eec cee eee}
10 po er sese ses eee eee
eeeeeeeeeeh hhh mamsetiaiiia
cece eee eee] heel
5-h ee ssaiiites
amit rte
oh lo
be \ \ & \&
pnp pp gp mm kp
we we & s & ss we a &
height/cm
what is a correct statement for these data?
a_ there are two students who are 147 cm tall.
b_ the most frequent height range is 160-164 cm.
c_ the range of student heights measured is 150-174.cm.
d_ there are 72 students in this study.

36 which process decreases the amount of carbon dioxide in the atmosphere?
a combustion
b decomposition
c photosynthesis
d respiration

37 it is estimated that 90% of the energy which flows through living organisms in a food chain is lost
between one trophic level and the next.
the producers in a food chain contain 1000 units of energy.
how many units will reach the quaternary consumers in the food chain?
a 0.1 units
b 1 unit
c 10 units
d100 units

38 what can increase as a result of deforestation?
1 extinctions
2 flooding
3 biodiversity
a 1,2and3 b 1tand2only c ‘1and3only d = 2and3only

39 the diagram shows the position of a farmer’s field near a river.
the farmer uses chemical fertilisers that drain into the river, causing pollution. high concentrations
of the chemical fertiliser result in increased growth of aquatic plants.
at which point is the growth of aquatic plants the least affected by fertilisers?
farmer’s
field =~"
a
cc
b d
al
direction of water flow

40 the diagram shows a food web.
[7
grasshopper
which food chain shows a correct flow of energy through the web?
a_ corn - grasshopper —> hawk => lizard
b_ grass — grasshopper — hawk > rabbit
c grass > rabbit > hawk > flea
d_ corn > grass —> rabbit — hawk

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