biology

1. the diagram shows what happened in an experiment with plant seedlings.
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| light | | | light
<———_—_———_ <j
which characteristic of living things made the seedlings grow towards the light?
a excretion
b nutrition
c respiration
d _ sensitivity

2 which structure or substance is found in a plant root?
a dentine
b platelet
c ventricle
d xylem

3. the diagram shows an arthropod.
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which group of arthropods does it belong to?
a arachnids
b_crustaceans
c insects
d ~ myriapods

4 which structure is present in plant cells but absent from bacterial cells?
a cell membrane
bcell wall
c_ cytoplasm
d_ nucleus

5 which cell is adapted for swimming?
a b
ee e @
cc d
t not to
scale

6 apollen grain was viewed with a microscope using *500 magnification.
the image size of the pollen grain was measured as 75mm.
which calculation would give the actual size of the pollen grain in millimetres?
a 7 b 500 c 75x 1000 d 500
500 75 500 75 x 1000

7 which graph represents the effect of increasing temperature on the rate of diffusion?
a b
rate of rate of
diffusion diffusion
temperature temperature
cc d
rate of rate of
diffusion diffusion
temperature temperature

8 which characteristics are correct for both osmosis and diffusion?
require a partially require a are energy-consuming
permeable membrane | concentration gradient processes
a v v x key
b v | x v v =yes
c x v x xx =no
d x x v

9 which row describes active transport?
direction of movement of particles using energy from
through a membrane respiration
a | against the concentration gradient no
b down the concentration gradient yes
cc against the concentration gradient yes
d down the concentration gradient no

10 what is a correct statement about biological molecules?
a biuret reagent is used to test for reducing sugars.
b_ glycogen is made of smaller glycerol molecules.
c_ oils contain the chemical elements carbon, hydrogen, oxygen and nitrogen.
d_ protein is made of smaller amino acid molecules.

11 enzyme x digests starch in the duodenum.
the same volumes of starch suspension and enzyme x were put into four test-tubes, a, b, c and
d. each test-tube was kept at a different ph and temperature, as shown in the table.
in which test-tube will starch digestion be the quickest?
a 2 20
b 2 35
cc 7 20
d 7 35

12 the diagram represents enzyme action in a chemical reaction.
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ww x y

what are parts w, x and y in this chemical reaction?
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a www x ¥

b xx www y

c xx y ww

d y ww x

13 aquatic plants were placed in two test-tubes. each test-tube was sealed to prevent the entry or
exit of gases. one test-tube was kept in the light and one test-tube was kept in the dark.
what needs to be added to the test-tubes to detect any differences in gas exchange?
a_ benedict's solution
b _ biuret reagent
c_hydrogencarbonate indicator
d iodine solution

14 which part of a leaf contains the highest concentration of chloroplasts?
a lower epidermis
b _palisade layer
c upper epidermis
d_ vascular bundle

15 which four organs are part of the digestive system?
a lung, liver, salivary gland, pancreas
b _ kidney, liver, colon, ureter
c pancreas, liver, uterus, gall bladder
d - salivary gland, liver, gall bladder, pancreas

16 what should be increased in the diet of a person suffering from constipation?
a fats
b fibre (roughage)
c_ iron
d protein

17 the diagram shows part of the small intestine and an associated blood vessel.
small blood
intestine vessel
————_ 4 —s
what is represented by the arrow?
a absorption of sugars
b assimilation of sugars
c_ digestion of sugars
d ingestion of sugars

18 the diagram shows the human alimentary canal.
which labelled part absorbs the most water?
b a
cc
b

19 which description of molar teeth is correct?
a pointed teeth used to tear food
b __ sharp-edged teeth to cut food
c teeth with a jagged surface to bite food
d teeth with a large surface to grind food

20 which organs are involved in physical digestion?
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a v v x key
b v x v /¥ =yes
c x v x xx =no
d x x v

21 what is produced by the action of lipase on fats?
1 amino acids
2 fatty acids
3. glycerol
a 1and3 b 1 only c 2and3 d 2only

22 where are most nutrients absorbed in the digestive system?
a colon
b oesophagus
c small intestine
d_ stomach

23 the diagrams show a section through a root and a section through a stem.
1 9 3
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@ d 4
8
root stem
in which tissues are amino acids transported?
a iand3 b 1and4 c 2and3 d 2and4

24 which diagram represents a cell responsible for the transport of oxygen?
a b cc d
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not to
scale

25 transmissible diseases are transmitted when a pathogen is passed from one host to another.
what is an example of direct contact?
a breathing in pathogens
b_ contact with blood or other body fluids
c_ contact with contaminated surfaces
d_ eating or handling contaminated food

26 the diagram shows the breathing system in humans.
which labelled part is surrounded by blood capillaries for gas exchange?
la
d — is
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in ()

u u

27 what are the products of aerobic respiration in plants?
a alcohol and carbon dioxide
b_ carbon dioxide and lactic acid
c_ carbon dioxide and water
d lactic acid only

28 the diagram shows some structures associated with human excretion.
which structure excretes urea?
& ey
| |
c
d

29 which organ secretes insulin and how is it transported?
|| organ that secretes insulin insulin transported by
a adrenal glands blood
b adrenal glands nervous system
c pancreas blood
d pancreas nervous system

30 in an experiment, bacteria were grown on agar. four paper discs, a, b, c and d, were placed on
top of the agar. each paper disc contained a different antibiotic.
the diagram shows the agar after 48 hours. the clear areas show where bacteria are not growing.
which antibiotic are the bacteria most resistant to?
® key
| = area showing
bacterial growth
| = area with no bacteria
© © (a) = paper disc

31 the list shows secondary sexual characteristics.
1 hair grows on the face.
2 hips become wider.
3 voice becomes deeper.
which secondary sexual characteristics are caused by testosterone?
a 1,2and3 b 1tand2only c= 1and3only d 2and3only

32 the diagram shows a flower seen from above.
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use the key to find the name of the family to which it belongs.
2 a scrophulariaceae
3 petals joined c caryophyllaceae

33 which statement about a heterozygous individual is correct?
a is pure-breeding
b has two identical alleles
c_ has a dominant allele and a recessive allele
d_ expresses the recessive allele in its phenotype

34 what is an example of continuous variation?
a_ abo blood groups in humans
b_ body mass in humans
c_ seed shape in pea plants
d seed colour in pea plants

35 a particular animal species only eats plants.
what is a description of this animal species?
a acarnivore
ba primary consumer
c  aproducer
d  asecondary consumer

36 in the carbon cycle, which process uses carbon dioxide?
a combustion
b decomposition
c_ respiration
d photosynthesis

37 which statements about deforestation are correct?
1 deforestation causes an increase in atmospheric carbon dioxide.
2 deforestation causes an increase in biodiversity.
3 deforestation causes an increase in the loss of soil.
a 1 and 2 only b 1and3only c= 2and3only d 3only

38 which two gases enhance the greenhouse effect?
a_ carbon dioxide and methane
b_ carbon dioxide and nitrogen
c_ methane and oxygen
d nitrogen and oxygen

39 which row shows whether the two natural resources are always managed sustainably?
using fish using wood
stocks from forests
a yes yes
b yes no
c no yes
d no no

40 which features make bacteria useful in biotechnology?
features of bacteria
make complex have a rapid
have cell walls :
molecules reproduction rate

a v v x
b v x x
c x v v
d x x v

key

v = feature is useful in biotechnology

x = feature is not useful in biotechnology

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