biology

1. what is a description of excretion?
a_ achemical reaction that releases energy
b  apermanent increase in size and dry mass
c_ removal of waste products of metabolism
d taking in materials for energy, growth and development

2 the scientific name for a domestic horse is equus caballus.
which row shows the two parts of the name using the binomial system?
[ews [cabo
a kingdom species
b species genus
cc genus kingdom
d genus species

3 the diagram shows a type of plant cell.

nucleus
cytoplasm
cell wall
vacuole

where does this type of cell come from?

a root

b_ cuticle

c_palisade mesophyll

d_ spongy mesophyll

4 what is the formula for calculating magnification?

actual size

a, __-
image size

b_ actual size x image size
image size

g aes
actual size

d_ image size x actual size

5 the diagram represents a substance moving across a cell membrane, using energy from
respiration.
cell membrane : cytoplasm
sn! ytop
a |
a oo o
oo im ooo oo
: oo oo
i a
substance 7
which method of transport does the diagram represent?
a active transport
b_ diffusion
c_ evaporation
d_ osmosis

6 which food-testing reagent shows a positive result when it turns from blue to purple?
a_ benedict’s solution
b _ biuret
c_ ethanol
d iodine solution

7 what are the characteristics of an enzyme?
| | seaas |s | eet
as the substrate reaction
a no no yes
b no yes no
cc yes yes no
d yes no yes

8 an enzyme in potato cells causes oxygen to be produced from the breakdown of

hydrogen peroxide.
cubes of potato tissue were placed in a hydrogen peroxide solution at different temperatures.
the number of bubbles of oxygen released per minute was counted at each temperature.
the table shows the results.

number of bubbles of oxygen 82 36 1

released per minute
the results suggest the optimum temperature for the enzyme is between which two values?
a 15°c and 35°c
b 35°c and 45°c
c 35°c and 55°c
d 45°c and 55°c

9 which molecules contain nitrogen?
a amino acids
b fats
c_ glucose
d starch

10 the photomicrograph shows the lower surface of a leaf.
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~. sps > we ys ae ‘eal
aed eo fa ne “= e xx
gl ser wt 7s
> a4 op c= es ps
azactry ling
which part of the leaf is labelled x?
a guard cell
b _palisade cell
c_ stoma
d_ xylem vessel

11 which row shows the correct enzyme, its substrate and the site of enzyme action in the
alimentary canal?
site of
enzyme substrate ‘
enzyme action
a amylase starch colon
b lipase fatty acid duodenum
cc maltase maltose ileum epithelium
d trypsin protein stomach

12 a student set up the experiment shown in the diagram on a hot and dry day. the air bubble
moved towards the leafy shoot by 30mm in 1 hour.
reservoir
leafy of water
shoot
scale
air capillary
bubble tube
the student was asked to predict and explain the result that would have been obtained on a hot
and humid day.
which row is correct?
dicnanee explanation
moved/mm p
a 15 water evaporates more quickly in humid air
b 15 water evaporates more slowly in humid air
cc 45 water evaporates more quickly in humid air
d 45 water evaporates more slowly in humid air

13 which statement describes the process of translocation?
a_ the movement of sucrose and amino acids in the xylem from the source to the sink
b the movement of sucrose and water in the phloem from the sink to the source
c_ the movement of sucrose and amino acids in the phloem from the source to the sink
d the movement of water and amino acids in the xylem from the source to the sink

14 the diagram shows the human heart.
xx
= — c 4
zz y
what are the semilunar valves?
a wandx b wandz c xandy d yandz

15 which component of the blood transports hormones?
a plasma
b platelets
cred blood cells
d_ white blood cells

16 during the process of vaccination, what stimulates an immune response?
a antibodies
b_antigens
c lymphocytes
d_ phagocytes

17 muscles are responsible for the ventilation of the lungs during breathing.
which row describes their action during the inspiration of air?
diaphragm external internal
muscles intercostal muscles | intercostal muscles

a contract contract relax

b contract relax contract

cc relax contract relax

d relax relax contract

18 which molecule is a product of anaerobic respiration in yeast?
a c2hsoh b  cghi20¢6 c h,0 d oq

19 inakidney nephron, which substances are filtered out of the blood in the glomerulus?
a glucose, protein, ions and water
b_ glucose, protein, urea and water
c glucose, ions, urea and water
d ions, urea and water only

20 how many types of cone cells are there in the human eye?
a 1 b 2 cc 3 d 4

21 the diagram shows a plant shoot growing towards the light.
4 k <— light
l
m
which row describes where auxin is produced, and which side of the shoot has the lowest
concentration of auxin?
the side of the
where auxin shoot with the
is produced lowest auxin
concentration
a k j
b k l
cc m j
d m l

22 which statement about antibiotics is correct?
a_ antibiotics are produced by memory cells.
b_ antibiotics are used to treat rickets.
c_ antibiotics are used to treat viral infections.
d_ antibiotics should only be used when essential.

23 the diagram shows a strawberry plant.
which labelled part of the plant can only be produced by asexual reproduction?
a
se,
one)
vj b ie d
ee () y
w/o
a

24 which part of a flower can contain a pollen tube?
a anther
b filament
c_ stamen
dstyle

25 to avoid extinction of rare plant species, a botanical garden keeps a collection of seeds known
as a seed bank.
which condition will prevent these seeds germinating while they are in storage?
a high humidity
b high oxygen levels
c low light intensity
d low temperature

26 the graph shows the changes to the thickness of the lining of the uterus during the menstrual
cycle.
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ickness a
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0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
day of the menstrual cycle
which hormone is responsible for the change to the thickness of the lining of the uterus shown
between days 5 and 16?
a fsh
b lh
c_ oestrogen
d progesterone

27 which hormone concentrations are high during pregnancy?
[ft estosen | roaesorone

a no no yes

b yes no no

cc no yes yes

d yes yes no

28 by which route would an hiv infection not be transmissible?
a blood
b .ssaliva
c sharing needles for injections
d semen

29 which description of a human gamete is correct?
a adiploid cell with 23 chromosomes
b_adiploid cell with 46 chromosomes
ca haploid cell with 23 chromosomes
d_ ahaploid cell with 46 chromosomes

30 which statements about meiosis are correct?
produces involved in the
genetically production of
identical cells gametes

a yes no

b yes yes

cc no yes

d no no

31 a female parent who is heterozygous for red-green colour blindness has a female child with a
red-green colour-blind male parent.
what is the chance of the female child being colour-blind?
a 0% b 25% cc 50% d 100%

32 a pure-breeding plant with smooth stems was crossed with a heterozygous plant with hairy
stems.
what will be the ratio of hairy to smooth stems in the resulting plants?
a 1 hairy: 1 smooth
bs 1 hairy: 3 smooth
c  3hairy:1 smooth
d_allhairy

33 which row shows the adaptive features of a xerophyte?
[me pama | a [ae
a yes yes no no
b yes no yes no
cc no yes no yes
d no no yes yes

34 the diagram shows a marine food web.
phytoplankton ——-» zooplankton ——» cod ——» harbour seal
nn shrimp ——» mackerel
at which trophic levels is the cod found?
a primary consumer and secondary consumer
b_ secondary consumer and tertiary consumer
c secondary consumer only
d tertiary consumer only

35 the diagram shows part of the carbon cycle.
which labelled arrow would have the balanced chemical equation
6co2z + 6h2o0 — cghi20g + 602?
a
fossil fuels - c
d ;

36 which statement explains why there is a lag phase in a population graph?
a the build-up of waste products limits population growth.
b_ the low population size limits the birth rate.
c_ the number of births is equal to the number of deaths.
d the number of deaths is greater than the number of births.

37 the flow chart describes the process of eutrophication.
step x
increased growth of producers
increased decomposition after death of producers
step y
death of organisms in water
what should be at step x and step y in the flow chart?
ee ee
a decrease in nitrate decreased dissolved
ion concentration oxygen concentration
b increase in nitrate decreased dissolved
ion concentration oxygen concentration
cc decrease in nitrate increased dissolved
ion concentration oxygen concentration
d increase in nitrate increased dissolved
ion concentration oxygen concentration

38 how can fish stocks be conserved?
a_ closed seasons
b_ decreased mesh size
c_ increased quotas
d_ reduction in protected areas

39 penicillin is produced in a fermenter by growing the fungus penicillium. the graph shows how the
mass of living penicillium fungus and the concentration of penicillin change over time.
concentration _!
mass of living :
penicillium mass concentration
fungus of penicillin
0 1 2 3 4 5
time /days
when is the best time to collect the penicillin?
a at 1.5 days
bat 3.0 days
c at3.5 days
dat 5.0 days

40 which enzymes are required to produce human proteins, using genetic modification?
' to forma to isolate the dna
to cut the bacterial : ;
f recombinant making up the
plasmid dna ‘
plasmid human gene
a dna ligase restriction enzymes dna ligase
b dna ligase restriction enzymes | restriction enzymes
c | restriction enzymes dna ligase restriction enzymes
d | restriction enzymes dna ligase dna ligase

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