2019_bio_olevel_mj_paper1

Extracted Content: 2019_bio_olevel_mj_paper1

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ZIMBABWE SCHOOL EXAMINATIONS COUNCIL

General Certificate of Education Ordinary Level

BIOLOGY

4025/1
PAPER 1 Multiple Choice
JUNE 2019 SESSION Thour

Additional materials:
Multiple Choice answer sheet
Soft cleaneraser -
Soft pencil (type B or HB is recommended)
Mathematical tables/ Electronic calculator (optional)

TIME =| hour

INSTRUCTIONS TO CANDIDATES

Do not open this booklet until you are told to do so.

Write your name, Centre number and candidate number on the answer sheet in the spaces provided
unless this has already been done for you.
There are forty questions in this paper. Answer all questions. For each question, there are four
possible answers, A,B,C and D. Choose the one you consider correct and record your choice in soft
pencil on the separate answer sheet.

Read very carefully the instructions on the answer sheet.

INFORMATION FOR CANDIDATES

Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any
tough working should be done in this booklet.

Copyright: Zimbabwe School Examinations Council, J2019,

©ZIMSECJ2019 [Turn over

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The diagram shows a safety sy

oe laboratory:

mbol used in a scict

Yellow

The symbol is a warning against

A

B
Cc
D

fires.
smoke.
radiation.

fans.

2 Which branch of Biology involves the study of cells?

A botany
B anatomy
C ecology
D_ cytology
3 Which carbohydrate is a polysaccharide?
A glucose
B_ maltose
Cs starch
D sucrose

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In photosynthesis, water is used as a

A coolant,
B catalyst.
C_ solvent.

D reagent.

The organelle that contributes to the osmotic properties of a plant cell is the
A cell wall.

B chloroplast.

C cytoplasm.

D_ vacuole.

Which feature of a red blood cell increases its surface area?
A presence of haemoglobin

B absence of a nucleus

C_ thin membrane

D thin cross section

The diagram shows an animal cell.
In which part, A, B, C or D, does aerobic respiration take place?

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10

a)
ZY js not truc:
Which statement about enzymes is

A they are biological catalysts

B they are used up during catalysis

C_ they are substrate specific

D they are protein in nature

Enzyme activity

i romal nstant
A. increases with increase in pH then remams col

i i tant.
B decreases with increase in pH then remains cons

C_ increases with increase in pH then decreases.

D decreases with increase in pH then increases.

The diagram illustrates a mode of action of enzymes.

os
s-E-E=

enzyme - substrate enzyme product

enzyme substrate
complex

This mode of action is called
A activation and binding.

B activation and breakdown.
C_ lock and catalysis.

D lock and key.

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it

13

14

Which factor is
OF is not necessary for the germination of seeds?

A

B

D

light
warmth
ony gen

moisture

The diagram show: i
agrant shows a cross section of a dicotyledonous root.

Which part,

ALB oe :
~ C or D, is responsible for transporting organic molecules?

A
B

Which condition results in rapid transpiration?

A

B
Cc
D

low humidity
low light intensity
low temperature

low wind speed

Which one is an advantage of sexual reproduction?

Ps

a

oo 4

increase in genetic variation
maintenance of desirable characteristics
intense colonisation of an area

reduction in competition with other species

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15 The diagram shows a bean seed cut in half.

In which part, A, B,

Cor D, is food stored?

A

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16 ‘The diagram shows one of the steps in testing a leaf for starch

test tube

liquid x

leaf

What is liquid XK?
A water

B limewater

MZ5IN S219

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17

18

19

i - : thesis
resu {in the rate of photosyn 4
The graph shows resi Its of an investigation onl factors affec g

0,04% COz at 35°C

Cc

Rate of
photosynthesis

“Light intensity
Which factor is limiting the rate of photosynthesis when the curves are flat?
A carbon dioxide
B_ temperature

C light

D_ water

A long term effect on smoking on the respiratory system is
A constriction of bronchioles.

B destruction of alveoli.

C_ increased mucus production.

D paralysis of cilia.

Memory, intelligence and consciousness in the brain is controlled by the
A cerebellum.

B cerebrum.

C_ hypothalamus.

D

medulla oblangata.

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20

21

22

Shortage of vitamin A in the diet leads to
A bleeding under the skin.
B_ formation of soft bones,
C poor healing of wounds.
D

reduced resistance to disease.

Which type of immunity will be acquired through vaccination?

A natural active
B artificial active
C natural passive

D artificial passive

The diagram shows the structure of a tooth.

Which part, A, B. C or D, is the hardest?

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locrine glands. 23 The diagram shows the positions of the human end!

Which hormone is secreted by gland 3?
A thyroxine
adrenaline

testostcrone

v9 AO

glucagon

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24 The diagram shows the growth curve of a rabbit. 3 500:

3 000.

a

00:
Mass in

grams > 000

1 000

500

2 4 6 8 10 2

Age in weeks
Which is the best time to slaughter the rabbit?

6 weeks

A

B_ 8 weeks
C 10 weeks
D

12 weeks

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trual cycle. : . ation most likely to oceur?

sents the menstrua® '
B, C or D, is fertilis

25 The diagram repre:
At which stage, A.

26 Fungi are used in the production of
A yoghurt.
B penicillin.
C_ thyroxine.

D glucagon.

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a7

28.

29

The diag

order
o_ 1
rma
return the
recombinany His 7 oes
DNA to the mM @ hactenum
voli

add msulin vene
to the plasmid to

form recombinant
DNA

use an enzyme
1 Cut open the
plasmud

The correct order of the Slages 1s
A 33332-5441 6
B 132+33-,4 45_,¢6
Cc 3+544-3642_41

D 2-54-5655 4143

The approximate monohy brid ratio is

A wl
Boll
Cc 31
D 4!

A new species arises from an existing species by

A evolution
B_ reproduction.
C selection.

Dvaniation.

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ram shows the ¢
Slages in the Production of insulin by gene technology

use an enzyme

to cut the gene for
tosulin from its,
chromosome

the F. cele bacterrum
accepts the new gene
and starts to produce
tosuliy

in random

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30

31

32

33

s is
only when homozysou

An allele which expresses itself
A. dominant.

B_ homologous.
C_ recessive.
D

codominant.

and his wife has blood group B.

Aman has blood group A
hildren?

Which genotype cannot be inherited by any of their ¢

A iy’
BY?
c rr?

D {1°

In pea plants, the allele for red Mowers is co-dominant with that for white flowers
When heterozygote pea plants self pollinate, they produce,

A red flowered plants and white flowered plants in a ratio of 1:1.

Bred flowered plants and no white flowered plants.

C_ white flowered plants and no red flowered plants.

Dred flowcred plants and white flowered plants in a ratio of 3:1.

A diagnostic feature for the kingdom plantae is the presence of
A cellulose.

B_ cytoplasm.

C mitochondria.
D

nucleus.

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34

w
tn

36

The diagram shows the structure of an organi
anism.

_y Strand of DNA

To which kingdom does the or ganism belong?

A

B

Cc

D

Which one helps improve soil fertility?

A

B
Cc
D

fungi
monera
protista

animalia

locusts
termites
flukes

caterpillars

One harmful human activity on the ecosystem is

applying fertiliser just before it rains.

adding organic matter to the soil.
ploughing along contours.

keeping ground cover.

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37

38

39

40

Which food chain is correct?

peel — ——> lion
A goat ? grass cow

B grass —> cow —? man —> lion
Cc cow —? man ——> hyena — lion
—? vulture

D hyena ——* man —> lion

Analgesic drugs are responsible for
A destroying fungi.

B. killing bacteria.

C_ reducing anxiety.

D suppressing pain.

A degenerative disease is caused by
A malnutrition.

B genetic factors.

C_ infection.

D old age.

Which disease is non-infectious?
A cancer

B_ cholera

C_ tuberculosis

D typhoid

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