2018_bio_olevel_nov_paper1

Extracted Content: 2018_bio_olevel_nov_paper1

Page 1

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For Pertermance Mera

JIMBABWE SCHOOL EXAMINATIONS COUNCIL

General Certificate of Education Ordinary Level

BIOLOGY 4025/1

»APER | Multiple Choice
NOVEMBER 2018 SESSION 1 hour

dditional materials:

Multiple choice answer sheet

Soft clean eraser

Soft pencil (type B or HB is recommended)

,

1 hour
RUCTIONS TO CANDIDATES
t open this booklet until you are told to do so.

your name, centre number and candidate number on the answer sheet in the spaces
led unless this has already been done for you.

are forty questions in this paper. Answer all questions. For each question there are
ossible answers, A, B, C and D. Choose the one you consider correct and record your choice in soft
‘on the separate answer sheet.
very carefully the instructions on the answer sheet.
YRMATION FOR CANDIDATES

sorrect answer will score one mark. A mark will not be deducted for a wrong answer.

ough working should be done in this booklet.

cNDoIg Copyright: Zimbabwe School Examinations Council, N2018.

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The : ; study Of body parts and their functions is called

A anthropology.
B Osteology.

c Cytology.

D

physiology.

What is the function of glucose in living organisms?

a storage compound

B structural material

c Tespiratory substrate
D growth material

An example of a disaccharide is

A cellulose.
B galactose.
Cc maltose.
D starch.

Which cell changes shape to perform its function?

A neurone

B lymphocyte
Cc phagocyte
D erythrocyte

Which branch of Biology involves the production of genetically engineered organisms?

A mycology

B biotechnology
Cc cytology

D microbiology

A root hair cell is specialized for its function in that it

lacks a nucleus.

lacks mitochondria.

has a large surface area.
has numerous chloroplasts.

SAWS

4025/1 N2018

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10

F : 5
ide 1 pimals?
Which poly saccharide 1s stored in anima

A cellulose
B chitin
Cc glycogen
D starch

The diagram shows the structure of a plant cell.

In which part, A, B, C or D, is the most energy produced?
i A, B,

f
af lal
oll

OS

G)
- C)
§
g

Which enzyme, in a bio-detergent, would remove a fatty stain?

A amylase
B cellulase
Cc lipase

D protease

Which one is an adaptation of a leaf for photosynthesis?

shiny surface
presence of stomata
presence of hairs
waxy cuticle

SaAw>

4025/1 N2018

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VW

12

13

14

Which clem i 2
ent is essential for osmotic balance in plants?

A calcium

B nitrogen

Cc Phosphorus
D potassium

Which factor reduces plant productivity?

A high light intensity

B low water availability

Cc presence of mineral ions

D absence of pests and diseases

Which plant tissue is responsible for translocation?

A cortex

B epidermis
Cc phloem

D xylem

Which feature of a leaf minimises water loss?

A large surface area
B presence of hairs
Cc thin leaf blade

D thin waxy cuticle

Which plant can be propagated by thizomes?

A banana

B runner grass
Cc sugar cane
D sweet potato

4025/1 N2018

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am shows a section through a flower. er

16 The dia —
1 D, represents pollination?
Which arrow. A. B, C0
B
A
17 Which disease is a result of iron deficiency?
A scurvy
B rickets
C kwashiokor
D anaemia

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138 The dia jagram shoy di WS amodcl of t 1 A 1 he chest organs illustrating breathi ng mec! hanism.

glass tube

balloon
bell jar

plastic diaphragm

What is the effect of pulling the plastic diaphragm downwards?

Air moves into the balloons.
Air moves out of the balloons.
Air moves into the bell jar.
Air moves out of the bell jar.

SAWP,

19 What are the by-products of anaerobic respiration. in plants?
de and lactic acid
carbon dioxide and water vapour
ethanol and carbon dioxide
ethanol and water vapour

carbon dioxi

Saye

4025/1 N2018

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i art. he diagram isa model mammalian he he

20 —
° resents the pulmonary vein!
which part. A. B C, or D, rep
B
Cc
D
A
21 Which component of blood is responsible for clotting?
A plasma
B platelets
Cc red blood cells
D white blood cells

be
Ne

The diagram shows the structure of a sperm.

Which part, A, B, C, or D, is responsible for mobility?

4025/1 N2018

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Mt

th

Which hormone
© IS Secreted in response to low blood gl
—_ glucose level?
eluc agon
insulin
oestrogen

ema a

benefit of rec f
Sit Of recombi y at o
binant DNA technology is the product on
5)

bread.
cheese.
insulin.
yoghurt.

IAW,

The rord tha CS
w 1. describe rat sm iS
s the observable characteristics of an organism i

A allele.

B chromosome.
C genotype.
D phenotype.

Tw ents
o parents are heterozygous for albinism.

Whatis a
That is the probability of the parents. producing an albino child?

)
a

a
9

tab
OW

a
a

0%

BTOwE
So

1

Down's syndrome is caused by

A carcinogens.

B radiation.

Cc gene mutation.

D chromosome mutation.

Which statement is correct about discontinuous variation?
results from effects of genes only

it has many intermediates

gives a normal distribution

results from effects of the environment

SAWS

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gdom does the organism shown belong to?

29 which kin
A plantac
B prokaryotae
Cc fungi /
D animalia
30 The diagram shows reproduction stages in amoeba.

®
@ nucleus
divides

@
<<
cytoplasm
® divides

What type of reproduction is shown?

Je ©

cells seperate

spore production
binary fission
budding

meiosis

SASS

4025/1 N2018

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3

33

34

In Which orp; isms ar, erih
Organisms are Cees fertilised externally?

A birds

B reptiles

Cc Mammals
D amphibians

An Organism which digests dead Organic matter belongs to the kingdom

A animalia.
B fungi.

Cc plantac.

D Protoctista,

An ecosystem is the

place where an organism lives.

organisms which live in a particular habitat.

level in a food chain at which an organism feeds.
interdependence of living organism and their environment.

STOW P>

. >
Which one is a physical component of an ecosystem?

A bacteria

B nematodes
Cc termites

D water.

4025/1 N2018

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35

37

The dia

‘ s
gram shows a food wet

vulture
lion
hyena
cattle
man
cabbage

Which organism has the highest amount of energy?

A

B
Cc
D

What is the effect of exceeding the carrying capacity of |

oid

Which method is effective in destroying mosquitoes at the larval sta

Sany

cabbage
cattle
lion
vulture

and?

soil erosion

increased birth rate

high productivity
increased species diversity

burning mosquito coils
killing by hand

spreading oil on water
using mosquito repellents

4025/1 N2018

ge of development?

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38 Use of pr phy lactic drugs is one method o

f preventing

A bilharzia,

cholera.
Cc malaria,
D typhoid.

39 The organism that causes cholera is a

A bacterium.
B fungus.
Cc protozoan.
D worm.

40 Typhoid is transmitted by

Sexual contact.

droplet infection,

sharing bath towels,
drinking contaminated water.

SaAm>

4025/1 N2018

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