2019_bio_olevel_nov_paper1

Extracted Content: 2019_bio_olevel_nov_paper1

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Fre Petar

] MBABWE S .
“Al CHOOL EXAMINATIONS COUNCIL

General ti
Certificate of Education Ordinary Le
vel

plOLOGY
pAPER 1 Multiple Choice 4025/1

NOVEMBER 2019 SESSION lh
our

dditional materials:
Multiple Choice answer sheet

Soft clean eraser

A

TIME 1 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.

all questions. For each question there are four

There are forty questions in this paper. Answer
der correct and record your choice in

possible answers, A, B, C and D. Choose the one you consi
soft pencil on the separate answer sheet.

Read very carefully the instructions on the answer sheet.

INFORMATION FOR CANDIDATES

mark. A mark will not be deducted for a wrong answer.

Each correct answer will score one

Any rough working should be done in this booklet.

imbabwe School Examinations council, N201 9.

Copyright: Z

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Productivity in farming can be improved by

A cytology.

B ecology.

Cc biotechnology.

D microbiology.

Cytology isa branch of Biology which deals with
A modification of genes.

B cell structure and function.

Cc classification of animals.

D parts of the body and their function.

Ice protects aquatic life by

A — . allowing light to pass through.

B acting as a conductor of heat.
Cc insulating the water below.
D keeping predators out.

The sub units of genetic molecules are

A amino acids.
B fatty acids.
Cc glucose.

D nucleotides.

The part of a eukaryotic cell that contains DNA is the

A cytoplasm.
B membrane.
Cc nucleus.
D vacuole.

ANIEIT NINDGA

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~

The diagram shows a plant cell

which part, A, B, C or D, controls the turgidity of the cell?

ae

A B Cc D

The sub units of sucrose are

A galactose and fructose.
B galactose and glucose.
C glucose and ribose.

D glucose and fructose.

The diagram shows a transverse section of a dicotyledonous root.

Which tissue, A, B, C or D, is the cortex?

slocated in the form of

In plants, carbohydrates are tran

A maltose.
B glucose.
Cc fructose.
D sucrose.

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ans are caused by

10 Different sized pustules on plant org
A bacterial wilt.
B fungal rust.
Cc sap-sucking pests
D tissue-eating pests. 7
py and fruiting?

‘ - flowerin
. : showing, poo!
Il Which mineral element is deficient 1n plants showing P

A magnesium
B nitrogen
Cc phosphorus

D potassium
i 2
12. Which pair of factors reduces the rate of water loss 1n plants:
A low humidity and high wind speed
B high humidity and low temperature
Cc high temperature and high wind speed
D low humidity and high light intensity
13 Which one is an artificial method of vegetative propagation?
A cuttings
B rhizomes
Cc suckers
D tubers
14 A characteristic of insect pollinated flowers is
dull petals.
feathery stigma.

production of rough pollen grains.
production of large amounts of pollen.

SOm >

4025/1 Non10

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Which diagram. A, B.C or D, st eve to forma clear imave? . Shows how hy

A

16 Durning inhalation,

A chest pressure increases
B chest volume mecreases
c

the nb cage 1s lowered

D the diaphragm relaxes
17 Which animal parasite '

A tape worm

B round worm
Cc tick
D fluke

18 Which hormone ts released when an

A thyroxine
B insulin

Cc glucagon
D adrenaline

2s NDP

116

The drastrams sh th
ts " CW 7 accommodation fl
7 on of light in th
‘ c eve

ght from a near object falls

controlled by dipping )

animal 1s frightened?

on the back of the

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19

20

21

22

Which one ts the site of anacrobre resple

A
B
Cc
D

The diagram shows the cross section of

. sll?
wien ma living, Ce

chloroplast
cytoplasm
mitochondrion
nucleus

a mammalian vessel,

The vessel is

A
B
Cc
D

a capillary.

an artery.

a vein.

a lymph vessel.

What is the action of the extensor and flexor muscles when stretching the arm?

A
B
Cc
D

extensor contracts and flexor contracts
extensor relaxes and flexor relaxes
extensor contracts and flexor relaxes
extensor relaxes and flexor contracts

Which two bones form a ball and socket joint?

SORE

femur and scapula
humerus and scapula
pelvis and humerus
pelvis and tibia

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net

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Which bone is part of the hind limb of a mammal?

tw
ey

A femur
B humerus
Cc radius
D scapula
24 Immunity can be acquired by transmission of antibodies from mother to foetus
Je

This type of immunity is

A natural active.
B natural passive.
Cc artificial active.

D artificial passive.
75 ~The diagram shows recombinant DN A.

Which part, A, B, C or D, represents the vector?

D

26 Bacteriais used in the production of

alcohol.
bread.
penicillin.
yoghurt.

TOS

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29

30

31

32

they
. a ams because 1
Viruses can be classified as living organisms

A excrete.

B feed.

€ reproduce.
D respire.

The full set of genes in an organism is its

A genotype.
B genome.
Cc phenotype.
D alleles.

ven
Which condition is a result of chromosomal mutation -

albinism

Down's syndrome |
haemophilia |
sickle cell anaemia

DIOS

An allele is

a section of DNA coding for a single characteristic.
the set of genes in the nucleus of an individual.

the extemal appearance of an organism.

the alternative form of a gene.

ie n--s

In certain plants, red petals is dominant over white petals. When two heterozygous plants
were crossed, 85 of the plants produced had white petals.

How many plants had red petals?

A 21
B 64
Cc 85
D 255

The allele which influences the appearance of the phenotype even in the presence of an
alternative allele is

dominant.
heterozygous.
homozygous.
recessive.

Sane

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which one is a balanced ecosystem?

33
A orchard
B forest
Cc garden
D pond
44 The diagram shows an organism.

The organism belongs to kingdom

A animalia.
B fungi

Cc plantae.
D protista.

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ve kingdoms: :

fthe fi
35 The diagram shows the ancestty °

—_

ism in ki K iS
An example of an organism In kingdom X

A E. coli. |
B Penicillium.
Cc Plasmodium. '
D Vibrio cholerae.

36 Three living organisms in an ecosystem are represented by the food chain:

grass + caterpillars <strong></strong>_—— > birds
Which pyramid of biomass represents this food chain?

A

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The diagram sho <2 ig ws the carbon cycle.

in “<s

fo sso 3
7

starches fossil fuel
e

consumption
_

What is process X?

A respiration
B transpiration
Cc decomposition

D digestion
38 Which disease is caused by a worm?

A bilharzia

B cholera
C syphilis
D typhoid
39 Which one is a short term effect of drinking alcohol?
A heart disease
B liver cirrhosis
Cc damaged blood vessels
D increased reaction time

40 Drugs used to treat bacterial illnesses are

A antibiotics.

B analgesics.

Cc prophylactics.
D diuretics.

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