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ZIMSEC O Level · 4003/1 · J2019

Combined Science Paper 1 June 2019

Questions
40
Syllabus code
4003/1

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Questions
40
Pass mark
24
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Answer every question in the printed order, get marked at the end, then see the answers.

The questions

Question 1

Biology
Which nutrient provides energy?
  1. Acarbohydrate
  2. Bvitamin C
  3. Cfibre
  4. Diron

Question 2

Biology
What is the function of the gall bladder?
  1. Astores bile
  2. Bstores urine
  3. Cproduces bile
  4. Dproduces urea

Question 3

Biology

The photograph shows a condition due to malnutrition.

What is the name of the condition?

  1. Aobesity
  2. Bdiabetes
  3. Ckwashiorkor
  4. Danorexia nervosa

Question 4

Biology
Benedict's solution was added to a food sample. The mixture was heated. A brick-red colour was observed.
Which food component was present?
  1. Afat
  2. Bstarch
  3. Cprotein
  4. Dglucose

Question 5

Biology
During anaerobic respiration,
  1. Aoxygen is used.
  2. Balcohol is produced.
  3. Clactic acid is produced in plant cells.
  4. Da large amount of energy is released.

Question 6

Biology

The diagram shows the structure of an alveolus.

Which gas moves in the direction of the arrow?

  1. Acarbon monoxide
  2. Bcarbon dioxide
  3. Cnitrogen
  4. Doxygen

Question 7

Biology

The diagram shows a plant cell after it has been placed in a concentrated salt solution.

Which substance moves in the direction of the arrow?

  1. Asalt
  2. Bions
  3. Cwater
  4. Dcytoplasm

Question 8

Biology

The diagram shows the internal section of a blood vessel.

What is the function of T?

  1. Ato increase blood flow towards the heart
  2. Bto increase the lumen of the blood vessel
  3. Cto push blood towards the heart
  4. Dto prevent back flow of blood

Question 9

Biology
The diagram shows the human circulatory system.
Which blood vessel, A, B, C or D, has blood under highest pressure?
  1. AA
  2. BB
  3. CC
  4. DD

Question 10

Biology
A woman starts her menstrual flow on the 2nd of April.
When is she expected to ovulate?
  1. A7 April
  2. B12 April
  3. C16 April
  4. D2 May

Question 11

Biology
Which part of the male reproductive system stores sperms?
  1. Aprostate gland
  2. Bsperm duct
  3. Cepididymis
  4. Dtestis

Question 12

Biology

The diagram shows the reproductive system of a woman.

What is part S?

  1. Acervix
  2. Bovary
  3. Cuterus
  4. Doviduct

Question 13

Biology
Which disease is spread by drinking contaminated water?
  1. Aebola
  2. Btyphoid
  3. Cmalaria
  4. Dchancroid

Question 14

Biology
The diagram shows some specialised human cells.
Which cell, A, B, C or D, is the target of HIV?
  1. AA
  2. BB
  3. CC
  4. DD

Question 15

Chemistry

The diagram shows a simple distillation apparatus.

What happens in part X?

  1. Athe distillate is warmed
  2. Bvapour is converted to liquid
  3. Cvapour is directed into the container
  4. Dsalt and the distillate are separated

Question 16

Chemistry
Element X has an electronic configuration of 2, 8, 2.
What is the charge of an ion of X?
  1. AX2+X^{2+}
  2. BX2−X^{2-}
  3. CX6+X^{6+}
  4. DX6−X^{6-}

Question 17

Chemistry
Which statement is true about the atom 1737X^{37}_{17}X ?
  1. AIt has 37 neutrons.
  2. BIt has 37 protons.
  3. CIt has 20 protons.
  4. DIt has 20 neutrons.

Question 18

Chemistry
Which formula is used to calculate the concentration of a solution?
  1. Anumber of moles X volume
  2. Bmass X volume
  3. Cnumber of molesvolume\frac{number\ of\ moles}{volume}
  4. Dvolumemass\frac{volume}{mass}

Question 19

Chemistry
Which one is a property of a molten ionic compound?
  1. AIt is an electrolyte.
  2. BIt is insoluble in water.
  3. CIt has a low melting point.
  4. DIt is a non conductor of electricity.

Question 20

Chemistry
Chlorine gas is used in
  1. Afood preservation.
  2. Belectric light bulbs.
  3. Csoap making.
  4. Dwater purification.

Question 21

Chemistry
The reaction between sodium hydroxide and hydrochloric acid produces a salt and
  1. Awater.
  2. Ba base.
  3. Can acid.
  4. Dhydrogen.

Question 22

Chemistry
Iron, copper, zinc and magnesium are all metals.
Which one is the least reactive?
  1. Amagnesium
  2. Bcopper
  3. Czinc
  4. Diron

Question 23

Chemistry

The diagram shows the electrolysis of water.

What is gas X?

  1. Aoxygen
  2. Bchlorine
  3. Cnitrogen
  4. Dhydrogen

Question 24

Chemistry
Which process is prevented by galvanising?
  1. Adecomposition
  2. Bneutralisation
  3. Creduction
  4. Drusting

Question 25

Chemistry

The diagram shows stages in the manufacture of ammonia.

What is the pressure required at X?

  1. A8 - 10 atm
  2. B100 - 150 atm
  3. C200 - 300 atm
  4. D450 - 500 atm

Question 26

Chemistry
Iron is extracted from its ore in the blast furnace by the process of
  1. Aoxidation.
  2. Breduction.
  3. Celectrolysis.
  4. Dneutralisation.

Question 27

Chemistry
Which one is the correct structural formula of ethane?
  1. AA
  2. BB
  3. CC
  4. DD

Question 28

Physics
What is the reading shown by the micrometer screw gauge?
  1. A5.50 mm
  2. B5.32 mm
  3. C5.82 mm
  4. D6.32 mm

Question 29

Physics
What is the unit of force?
  1. Awatt
  2. Bjoule
  3. Campere
  4. Dnewton

Question 30

Physics
A load of 900 N is raised 1 m by an effort of 300 N along an inclined plane. The inclined plane is 4 m long.
What is the efficiency of the inclined plane?
  1. A25%
  2. B33%
  3. C67%
  4. D75%

Question 31

Physics

The diagram shows a lift pump.

What happens to the valves during the downward stroke?

  1. Avalve A opens, valve B closes
  2. Bvalve B opens, valve A closes
  3. Cvalves A and B open
  4. Dvalves A and B close

Question 32

Physics
Solids transfer heat by
  1. Aconvection.
  2. Babsorption.
  3. Cconduction.
  4. Dradiation.

Question 33

Physics
The tubes inside solar heating panels use the sun's heat energy to warm water.
Why are the tubes painted black?
  1. AThe black colour is a bad emitter of heat.
  2. BThe black colour is a bad conductor of heat.
  3. CThe black colour is a good absorber of heat.
  4. DThe black colour is a good reflector of heat.

Question 34

Physics
Which energy conversion takes place in a thermal power generator?
  1. Achemical → kinetic → electrical
  2. Bchemical → heat → kinetic → electrical
  3. Cgravitational potential → kinetic → electrical
  4. Dgravitational potential → heat → kinetic → electrical

Question 35

Physics
The speed of an electric motor can be increased by
  1. Ausing a thinner wire.
  2. Breducing the size of current.
  3. Cincreasing the number of turns on the coil.
  4. Dreversing the direction of the magnetic field.

Question 36

Physics
Messages are sent through cellphones in the form of
  1. Aheat waves.
  2. Blongitudinal waves.
  3. Celectrostatic waves.
  4. Delectromagnetic waves.

Question 37

Physics

The diagram shows an electric circuit.

What is component X?

  1. Afuse
  2. Bswitch
  3. Cresistor
  4. Dammeter

Question 38

Physics
Which circuit, A, B, C or D, is used to verify Ohm's law?
  1. AA
  2. BB
  3. CC
  4. DD

Question 39

Physics
What is the power of a lamp rated 12 V, 2 A?
  1. A24 W
  2. B14 W
  3. C10 W
  4. D6 W

Question 40

Physics
What might cause an electric shock?
  1. Atouching electrical appliances with wet hands
  2. Boverheating of cables for various reasons
  3. Cusing thick electrical wires
  4. Dconnecting an earth wire

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