NAMIBIA SENIOR SECONDARY CERTIFICATE

BIOLOGY ORDINARY LEVEL 4322/1

PAPER 1 Multiple Choice 1 hour
Marks 40 2014

Additional Materials: Multiple choice answer sheet

Soft clean eraser
Soft pencil (type B or HB is recommended)

E L
INSTRUCTIONS AND INFORMATION TO CANDIDATES

E V
• Write in soft pencil.

L
• Answer all questions.
• Make sure that you receive the multiple choice answer sheet with your Candidate Number on it.

Y
• There are forty questions on this paper.

R
• 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.

A
• If you want to change an answer, thoroughly erase the one you wish to delete.

I N
Read the instructions on the answer sheet carefully.

R D
• Each correct answer will score one mark.
• All questions in this paper carry equal marks.

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• Any rough working should be done in this booklet.
• You may use a non-programmable calculator.

This document consists of 14 printed pages and 2 blank pages.

Republic of Namibia
MINISTRY OF EDUCATION
© MoE/DNEA 4322/1/14 [Turn over
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1 Which characteristic of living organisms is shown by the diagram of the nucleus of a
body cell of an organism below?

A growth
B nutrition
C reproduction
D respiration
2 Why does the organism, shown in the diagram below, belong to the kingdom protoctista?

A It has a nucleus.
B It has a vacuole.
C It has cilia.
D It is unicellular.
3 The diagram shows some external features of a wildebeest.

Which visible features shows that the wildebeest is a mammal?

A horns and sweat glands
B mammary glands and two pairs of legs
C pinnae and hair
D sweat glands and mammary glands

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4 The actual size of a cell is 0.25 mm. What would the diameter of the cell be if it was
drawn at a magnification of X200?
A 25 mm
B 50 mm
C 800 mm
D 5 000 mm
5 The diagram shows an eye of a human.

What is the part labelled X an example of?

A a system
B a tissue
C an organ
D an organelle
6 The diagram shows three cells.

Q R
P

Which is correct?

P Q R
A muscle cell red blood cell root hair cell
B red blood cell muscle cell xylem vessel
C root hair cell xylem vessel muscle cell
D xylem vessel root hair cell red blood cell

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7 Which statement about nitrate ions moving into a root hair cell is correct?
A They move from a high concentration to a low concentration, and no energy
input is needed.
B They move from a high concentration to a low concentration, using energy
provided by the cell.
C They move from a low concentration to a high concentration, and no energy
input is needed.
D They move from a low concentration to a high concentration, using energy
provided by the cell.
8 Which temperature water bath would be the most suitable for an experiment to
investigate the effect of a mammalian enzyme on a protein?
A 15 °C
B 25 °C
C 35 °C
D 45 °C
9 Potato cells contain an enzyme which breaks down hydrogen peroxide solution,
releasing oxygen gas.
Four experiments A, B, C and D were carried out using the apparatus shown below.

collected
oxygen

test-tube X

hydrogen water
peroxide
solution
potato
disk

The contents of test-tube X were different in each experiment.

Which content in test-tube X would result in the production of the largest volume
of oxygen?

volume of hydrogen number of potato condition of

experiment
peroxide solution/cm3 discs potato discs
A 5 10 boiled
B 5 10 raw
C 10 5 boiled
D 10 10 raw

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10 Which one of the following chemical elements must be present in the human diet to
prevent thyroxine deficiency?
A calcium
B iodine
C magnesium
D nitrogen
11 What is the process where food is taken into the mouth?
A absorption
B digestion
C egestion
D ingestion
12 Which type of tooth is found near the centre at the front of the human jaw?

A B C D

13 The diagram shows a human tooth with an area of decay.

area of
decay

What is likely to have caused the decay?

A acids released by bacteria
B digestion of the tooth by bacteria
C excess of fluoride in drinking water
D excess of sugary and sticky food eaten

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14 Which is the correct order (1 to 5), of the organs that the food passes through in the
digestive system?

oesophagus large intestine mouth stomach small intestine

A 1 3 5 2 4
B 4 1 3 5 2
C 2 5 1 3 4
D 3 1 4 5 2

15 The gall bladder stores bile. A patient in hospital has had his gall bladder removed
and needs a special diet.
Which meal would be most suitable for this patient?
A baked beans with bread and butter and ice cream
B cold chicken, green salad and fresh orange
C fish in cheese sauce and fruit pie
D fried fish, chips and sweet rice
16 What do the enzymes in the pancreatic juice digest?
A fats and carbohydrates only
B proteins and carbohydrates only
C proteins and fats only
D proteins, fats and carbohydrates
17 The diagram shows the effect of pH on the activity of two enzymes X and Y. These
enzymes are found in the human digestive system.

X Y
enzyme
activity

acidic neutral alkaline

Which correctly identifies enzyme X and the region of the digestive system where
it is found?

enzyme region of digestive system

A amylase duodenum
B amylase stomach
C protease duodenum
D protease stomach

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18 Aphids are small insects that feed by sucking sap from the phloem in plants.
Which substance are the aphids feeding on?
A glucose
B nectar
C starch
D sucrose
19 The diagram shows a capillary network surrounding a body cell.

X Y

tissue
fluid

Which substances are represented by letters X and Y?

X Y
A amino acids fatty acids
B carbon dioxide amino acids
C fatty acids glucose
D glucose carbon dioxide

20 The diagram shows a white blood cell engulfing a bacterium.

bacterium

white blood
cell

What is the name given to this activity?

A digestion
B egestion
C ingestion
D phagocytosis

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21 The diagram shows a mixture of apple juice and yeast in a container.

oil layer

apple juice + yeast

Which equation summarises the process that takes place in the container?

A sugar carbon dioxide + ethanol + energy released

B sugar carbon dioxide + lactic acid + energy released
C sugar ethanol + energy released
D sugar lactic acid + energy released
22 What path does a molecule of carbon dioxide take as it leaves the body?
A alveolus bronchiole bronchus trachea larynx
B alveolus bronchus bronchiole trachea larynx
C trachea bronchiole bronchus larynx alveolus
D trachea larynx bronchus bronchiole alveolus
23 Some of the processes involved in breathing in is described below.
1 air pressure decrease
2 air flows in
3 intercostal muscles contract
4 intercostal muscles relax
5 diaphragm relax
6 diaphragm contracts
7 ribs pull upwards
9 volume of lungs decrease
Which correctly shows the sequence of events during breathing in.

first last
A 1 8 4 6 2
B 3 6 7 1 2
C 4 5 8 7 2
D 8 3 5 7 2

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24 Which is a function of the kidney?
A formation of haemoglobin
B formation of urea
C removal of haemoglobin
D removal of urea
25 The diagram shows the response from a seedling to stimuli.

Which substance is involved in bringing about the response?

A auxin
B chlorophyll
C glucose
D mineral ions
26 Which hormone will be secreted in large quantities as soon as Sara is frightened by
a strange noise?
A adrenaline
B glucagon
C insulin
D progesterone
27 Which part of the human eye prevents light being reflected in the eye?
A choroid
B iris
C retina
D sclera

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28 The diagram shows the response of a person’s pupil when going from dim light to
bright light.
dim light bright light

What happens to the iris muscles to bring about the response shown?
A circular and radial muscles contract
B circular and radial muscles relax
C circular muscles contract and radial muscles relax
D circular muscles relax and radial muscles contract
29 Which is true for every pollen grain?
A It contains a diploid nucleus.
B It contains a male nucleus.
C It is carried by insects.
D It is carried by wind.
30 The level of oestrogen in the blood of a woman changes during a normal
menstrual cycle.
Which graph shows these changes?

A B
level of oestrogen

level of oestrogen

1 14 28 1 14 28
time/days time/days

C D
level of oestrogen

level of oestrogen

1 14 28 1 14 28
time/days time/days

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31 What is the function of the amniotic fluid in the female body of humans?
A to carry oxygen to the fetus
B to protect the fetus against shocks
C to stop viruses from reaching the fetus
D to supply food and water to the fetus
32 The diagram shows the structure of a dicotyledonous seed.

1
2

Which parts form the embryo from which a new plant will grow?
A 1 and 2 only
B 1 and 3 only
C 2 and 3 only
D 1, 2 and 3
33 In addition to water, what is essential for the germination of a seed?
A oxygen and a favourable temperature
B oxygen and soil
C soil and a favourable temperature
D soil and light

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34 A leaf dropped off a tree and fell onto damp ground. The diagram shows the changes
that occurred in the leaf over a period of time.

Which type of organism is most likely to have caused these changes?

A a carnivore
B a decomposer
C a herbivore
D a producer
35 The graphs show the number of herbivores in a habitat over a period of time. At time
X the carnivores are removed from the habitat.
Which graph shows the effect of this on the number of herbivores?

A B
herbivores

herbivores
number of

number of

X time X time

C D
herbivores

herbivores
number of

number of

X time X time

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36 The diagram shows energy flow through an ecosystem.

energy input

producer

primary consumer

secondary consumer

tertiary consumer

Which level obtains the most energy?

A primary consumer
B producer
C secondary consumer
D tertiary consumer
37 What would cause an increase in the numbers of a population?
A more deaths
B more diseases
C more food available
D more predators
38 What is the result of cutting down trees in a forest?
A a decrease in carbon dioxide in the atmosphere
B a decrease in transpiration
C an increase in rainfall
D an increase in sulphur dioxide in the atmosphere

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39 A farmer put fertiliser on his field. Soon afterwards, there was a heavy storm and
some of the fertiliser drained into a lake. The diagram shows the relative positions
of the field and lake.
crop plants

land with fertiliser

lake plants

What is the effect of the fertiliser on the rate of growth of the crop plants in the field
and the plants in the lake?

rate of growth of crop plants rate of growth of lake plants

A decreases no change
B increases decreases
C increases increases
D no change increases

40 Which is the best way to conserve the environment and its natural resources?
A burning of waste materials
B burying rubbish in the soil
C dumping rubbish in the sea
D recycling of used materials

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