NAMIBIA SENIOR SECONDARY CERTIFICATE

BIOLOGY ORDINARY LEVEL 6116/1

PAPER 1 Multiple Choice 45 minutes
Marks 40 2024

Additional Materials: Multiple choice answer sheet

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

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INSTRUCTIONS AND INFORMATION TO CANDIDATES

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• Write in soft pencil.
• Answer all questions.

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• Make sure that you receive the multiple choice answer sheet with your Candidate Number

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on it.

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• There are forty questions on this paper.
• For each question, there are four possible answers A, B, C and D. Choose the one you

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consider correct and record your choice in soft pencil on the separate answer sheet.
• If you want to change an answer, thoroughly erase the one you wish to delete.

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Read the instructions on the answer sheet carefully.

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• Each correct answer will score one mark.

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• All questions in this paper carry equal marks.
• Any rough working should be done in this booklet.

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• You may use a non-programmable calculator.

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This document consists of 15 printed pages and 1 blank page.

Republic of Namibia
MINISTRY OF EDUCATION, ARTS AND CULTURE
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1 The diagram shows an instrument that can be used in a Biology laboratory.

0.007 g

What does the instrument measure?

A mass
B temperature
C time
D volume

2 Which two taxa are used in naming organisms using the binomial system?
A family and kingdom
B family and genus
C genus and species
D kingdom and species

3 Palisade cells are found in plant leaves.

Which feature is present in a palisade cell but not in a liver cell?
A cell membrane
B chloroplast
C cytoplasm
D nucleus

4 The actual size of an object is 2000 µm. A drawing of the same object
measures 50 mm.
What is the magnification of the drawing?
A × 0.025
B × 25
C × 100
D × 100 000

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5 The diagram shows a leaf.

At what level of organisation is a leaf?

A cell
B organ
C organ system
D tissue

6 The diagram shows a eukaryotic cell.

Which structure produces ATP during respiration?

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7 The diagram shows the movement of molecules from outside the cell into the cell.

outside inside
the cell the cell

energy

molecule

Which phrase describes how the molecules move from outside the cell into the cell?
A against the concentration gradient by active transport
B against the concentration gradient by facilitated diffusion
C down a concentration gradient by osmosis
D down a concentration gradient by diffusion

8 DNA bases pair up to form two strands during DNA replication.

Which bases are paired correctly?
A G with A
B G with C
C G with G
D G with T

9 A learner carried out a food test to determine whether milk sugar, lactose, is a
reducing sugar.
Which row is a correct description of the test?

reagent to be used heating required positive result

A Benedict’s solution no orange colour
B biuret solution yes blue colour
C Benedict’s solution yes brick red colour
D biuret solution no blue colour

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10 The graph shows the effect of temperature on the activity of an enzyme.

100
percentage of
maximum activity
50

0
0 20 40 60
temperature / °C
At which temperature is the enzyme most active?
A 15°C
B 35°C
C 45°C
D 55°C

11 What will happen to a green plant grown in soil that is deficient in nitrate ions?
A It will have large leaves and small flowers.
B It will have purple leaves and poor root growth.
C It will have yellow leaves and poor overall growth.
D It will have white leaves and a thick stem.

12 In which part of the human alimentary canal does the digestion of starch begin?
A mouth
B oesophagus
C small intestine
D stomach

13 In which order do these events occur in human nutrition?

A digestion ingestion absorption egestion
B digestion ingestion egestion absorption
C ingestion digestion absorption egestion
D ingestion digestion egestion absorption

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14 The information below is taken from four packets of food.
Which food would be suitable for a person suffering from constipation?

A B
energy 163 kJ energy 466 kJ
protein 0.1 g protein 1.5 g
fat 0g fat 0.4 g
carbohydrates 9.4 g carbohydrates 27 g
fibre 1g fibre 4.9 g

C D
energy 1054 kJ energy 458 kJ
protein 19 g protein 2.1 g
fat 7.3 g fat 3.3 g
carbohydrates 27 g carbohydrates 19 g
fibre 8.1 g fibre 1.1 g

15 The graph shows how the rate of transpiration is affected by factor X.

rate of
transpiration

X
What could be factor X?
A humidity
B light intensity
C temperature
D wind speed

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16 The diagram shows a section through a plant stem.
In which tissue does the translocation of systemic pesticides take place?

17 The diagram shows a vertical section through the heart.

2
3

4
1

What are the functions of the blood vessels numbered 1, 2, 3 and 4?

carries blood carries blood carries blood carries blood
to body to lungs from lungs from body
A 1 4 3 2
B 2 1 3 4
C 2 3 4 1
D 3 2 4 1

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18 The diagram shows a method of treating coronary heart disease.

catheter threaded into

the aorta

Which method of treating a coronary heart disease is shown in the diagram?

A angioplasty
B coronary by-pass
C stent
D using aspirin

19 The body has different types of defences against pathogens.

1 antibodies
2 hair in the nose
3 mucus
4 skin

Which defences are mechanical?

A 1 and 2 only
B 1, 2 and 3 only
C 2, 3 and 4 only
D 2 and 4 only

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20 The table shows the composition of inspired and expired air.

inspired air/% expired air/%

carbon dioxide 0.04 X
oxygen 21 16
nitrogen 78 Y
other gases 1.0 1.0

What are the percentages of X and Y?

X Y
A 0.04 21
B 4 78
C 0.04 78
D 4 21

21 The equation for aerobic respiration given below is incomplete.

C6H12O6 + 6O2 6CO2 + ……………
Which information is needed to complete it?
A C3H6O3
B 2C2H5OH
C 6H2O
D 6O2

22 The diagram shows the human urinary system.

D
Which organ re-absorbs glucose so that glucose is not lost in urine?

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23 In which way is a kidney transplant advantageous compared to the dialysis
treatment?
A there is no organ rejection
B it is a permanent solution
C it is less expensive
D it is not a risky procedure

24 The diagram shows a seedling responding to light.

light

What explains the response of the shoot?

A inhibited cell elongation of the lower side of the shoot
B equal growth of cells on the upper and lower sides of the shoot
C stimulated cell elongation of the lower side of the shoot
D slowed growth of cells of the whole shoot

25 The diagram shows a neurone.

Which neurone is shown in the diagram?

A motor
B relay
C sensory
D synapse

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26 The parts of the eye shown in the diagram are involved in accommodation.

ciliary muscles

lens

suspensory ligament
How does each part change to accommodate a near object?
ciliary muscle suspensory ligament lens
A contracts slackens more convex
B contracts tightens less convex
C relaxes tightens more convex
D relaxes slackens less convex

27 Which response is an example of a voluntary action?

A changing the size of the pupil when entering a brightly lit room
B salivating when looking at a delicious meal
C answering the teacher’s question in class
D withdrawing a hand from a hot object

28 The diagram shows the major endocrine glands in the human body.

Which endocrine gland produces insulin?

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29 Below is a list of processes involved in temperature regulation in humans.
shivering sweating vasoconstriction vasodilation
Which processes occur when the body temperature rises above 37°C?
A shivering and sweating
B sweating and vasoconstriction
C sweating and vasodilation
D vasoconstriction and vasodilation

30 The diploid number of chromosomes in the nucleus of the cell of a domestic cat is 38.
How many chromosomes will be in a sperm cell nucleus and a skin cell nucleus?
sperm cell nucleus skin cell nucleus
A 19 19
B 19 38
C 38 38
D 38 19

31 The menstrual cycle is controlled by the hormones FSH, LH, oestrogen and
progesterone.
Which row shows a correct match between a hormone and its function?
hormone function
A FSH repair the endometrium after menstruation
B LH causes the release of the mature egg from the ovary
C oestrogen maintains the thickness of the endometrium
D progesterone causes the growth of the follicles in the ovary

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32 The diagram shows a foetus during pregnancy.

umbilical cord

What is the function of the umbilical cord?

A absorbs mechanical shock
B absorbs excess heat during pregnancy
C attaches the foetus to the placenta
D produces hormones during pregnancy

33 Which method of birth control involves surgery?

A abstinence
B condom
C IUD
D vasectomy

34 Height in plants is controlled by a pair of alleles. Allele T for tall height is

dominant over allele t for short height. Plants can be cross-pollinated to
produce the required height.
Which crossing will produce a phenotypic ratio of 3:1 tall to short in the offspring?
A TT × tt
B Tt × tt
C Tt × Tt
D TT × Tt

35 Which type of variation is discontinuous?

A height in humans
B length of leaves
C mass of seeds
D sex in humans

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36 The diagram shows a photomicrograph of a leaf of a hydrophyte.

Which adaptive feature enables the leaf to float on the water surface?

37 Which organism has the lowest amount of energy available compared to the
energy entering the food chain?
A carnivore that feeds on herbivores
B herbivores that feed on the producers
C producer that makes its own food
D consumer that feeds on carnivores

38 The graph shows the phases of the sigmoid growth curve of population growth.

4 5

3
population

2
1

time
Which factor could limit the growth of the population at 5?
A decreased predation
B lack of diseases
C limited food supply
D excess of reproducing individuals

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39 The events listed below occur during eutrophication in a lake.

1 aerobic bacteria break down dead organic matter

2 algae absorb the nutrients, bloom and die
3 amphibians, crustaceans and fish die due to lack of oxygen
4 nutrients enter the lake
5 water become deoxygenated
Which sequence of events is correct?
A 2 1 3 4 5
B 2 1 5 4 3
C 4 3 5 1 2
D 4 2 1 5 3

40 Which methods can be used to help sustain fish stocks?

key -  method used
 method not used
education legal quotas restocking increased fishing
A    
B    
C    
D    

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© MoEAC/DNEA 6116/1/24

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