ZIMBABWE SCHOOL EXAMINATIONS COUNCIL
**General Certificate of Education Ordinary Level**
**BIOLOGY**
**PAPER 1 Multiple Choice**
1 hour
JUNE 2024 SESSION
Additional materials: Multiple Choice answer sheet Soft clean eraser Soft pencil (type B or HB is recommended)
INSTRUCTIONS TO CANDIDATES
Answer all questions. For each question there are four possible answers \(\mathbf{A}, \mathbf{B}, \mathbf{C}\) and \(\mathbf{D}\), choose the correct answer. Record your choice in soft pencil on the separate answer sheet provided.
Read carefully the instructions on the answer sheet.
INFORMATION FOR CANDIDATES
There are forty questions in this paper. Each correct answer will score one mark. Any rough working should be done on this question paper.
Question 1
Which branch of Biology uses biological processes, organisms or systems to make products that improve lives of people?
A anatomy
B biotechnology
C cytology
D physiology
Question 2
If the flame jumps out too high, when lighting a Bunsen burner,
A shout to alert the others.
B turn off the gas tap.
C close the air holes.
D blow out the flame.
Question 3
Polysaccharides are a class of
A lipids.
B proteins.
C carbohydrates.
D nucleic acids.
Question 4
The diagram shows stages in an experiment to test for a food nutrient.
The test is for
A glucose.
B protein.
C starch.
D fat.
Question 5
A cell is the
A smallest part of an organism.
B basic functional unit of life.
C site of biochemical reactions.
D active part of an organism.
Question 6
What is true about the nucleus of a plant cell?
A It contains DNA.
B It is a site of respiration.
C It contains cell sap.
D It is a site of photosynthesis.
Question 7
The diagram shows a specialized cell
The cell is specialised for
A producing antibodies.
B ingesting pathogens.
C transporting oxygen.
D transmitting impulses.
Question 8
A detergent which contains enzymes will work best in water at
A any temperature.
B cold temperature.
C hot temperature.
D warm temperature.
Question 9
The graph shows the effect of substrate concentration on the rate of an enzyme-controlled reaction.
At point X, the active sites are
A unoccupied.
B saturated.
C destroyed.
D denatured.
Question 10
Which property of enzymes makes them specific?
A sensitive to pH
B posses active sites
C affected by temperature
D they are protein in nature
Question 11
An example of a micronutrient in plant nutrition is
A nitrogen.
B phosphorus.
C magnesium.
D potassium.
Question 12
Which hormone is essential for cell multiplication in plants?
A ethylene
B gibberellin
C auxin
D cytokinin
Question 13
Some plants, grown in a greenhouse, are supplied with all nutrients required for growth. The temperature is maintained at optimum and the supply of water is adequate. The plants have short roots and stems.
To promote shoot and root elongation in the plants, they can be sprayed with
A ethylene.
B gibberellins.
C auxins.
D cytokinins.
Question 14
The diagram shows a flower.
It is wind pollinated because it has
A spiky pollen.
B large petals.
C sticky stigma.
D exposed anthers.
Question 15
When investigating conditions necessary for germination, pyrogalic acid is used to exclude
A moisture.
B warmth.
C oxygen.
D carbon dioxide.
Question 16
The table shows the end products of digestion of starch, proteins and lipids.
Which row, \(\mathbf{A}, \mathbf{B}, \mathbf{C}\) or \(\mathbf{D}\), is correct?
| | starch | proteins | lipids | | :---: | :---: | :---: | :---: | | A | amino acids | glucose | fatty acids | | B | fatty acids | glucose | amino acids | | C | amino acids | fatty acids | glucose | | D | glucose | amino acids | fatty acids |
Question 17
The table shows the carbon dioxide percentage composition of inhaled and exhaled air. Which row, \(\mathbf{A}, \mathbf{B}, \mathbf{C}\) or \(\mathbf{D}\), shows the correct percentage in inhaled air and exhaled air?
| | inhaled air (\%) | exhaled air (\%) | | :---: | :---: | :---: | | A | 79 | 79 | | B | 20 | 16 | | C | 0.03 | 4 | | D | 0.01 | 6 |
Question 18
Breathing rate increases during physical activity to
A remove lactic acid from blood.
B supply more oxygen to the blood.
C supply more glucose to active tissues.
D remove carbon dioxide from the tissues.
Question 19
Which specialised cells are affected by HIV?
A thrombocytes
B erythrocytes
C lymphocytes
D phagocytes
Question 20
Which animal parasite damages the liver?
A bacteria
B fluke
C tick
D virus
Question 21
Which method of contraception is used by males only?
A loop
B vasectomy
C diaphragm
D tubal ligation
Question 22
The diagram shows the cross section of a kidney.
Which part, \(\mathrm{W}, \mathrm{X}, \mathrm{Y}\) or Z has the least concentration of urea?
A W
B X
C Y
D Z
Question 23
Which response will increase body temperature?
A vasodilation
B vasoconstriction
C shivering
D sweating
Question 24
The diagram shows an eyesight defect which needs to be corrected.
The defect can be corrected by use of
A concave lens.
B convex lens.
C bifocal lens.
D multifocal lens.
Question 25
Which one is a ball and socket joint?
A ankle
B elbow
C knee
D shoulder
Question 26
In a bread mould, which statement describes rhizoids?
A hyphae that grow vertically upwards
B structures that germinate into new hyphae
C hyphae that grow horizontally on the substrate
D hyphae that penetrate into the substrate
Question 27
The growth of bacteria is not affected by
A temperature.
B light.