Cameroon GCE ordinary level June 2025 biology 1
Cameroon GCE ordinary level June 2025 biology 1
SECTION 1
Questions 1-7
(Seven questions)
Directions: Each of these questions or incomplete
statements is followed by four suggested
Select the best answer in each case and mark
the answer sheet appropriately.
In which organ of the human body are bile
salts produced?
A Pancreas.
B Duodenum.
C Gall bladder.
D Liver.
SECTION II
Questions 8 – 2 0
(Thirteen questions)
Directions: This group of questions relates to
biological diagrams. Select the best answer for
each question.
8. The diagram below is that of a bony fish.
3 Dorsal fin
answers.
i .
6 Caudal fin
5
2 Pectoral fin
2. Which of these organisms will occupy the 1 Pelvic fin .
first trophic level in an ecosystem?
A Cabbage.
B Caterpillar.
C Earthworm.
D Beetle. • .
Which numbered parts control pitching of the
fish in water?
A 1 and 2.
B 2 and 6.
C 2 and 3.
D 6 and 3.
3. Which of the following is the causative agent
for malaria?
A Female Anopheles mosquito.
B Culex mosquito.
C Plasmodium.
D Male anopheles mosquito.
The structure in the mammalian eye that
contains light sensitive cells is:
A Lens.
B Blind spot.
C Choroid.
D Retina.
9.
4. The streamline body of the bird enables it to:
A Capture prey easily.
B Reduce air resistance during flight.
C Reduce weight during flight.
D Perch on tree branches with ease.
How does the structure of the artery help in
its function?
A Thin elastic walls.
B Thin muscular walls.
C Thick elastic muscular walls.
D Thick inelastic muscular walls.
10.
5. Comparing inspired and expired air, expired
air:
A Is warmer. 11. The diagram below represents a nephron
B Contains no oxygen.
C Is dry.
D Is richer in nitrogen. glomerulus 5 ‘
Which of the following is an air pollutant?
A Herbicides.
B Refuse.
C Sewage.
D Noise.
6.
proximal
convolved 4
tubule
1 Collectingduct
Z distal convoluted tubule
3loop of Henle
A food sample was tested with Millon’s
reagent and a pink coloration was observed.
The food sample contains:
A Starch.
B Lipid.
C Reducing sugar.
D Protein.
7.
Where does ultra-filtration occur?
A 4.
B 5.
C 2.
D 1.
12.
f
x
The diagram below is that of the mammalian
brain.
17.
4
:
Why is it that only 10% energy is transferred
from one trophic level to another?
A Energy is stored in the organisms.
B Energy is released by the organisms.
C Energy is burnt up.
D Energy is used in metabolic processes.
13.
i
Cerebrum
i
Hypothalamus
14. Which structure in a bird plays a role in food
storage?
A Crop.
B Gizzard.
C Bill.
D Intestines.
t I Cerebellum
t [
r
. i Pituitary
Spinal cord
«
r*
Which of the labelled parts controls reasoning
and intelligence?
A Hypothalamus.
B Pituitary.
C Cerebrum.
D Cerebellum.
15. Below is the diagram of a bean seed:
18. Which of the following structures in the ileum
transports fatty acid and glycerol?
A Capillaries.
, B Lacteal.
C Epithelium.
D Microvilli.
During germination, water enters the seed
through the:
A Radicle.
B Micropyle.
. C Hilum.
D Testa.
19. Where in the mammalian skin is sebum
produced?
A Malpighian layer.
B Sebaceous gland.
C Sweat gland.
D Granular layer.
20. Carbon dioxide concentration in an industrial
zone can be kept constant by:
A Combustion of fuel.
B Deforestation.
C Afforestation.
D Grazing.
