Cameroon GCE advanced level June 2025 biology 1
Cameroon GCE advanced level June 2025 biology 1
Intrinsic proteins present in the cell membrane of
animal cells function mainly as:
A Enzymes.
B Receptor molecule.
C Pores.
D Channels.
2. Organisms in the phylum Basidiomycota such as
mushrooms possess:
A Septate hyphae.
B Aseptate hyphae.
C Conidia.
D Ascus.
This floral part forms the pericarp after
fertilisation.
A. Ovule wall.
B. Outer integument.
C. Ovary wall.
D. Inner integument.
9.
3. The spores of Penicillium produced as a result of
asexual reproduction at the tip of hyphae outside
the sporangia are:
A Conidia.
B Zygospores.
C Basidiospores.
D Ascospores
10. Inhibition of enzyme action by blocking its
active site is known as:
A Allosteric inhibition.
B Feedback inhibition.
C Competitive inhibition.
D Non-competitive inhibition.
In what part of the nephron and by what
mechanism does glucose move from the
filtrate in the nephron to the bloodstream
during normal kidney function?
A Collecting duct by active secretion.
B Distal convoluted tubule by facilitated
diffusion.
C Glomerulus by ultrafiltration.
D Proximal convoluted tubule by active
transport.
4. The spectrum graph showing the efficiency of the
different wavelength of light in stimulating
photosynthesis is:
A Absorption spectrum.
B Action spectrum.
C Efficiency spectrum.
D Reflection spectrum.
1 1 .
5. Why is a genetic code described as degenerate?
A Multiple combinations of different codons
can code for the same amino acid.
B Three bases in DNA code for one amino acids.
C Some codons do not code for any amino acids.
D Living organisms contain the same common
amino acids and the bases.
12. Growth of bacteria or microorganisms is
described as:
A changes in the total population.
B increase in the number of cells.
C increase in the size of each bacteria cell.
D increase in the mass of individual
organisms.
6. The presence of different colors in flowers is
caused by the following pigments:
A Chlorophyll and carotenoids.
B Anthocyanin and carotenoids.
C Xanthophyll and anthocyanin.
D Chlorophyll and anthocyanin.
13. Hemolytic disease of the newborn:
A causes jaundice which clears rapidly after
birth.
B. can be treated by transfusing the affected
baby with Rh-positive blood.
C. can be prevented by injecting the mother
with anti-D agglutinins just after delivery.
D occurs mainly in babies who are not of
blood group O
7. It is a simple food chain constructed from the
following organisms: Bird, Weevil, Maize, Hawk,
and Maggot.
A Maize
Maggot
B Maize
Weevil —> Hawk
Bird.
Hawk
Weevil
—> Bird .
C Bird ~>Weevil Maize
—> Maggot —> Bird —> Weevil.
D Maize Weevil —>Bird —>Hawk
—> Maggot.
Maggot
