cameroon gce advanced level June 2022 biology 1

cameroon gce advanced level June 2022 biology 1

cameroon gce advanced level June 2022 biology 1

Identify the organelle from which DNA is 7.
absent.
A Nucleus.
B Mitochondrion.
C Chloroplast.
D Ribosome.
1 .
by:
A BCD
A newly transcribed mRNA molecule is
usually longer than the sections of the gene
that actually code for the protein. The actual
codes in a eukaryotic gene are known as:
A Introns.
B Punctuation codons.
C Exons.
D Nonsense codons.
2.
If the water potential of a root hair cell is
.- 2000kPa and the pressure potential is
400kPa, the solute potential of the cell would
8.’
be:
A – 2400kPa.
B – 1600kPa.
C + 2400kPa.
D + 1600kPa.
The presence of a perivisceral cavity in the
mesoderm of triploblaslic multicellular
organisms makes them to be called:
A Acoelomates.
B Coclenterates.
C Coelomates.
D Pseudo coelomates.
3.
In C3 plants such as groundnut:
A the C02 acceptor is PEP.
B the first product of photosynthesis is
oxaloacetate.
C the C02 fixing enzyme is RUBP
carboxylase.
D the initial product of photosynthesis is
triose phosphate.
9.
Which of these passive mechanisms is
responsible for the movement of substances
across the cell surface membrane?
Diffusion.
Endocytosis.
Exocytosis.
Active transport.
4.
What is the genotype of the offspring from a
marriage between an albino man and a carrier
woman?
A All the offspring obtained will have a
normal genotype.
B All the offspring produced will have
the carrier genotype.
C Half of the offspring produced will
have the carrier genotype while the
other half will have normal genotype.
D Half of the offspring produced will
have carrier genotype while the other
half will have the albino genotype.
10.
ABCD
t •
The type of relationship between living
organisms of different species in which both
partners benefit is called:
A Predation.
B Mutualism.
C Commensalism.
D Parasitism.
5.
Algal blooms that occur in a fresh water lake
is caused by
6. 11. Epithelial tissues arise from:
A Mesoderm, Endoderm and Ectoderm.
Mesoderm.
C Endoderm.
D Ectoderm.
and leads to
B
A – an accumulation of soil in lakes;
– a rise in temperature.
B – an accumulation of dead material;
– an increase in decomposition.
C – discharge of sewage;
– eutrophication limiting primary
productivity.
D – an accumulation of sand;
– eutrophication which makes
navigation difficult.
12. Darwin’s statement ‘survival of the fittest’,
means that:
A the species most adaptable to changes
survives.
B the largest of the specie survives.
• C the most intelligent of the species
survives.
D the strongest of all species survives.