cameroon gce A level June 2023 biology 1

cameroon gce A level June 2023 biology 1

cameroon gce A level June 2023 biology 1

Which of the following carbohydrates has
monomers linked by pi-4 linkages?
A Maltose.
B Lactose.
Sucrose.
D Cellulose.
8.
C
The vesicles that pinch off and fuse to form
cisternae of the golgi apparatus come from which
. cell organelle?
A Endoplasmic reticulum.
B Nucleus.
C Mitochondria.
D Cell surface membrane.
9.
2. Classification of organisms based on evolutionary
relationships between organisms is called:
A Artificial classification.
B Phylogenetic classification.
C Natural classification.
D Numerical classification.
£\
An invertebrate is collected from a fresh water
pond. Dissection of this invertebrate shows three
developmental body layers. It has a cuticle as its
outer body covering. To which phylum does it
belong?
A Arthropoda.
B Annelida.
C Cnidaria.
D Echinodermata.
An example of a globular protein is:
A Salivary amylase.
B Collagen.
C Keratin.
D Haemoglobin.
2). 10.
4. The presence of two cell layers in the body wall
of multicellular organisms makes them to be
called:
Triploblastic animals.
Coelomate animals.
Diploblastic animals.
Pseudocoelomate animals.
A
r
In humans, gaseous exchange takes place in the:
A Lungs.
B Nostrils.
C Trachea.
D Alveoli.
B 1 1.
c !
D
Each individual has a unique DNA finger print
because each individual has a unique set of:
A mutations in the DNA.
B proteins in the blood.
C enzymes in the mitochondria,
amino acids in the blood.
5.
An example of divergent evolution is:
A wings of insects and wings of birds.
B wings of birds and forelimb of humans.
C wings of honey bee and wings of bats.
D wings of bats and wings of butterfly.
12.
f
D
During expiration, which of the following takes
place?
A External intercostal muscles contract and
ribs move upwards and outwards.
B Internal intercostal muscles relax and ribs
move inwards and downwards.
C External intercostal muscles relax and ribs
move downwards and inwards.
D Internal intercostal muscles contract and
ribs move upwards and outwards.
6.
The liver breaks down RBC to produce:
A Urea.
B Ammonia.
C Amino acids.
D Bile pigments.
13. \
1
In genetic engineering restriction endonuclease
enzymes are used to:
A cut DNA at specific locations.
B cut RNA at specific locations.
C cut proteins at specific locations.
D cut amino acids on a polypeptide chain.
14.
In which of the following organs is the epithelial
tissue ciliated?
A Alveoli of lungs.
B Bowman’s capsule.
C Oviducts.
D Epidermis of skin.
7.
Which of these types of cells contain the highest
concentration of mitochondria?
A Erythrocyte.
B Leukocyte.
C Neuron.
D Sperm cell.