Advanced level 2024 CASPA mock biology 2
Advanced level 2024 CASPA mock biology 2
1. a) In maize, the genes for coloured seed and full seeds are dominant over the genes for colourless seeds and shrunken seeds. Pure
breeding strains of the double dominant variety were crossed with the double recessive variety and a test cross on the F1 generation
produced the following.
380 coloured, full seeds
396 colourless , shrunken seeds
14 coloured , shrunken seeds
10 colourless, full seeds.
Calculate the distance in units between the genes for coloured seeds and seed shape.
b) Describe the process of selection in biology. (5, 15 marks)
2. a) state and explain the main functions of the kidney
b) Explain the general concept of the mechanism of homeostasis in mammals
c) Explain the events that occur during
i) Hypoglycemia
ii) Hyperglycemia (5, 5, 10 marks)
3. a) Define the following terms as used in reproduction
I. Fertilization
II. Pollination
III. Parthenogenesis
IV. Capacitation
V. Acrosome reaction
b) Describe the process in which sperm cells are produced in man. (10, 10 marks)
5. a) Describe in details the chemical structure of
I. A cocoyam tuber
II. Cow meat
b) Describe
I. The concept of isomerism in hexoses with structural illustrations.
II. Bonding in proteins (10, 10 marks)
6. Draw clearly annotated diagrams of
a) A longitudinal section through the human heart
b) The human alimentary canal
c) Section through the human eye (6, 7, 7 marks)
7. a) Describe the structure of a DNA molecule
b) Explain the concept of enzyme inhibition in metabolic reactions
c) Describe the process of glycolysis in tissue respiration. (7, 5, 8 marks)
8. a) Write a definition paragraph on each of the five major theories of the evolution of life on earth.
b) Write short notes on
I. Biotechnology
II. Genetic engineering
