Advanced Biology Series Competence Based Solved Questions Pdf
Advanced Biology Series
Competence Based Solved Questions Pdf
1.
a. i. How would you justify that mitochondria are genetically autonomous or at
least semi-autonomous organelle? 1 mark
ii.
How would you justify semi-autonomous nature of chloroplast? 1 mark
iii.
What is symbiotic nature of chloroplast? Use 2 points. 2 marks
b.
i. Why Golgi bodies is also called Golgi apparatus? Name an organism and cell
where Golgi apparatus is absent. 2 marks
ii. ‘Cell theory has been challenged by modern
cytologists. In 4 points justify the statement. 2 marks
c.
i. What structural attributes that a functional cell must possess to be a
living cell? 1 mark
ii.
‘Multicellular organisms have the division of labour’. Explain. 1 mark
2.
a. i. Explain briefly what happens when milk is converted into yoghurt from you
understand of biochemistry. 2 marks
ii.
Briefly explain the composition of triglycerides. 2 marks
b.
i. Trypsin is a protease secreted in pancreatic juice which acts in duodenum.
If you make up a suspension of milk powder in water and add trypsin, the enzyme
digests the protein in the milk, so that the suspension becomes clear. How
could you carry an investigation into the effects of PH on rate of activity of
trypsin? 2 marks
ii. Are the enzyme inhibitors important in
biochemical pathway of the cell? Explain. 2 marks
3.
a. If ovary of woman is removed before 10-12 weeks of pregnancy, miscarriage is
most like to occur, however if they are removed after 10-12 weeks, the
pregnancy can proceed normally. Give the reasons to justify this fact. 3 marks
b.
A very large number of eggs usually laid by animals with external fertilization
while many species with internal fertilization produce relatively fewer eggs. 3
marks c. Dioecism (separate sexes) is most common in animals. Suggest why this
phenomenon is most successful in animals than in flowering plants. 4 marks
