Biology Question Paper

Questions 1
HKALE 1990 Biology Paper II 1
HKALE 1993 Biology Paper II 1
HKALE 1996 Biology Paper II 1
HKALE 1999 Biology Paper II 1 Suggested Solution 3
HKALE 1990 Biology Paper II 3
HKALE 1993 Biology Paper II 4
HKALE 1996 Biology Paper II 6

Questions

HKALE 1990 Biology Paper II

5. (b) Discuss the importance of carbohydrates, lipids, proteins and roughage in the human diet.
(8 marks)

Suggested Solution…

HKALE 1993 Biology Paper II

6. Based upon its properties, discuss the role of water in the functioning of organisms . (20 marks)

Suggested Solution…

HKALE 1996 Biology Paper II

4. Describe the functions of lipids, proteins and nucleotides in living organisms. Illustrate your answer with examples and provide explanations where appropriate. (20 marks)

Suggested Solution…

HKALE 1999 Biology Paper II

1. (a) State four properties of water which make it essential for life and explain why they are essential.
(6 marks)

Suggested Solution…

Suggested Solution

HKALE 1990 Biology Paper II

5 (b) carbohydrates － structural component of membranes 0.5) nucleic acid 0.5) any 2 and ATP 0.5) － as energy source 0.5)

lipids － as energy reserve 0.5) － as primary component of membrane 0.5) － as insulating layer 0.5) － as carrier of fat soluble vitamins (e.g. A & D) 0.5)

proteins : source of (essential) amino acids for － growth and repair / structural proteins / enzymes 0.5, 0.5, 0.5) － hormones 0.5) － enzymes 0.5) － antibodies 0.5) any 4 － contractile proteins 0.5) － energy reserve in starvation 0.5)