Question 1:
Diagram 1 shows the formation of triglyceride.
Diagram 1
(a)(i) Name R and S. [2 marks]
(a)(ii) In Table below, state the number of molecules for R and S. [2 marks]
(b)(i) Name process W. [1 mark]
(b)(ii) Explain process W. [2 marks]
(c) Triglyceride is a type of lipid.
State one function of triglyceride in human. [1 mark]
(d) Diagram 2 shows a cross-section of an artery in an individual who practices an unhealthy eating habit.
Diagram 2
Explain the effect of the unhealthy eating habit to his health. [3 marks]
Effect:
Explanation:
(e) Suggest one practice to avoid the formation of J deposit in the artery. [1 mark]
Answer:
(a)(i)
R: Glycerol
S: Fatty acids
(a)(ii)
(b)(i)
Condensation
(b)(ii)
1 molecule of glycerol combines with three molecules of fatty acids to form triglyceride and releases 3 molecules of water.
(c)
Source of energy
(d)
Effect: Artherosclerosis // Stroke
Explanation: High intake of fats / lipids / cholesterol will cause the deposition of fat / cholesterol on the inner wall of artery.
Block the blood flow as lumen of the artery becomes narrow.
Diagram 1 shows the formation of triglyceride.
Diagram 1(a)(i) Name R and S. [2 marks]
(a)(ii) In Table below, state the number of molecules for R and S. [2 marks]
(b)(i) Name process W. [1 mark]
(b)(ii) Explain process W. [2 marks]
(c) Triglyceride is a type of lipid.
State one function of triglyceride in human. [1 mark]
(d) Diagram 2 shows a cross-section of an artery in an individual who practices an unhealthy eating habit.
Diagram 2Explain the effect of the unhealthy eating habit to his health. [3 marks]
Effect:
Explanation:
(e) Suggest one practice to avoid the formation of J deposit in the artery. [1 mark]
Answer:
(a)(i)
R: Glycerol
S: Fatty acids
(a)(ii)
(b)(i)
Condensation
(b)(ii)
1 molecule of glycerol combines with three molecules of fatty acids to form triglyceride and releases 3 molecules of water.
(c)
Source of energy
(d)
Effect: Artherosclerosis // Stroke
Explanation: High intake of fats / lipids / cholesterol will cause the deposition of fat / cholesterol on the inner wall of artery.
Block the blood flow as lumen of the artery becomes narrow.
(e)
Take a balance diet // Consume less oily food