1. Which of the following statements about lipids are correct?
I. Lipids consist of glycerol combined with alcohols.
II. Both oils and fats are triglycerides.
III. Oils are more saturated with hydrogen than are fats.
IV. Lipids are more highly reduced substances than are carbohydrates.
A. I, II and III
B. I and III only
C. II and IV only
D. I and IV only
2. Which of the following process is not involved in condensation?
A. Formation of glycosidic bond between glucose and fructose.
B. Esterification between glycerol and fatty acids to form a triglyceride.
C. Formation of two units of amino acids from a dipeptide.
D. Synthesis of cellulose.
3. Which is the properties of water?
A. Low viscosity with low surface tension.
B. High viscosity with low surface tension.
C. Low viscosity with high surface tension.
D. High viscosity with high surface tension.
4. Which of the following is made up of the condensation of β-glucose monomers?
A. Sucrose
B. Cellulose
C. Starch
D. Glycogen
5.The diagram shows a carbohydrate.What is the name of the bond that links the two units?
A. Saccharide bond
B. Glycosidic bond
C. Hydrogen bond
D. Peptide bond
6. Proteins can function as buffer because
A. Proteins contain peptide bonds
B. Proteins are non-polar molecules
C. Proteins are soluble in water
D. Proteins are amphoteric molecules
7. Saturated fatty acids differ from unsaturated fatty acids in
A. The presence of double covalent bonds in fatty acids
B. The physical condition of fatty acids at room temperature
C. The number of atoms in fatty acids
D. The branching of linear shape in fatty acids
8. Which of the following properties of water are important for regulation of temeprature in humans?
I. High latent heat of vaporisation
II. Highest density at 4 °C
III. High heat capacity
IV. High surface tension
A. I and II
B. I and III
C. I and IV
D. II and IV
9. Hydrophobic interactions are exhibited by
A. ions
B. polar molecules
C. bipolar molecules
D. nonpolar molecules
10. What does a haemoglobin molecule contain?
A. Four iron (Fe2+) ions attached to each haem group
B. Four oxygen molecules attached to each haem group
C. Four polypeptide chains each with four attached haem groups
D. Four polypeptide chains each with one attached haem group
Answers
1. C 6. D
2. C 7. A
3. C 8. B
4. B 9. D
5. B 10. D