96: Consider the following statements regarding haemoglobin
1. It contains iron
2. It is a carrier of oxygen in the blood
3. It imparts red color to the blood
4. It provides immunity against certain diseases.
Of these statements
(a) 1, 2 and 4 are correct
(b) 1, 2 and 3 are correct
(c) 1, 3 and 4 are correct
(d) 2, 3 and 4 are correct
97: Consider the following statements, the purpose of adding sodium sulphate and sodium silicate to the detergent in a washing powder is
1. To keep the washing powder dry
2. To maintain the alkalinity of the powder
Which of these statements is/are correct?
(a) Only 1
(b) Only 2
(c) Both 1 and 2
(d) Neither 1 nor 2
98: Hybridoma technology is a new biotechnological approach for commercial production of
(a) monoclonal antibodies
(b) interferon
(c) antibodies
(d) alcohol
Explanation:
Hybridoma technology is a new biotechnological approach for commercial production of Monoclonal antibodies which are highly specific to the inducting antigen, and are relatively cheaper.
99: The sensation of fatigue in the muscles after prolonged strenuous physical work is caused by
(a) a decrease in the supply of oxygen
(b) minor wear and tear of muscle fibres
(c) the depletion of glucose
(d) the accumulation of lactic acid
Explanation:
Fatigue in muscles after prolonged strenuous physical work is due to the accumulation of lactic acid.
100: Consider the following statements :
Hard water is not suitable for
I. drinking.
II. washing cloths with soap.
III. use in boilers.
IV. irrigating crops.
Which of these statements are correct ?
(a) I and III
(b) II and III
(c) I, II and IV
(d) I, II, III and IV
Explanation:
Hardness of water is due to presence of bicarbonates, chlorides and sulphates of calcium and magnesium. It does not produce lather with soaps or detergents. When boiled, in the boilers, the salts of calcium and magensium are deposited on the walls of the boilers.