136: The human immuno deficiency virus (HIV) is a living entity because it can
(a) Excrete in human serum
(b) Disturb host cell respiration
(c) Undergo auto-reproduction
(d) Move from one cell to another
137: Foot-and-Mouth disease in animals, a current epidemic in some parts of the world, is caused by
(a) Bacterium
(b) Fungus
(c) Protozoan
(d) Virus
138: An astronaut weighing 100 kg fires a bullet weighing 1 kg with a gun of 10 kg at the speed of 50 metres/second. What will be the recoil velocity of the gun ?
(a) 5 cm/s
(b) 50 cm/s
(c) 0.5 cm/s
(d) 0.05 cm/s
139: Hybridoma technology is a new biotechnological approach for commercial production of
(a) monoclonal antibodies
(b) interferon
(c) antibodies
(d) alcohol
140: Which one of the following ports handled the north Indian trade during the Gupta period ?
(a) Tamralipti
(b) Broach
(c) Kalyan
(d) Cambray