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155. The technique of obtaining large number
of plantlets by tissue culture method is called
a) Organ culture
b) Micropropagation
c) Macropropagation
d) Plantlet culture
Ans:b
156. The most abudant element present in
the plants is
a) Nitrogen b) Manganese
c) Iron d) Carbon
Ans:d
157. Cell elongation in internodal regions of
the green plants takes place due to
a) Cytokinins b) Gibberellins
c) Ethylene d) Indole acetic acid
Ans:b
158. Diversification in plant life appeared
a) Due to abrupt mutations
b) Suddenly on earth
c) By seed dispersal
d) Due to long periods of
evolutionary changes
Ans:d
159. A terrestrial animal must be able to
a) Conserve water
b) Actively pump salts out through the skin
c) Excrete large amounts of salts in urine
d) Excrete large amounts of water in
urine
Ans:a
160. Mast cells of connective tissue contain
a) Heparin and histamine
b) Heparin and calcitonin
c) Serotonin and melanin
d) Vasopressin and relaxin
Ans:a
161. Uricotelism is found in
a) Fishes and fresh water protozoans
b) Birds, reptiles and insects
c) Frogs and toads
d) Mammals and birds
Ans:b
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162. ATPase enzyme needed for
muscle contraction is located in
a) Troponin b) Myosin
c) Actin d) Actinin
Ans:b
163. Certain characteristic
demographic features of developing countries are
a) High fertility, high density, rapidly
rising mortality rate and a very young age distribution
b) High infant mortality, low fertility,
uneven population growth and a very young age distribution
c) High mortality, high density,
uneven population growth and a very old age distribution
d) High fertility, low or rapidly falling
mortality rate, rapid population growth and a very young age distribution
Ans:d
164. Duodenum has characteristic
Brunner's glands which secrete two hormones called
a)
Secretin, cholecystokinin
b)
Prolactin, parathormone
c)
Estradiol, progesterone
d)
Kinase, estrogen
Ans:a
165. Cancer cells are more easily damaged
by radiation than normal cells because they are
a) Undergoing rapid division
b) Different in structure
c) Non-dividing d) Starved of mutation
Ans:a
166. Which one of the following is not
correctly matched
a) Culex pipiens - Filariasis
b) Aedes aegypti - Yellow fever
c) Anopheles culifacies - Leishmaniasis
d) Glossina palpalis - Sleeping sickness
Ans:c
167. Which one of the following pairs is not
correctly matched
a) Serratia - Drug addiction
b) Spirulina - Single cell protein
c) Rhizobium - Biofertilizer
d) Streptomyces - Antibiotic
Ans:a
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