Multiple Choice QuestionsWhich one of the following natural polymers is found both in insects and fungi?
Pectin
Chitin
Cellulose
Suberin
Which one of the following antibiotics kills bacterial cells by inhibiting the polymerisation of peptidoglycan?
Aminoglycosides
Fluoroquinolones
Quinines
Penicillins
Which one of the following organisms is not used as a biocontrol agent?
Bacillus sphaericus
Trichoderma viride
Bacillus thuringiensis
Bacillus subtilis
D.
Bacillus subtilis
Bacillus subtilis is a Gram-positive bacteria found in soil and the gastrointestinal tract of ruminants and humans. It is not used as a biocontrol agent.
Bacillus sphaericus is used as a biocontrol agent.
Trichoderma species are free- living fungi that are very common in the root ecosystems. They are effective biocontrol agents of several plant pathogens.
Bacillus thuringiensis is used to control butterfly caterpillars. They are available in sachets as dried spores and are mixed with water and sprayed onto vulnerable plants such as brassicas and fruit trees.
Which one of the following insecticides is of plant origin?
Ecdysone
Rotenone
Parathion
Malathion
Curdling of milk in small intestine occurs due to the action of
trypsin
erypsin
rennin
chymotrypsin
A simple technology has been developed in India for plant breeders and farmers to use two plants as biofertilizers for growing rice. These are
Azotobacter and Rhizobium
Chlorella and Spirulina
Azolla and nitrogen fixing blue-green algae
Riccia and Marchantia
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