CBSE
Multiple Choice QuestionsWhich of the following statement(s) are true?
Antibiotics can kill bacteria, but disinfectants do not
Disinfectants have better bactericidal efficiency than antibiotics
Antibiotics are of microbial origin, but disinfectants are chemical compounds
Antibiotics can be injected into the patients, whereas disinfectants are not
A good producer of citric acid is
Aspergillus
Pseudomonas
Clostridium
Saccharomyces
Which one of the following organisms is not used as a biocontrol agent?
Bacillus sphaericus
Trichoderma viride
Bacillus thuringiensis
Bacillus subtilis
Mycoplasma is resistant for
penicillin
tetracycline
streptomycin
All of the above
Which one of the following natural polymers is found both in insects and fungi?
Pectin
Chitin
Cellulose
Suberin
Curdling of milk in small intestine occurs due to the action of
trypsin
erypsin
rennin
chymotrypsin
Which compound has very important role in prebiotic evolution ?
SO2
NO
CH4
SO3
Which one of the following insecticides is of plant origin?
Ecdysone
Rotenone
Parathion
Malathion
Which one of the following antibiotics kills bacterial cells by inhibiting the polymerisation of peptidoglycan?
Aminoglycosides
Fluoroquinolones
Quinines
Penicillins
Who coined the term antibiotics ?
Woodruff
Darwin
Selman Waksman
A Fleming
