Question54:-Lyophilization is otherwise called
A:-Freeze thawing
B:-Freeze etching
C:-Freeze fracturing
D:-Freeze drying
Correct Answer:- Option-D
Question55:-Which one of the following is a capsulated pathogenic yeast?
A:-Schizosaccharomyces pombe
B:-Aspergillus flavus
C:-Saccharomyces cerevisiae
D:-Cryptococcus neoformans
Correct Answer:- Option-D
Question56:-Penicillin is an example for a
A:-Aminoglycoside
B:-Polyene antibiotic
C:-B-lactam antibiotic
D:-Polypeptide antibiotic
Correct Answer:- Option-C
Question57:-Gram stained smear a of CSF sample shows the presence of gram negative diplococci. Which one of the
following the organisms is most likely to be isolated from the sample?
A:-N. gonorrhoeae
B:-N. meningitidis
:-Streptococcus pneumoniae
D:-Streptococcus pyogenes
Correct Answer:- Option-B
Question58:-Nitrogen fixing symbiotic organism present in the leaves of Azolla is
A:-Anabaena
B:-Alosira
C:-Azospirillum
D:-Rhizobium
Correct Answer:- Option-A
Question59:-Denitrification refers to which of the following processes?
A:-Production of ammonia form amino acids
-Conversion of nitrogen to ammonia
C:-Conversion of nitrates to nitrogen
D:-Conversion of ammonia to nitrate
Correct Answer:- Option-C
Question60:-Which one of the following is considered to be an indicator of water pollution?
A:-N. gonorrhoeae
. Coli
:-Haemophilus influenzae
D:-Streptococcus pyogenes
Correct Answer:- Option-B
Question61:-Phosphatase test is used to test the efficacy of which of the following processes?
A:-Pasteurization
B:-Canning
C:-Cold sterilization
D:-None of the above
Correct Answer:- Option-A
Question62:-Which of the following is not used for disinfection of water?
A:-Chlorine
-Ultra violet rays
C:-Ozone
D:-Mercuric chloride
Correct Answer:- Option-D
Question63:-Botulinum toxin acts by which of the following mechanism?
A:-Exerts its effects on the cyclic AMP system
-Causes lysis of RBC's
C:-Blocks the release of acetylcholine, at the neuromuscular junction