Exam Section
- Viruses of the genus Nucleopolyhedrovirus are employed as
(a) gobar gas producers
(b) biological control agents
(c) anaerobic sludge digesters
(d) antibiotics
(e) atmospheric nitrogen fixing agents.
(Kerala PMT 2014) - Select the correct pair of microorganism and the product
obtained from it.
(a) Monascus purpureus - produces large holes in Swiss
cheese.
(b) Saccharomyces cerevisiae - used for making wine and
beer after distillation.
(c) Streptococcus - produces streptokinase which is used to
remove clots.
(d) Aspergillus niger - produces citric acid and butyric acid.
(AIIMS 2014) - Wine and beer are produced directly by fermentation
whereas brandy and whisky require both fermentation and
distillation. This is because
(a) fermentation is inhibited at an alcohol level of 10-18%
(b) distillation prolongs storage
(c) distillation improves quality
(d) distillation purifies the beverage.
(AIIMS 2014) - Yeast is used for commercial production of
(a) methanol (b) ethanol
(c) butanol (d) citric acid. (AMU 2014) - Statin, a blood-cholesterol lowering agent, is commercially
obtained from
(a) Trichoderma polysporum
(b) Acetobacter aceti
(c) Clostridium butylicum
(d) Monascus purpureus.
(AMU 2014) - ‘Roquefort cheese’ is ripened by using a
(a) bacterium (b) type of yeast
(c) cyanobacteria (d) fungus.
(Karnataka CET 2014) - Match the microbial products listed under Column I with
the related microbes given under Column II. Choose the
appropriate option from the given choices.
Column I Column II
A. Citric acid p. Methanobacterium
B. Cyclosporin A q. Monascus purpureus
C. Statin r. Aspergillus niger
D. Gobar gas s. Trichoderma polysporum
t. Clostridium butylicum
(a) A-q; B-s; C-t; D-r (b) A-r; B-s; C-q; D-p
(c) A-r; B-s; C-q; D-t (d) A-t; B-q; C-s; D-r
(Karnataka CET 2014)- Microorganism used for commercial production of acetic
acid is
(a) Saccharomyces cerevisiae
(b) Aspergillus niger
(c) Acetobacter
(d) Clostridium butylicum.
(J & K 2014) - Which of the following microbes is correctly matched with
its function?
(a) Aspergillus niger – Production of lactic acid
(b) Trichoderma – Lowers blood cholesterol
polysporum
(c) Saccharomyces – Production of citric acid
cerevisiae
(d) Methanogenic – Gobar gas formation
bacteria
(AIIMS 2014) - Microbe used for biocontrol of pest butterfly caterpillars is
(a) Saccharomyces cerevisiae
(b) Bacillus thuringiensis
(c) Streptococcus sp.
(d) Trichoderma sp.
(NEET - Karnataka 2013) - Which one of the following microbes forms symbiotic
association with plants and helps them in their nutrition?
(a) Azotobacter (b) Aspergillus
(c) Glomus (d) Trichoderma
(AIPMT Prelims 2012) - A nitrogen-fixing microbe associated with Azolla in rice fields
is
(a) Spirulina (b) Anabaena
(c) Frankia (d) Tolypothrix.
(AIPMT Prelims 2012) - Which one of the following is an example of carrying out
biological control of pests/diseases using microbes?
(a) Trichoderma sp. against certain plant pathogens.
(b) Nucleopolyhedrovirus against white rust in Brassica.
(c) Bt-cotton to increase cotton yield.
(d) Lady bird beetle against aphids in mustard.
(AIPMT Prelims 2012) - Match the items in Column I with those in Column II and
select the correct answer from the codes given below.
Column I Column II
P. Blue green algae as (i) Ectomycorrhiza
biofertilisers
Q. Fungi as biofertilisers (ii) Thiobacillus sp.
R. Free living nitrogen (iii) Anabaena sp.
fixing bacteria
S. Phosphate solubilising (iv) Clostridium sp.
bacteria