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Correctly identify the enzymes (A), (B), and (C) of yeast during the leavening process of bread making:
$\mathrm{Wheat} \mathrm{flour} \mathrm{starch} \stackrel{\mathrm{A}}{\to } \mathrm{Maltose} \stackrel{\mathrm{B}}{\to } \mathrm{Glucose} \stackrel{\mathrm{C}}{\to } \mathrm{Ethyl} \mathrm{alcohol} + {\mathrm{CO}}_2$
           A            B             C
(1) Zymase   Amylase    Maltase
(2) Zymase   Maltase     Amylase
(3) Amylase   Maltase    Zymase
(4) Maltase    Amylase    Zymase

Match the column :
Column - I   Column - II
A. Curd           (i) LAB
B. Yoghurt      (ii) Penicillium
C. Buttermilk  (iii) Lactobacillus bulgaricus and
                           Streptococcus thermophilus
D. Cheese      (iv) LAB and Streptococcus cremoris
(1) A = (i), B = (iii), C = (iv), D = (ii)
(2) A = (i), B = (iv), C = (i), D = (iii)
(3) A = (iv), B = (ii), C = (i), D = (iii)
(4) A = (ii), B = (iv), C = (iii), D = (i)

Read the following statements:
(i) Statins are produced by some yeasts
(ii) Statins are blood cholesterol-lowering agents
(iii) Statins resemble mevalonate
(iv) Statins are competitive inhibitor of \beta-hydroxy- $$β -methyl glutaryl CoA reductase (HMG $$CoA )
(v) Statins are immunosuppressive agents.
Which of the above statements are
correct?
(a) $$(i), (ii) , (iii) and (iv)
(b) $$(i), (ii) and (v)
© $$(ii), (iv) and (v)
(d) $$(ii), (iii), (iv) and (v)
 

Which of the following are end products during fermentation caused by yeasts?
(1) Ethanol $+{\mathrm{CO}}_2+$ Energy
(2) Ethanol $+{\mathrm{H}}_2\mathrm{O}+$ Energy
(3) Ethanol $+{\mathrm{H}}_2\mathrm{S}+$  Energy
(4) Ethanol $+{\mathrm{H}}_2\mathrm{S} +{\mathrm{H}}_2\mathrm{O}+$Energy

Enzyme having thrombolytic effect is:
1. Streptokinase
2. Lipase
3. Protease
4. Zymase 

In a sewage treatment plant (STP), the primary treatment is a   (A)    which involves removal of small and large particles from sewage through _(B)   and     (C)   
                A                       B                            C
1.  Physical process    Filtration                 Sedimentation 
2. Chemical process    Filtration                 Sedimentation
3. Biological               Filtration process     Sedimentat sedimentation
4. Biological process   Microbial digestion   Sedimentation

In sewage treatment plant (STP), the flocs (aerobic bacteria+fungal filament) settle in settling tank. This settled sediment is called:
1. Activated sludge/ secondary sludge
2. Activated sludge/ primary sludge
3. Primary effluent
4. Secondary effluent 

In a sewage treatment plant (STP), the primary sludge is obtained by a:
1. Physico-chemical process
2. Physical process
3. Biological process
4. Physico-biological process

Select the incorrect choice with respect to STP:
1. Biological treatment requires aeration
2. Primary treatment requires aeration.
3. Tertiary treatment requires aeration.
4. Both (b) and (c)

Biogas production is a type of:
1. Anaerobic action
2. Aerobic action
3. Both (a) and (b)
4. Physical action 

In a STP, the sewage water is treated till:
1. BOD of sewage water rises significantly at the end of secondary treatment.
2. BOD of sewage water is reduced significantly at the end of secondary treatment.
3. Anaerobic oxidation becomes very fast.
4. Reduction of organic wastes becomes complete.

Biogas production occurs with the help of:
1. Methanogens
2. Anaerobic breakdown of organic matter
3. Aerobic breakdown of organic matter
4. More than one option is correct 

The technology of biogas production was developed in India mainly by the contribution of:
1. KVIC and IARI
2. NEERI and RRI
3. KVIC and NEERI
4. IARI and NEERI 

Gobar gas is produces by:
1. Eubacteria
2. Archaebacteria
3. Fungi
4. Lichens

Choose the odd one out with respect to biopesticide
1. Devine
2. Nucleopolyhedovirus (NPV)
3. Bacillus thuringiensis
4. Opuntia 

Butterfly caterpillars can be controlled by the biocontrol agent like:
1. Lichens
2. Mycorrhiza
3. Streptomyces
4. Bacillus thuringiensis

Organic farming involves:
1. Integrated pest management,i.e., IPM
2. use of biopesticides and biofertilizers
3. Use of pest resistant varieties
4. More than one option is involved 

A non-symbiotic biofertilizer is:
1. Rhizobium and Frankia
2. Azospirillum and Azobacter
3. Rhizobium and Azospirillum
4. Frankia and Azobacter 

Which of the following is an important biofertilizer in rice fields?
1. Anabaena
2. Glomus
3. Rhizobium
4. neurospora

The symbiotic association of plant roots and fungi:
1. Is called mycorrhizal involving fungi Glomus
2. Is called lichen
3. Is called mycorrhizal involving fungi Neurospora
4. Is called mycoherbicide 

Which of the following is correct?
1. Aulosira is the most active, non-symbiotic nitrogen fixer in the three rice fields
2. Trichoderma is a free-living fungi common in root ecosystems and effective against several plant pathogens to prevent fields
3. Both (1) and (2)
4. 'College' is obtained from blue-green algae.