Microbes in Human Welfare

What is the reason behind production of large holes in 'Swiss Cheese' ?

1. The production of large amount of CO2 and H2 by Trichoderma polysporum
2. The production of large amount of CO2 and H2 by lactic acid bacteria called Lactobacillus
3. The production of large amount of CO2 by Propionibacterium sharmanii
4. The production of large amount of CO2 by Clostridium butylicum

Match List I with List II :

1. A-II, B-III, C-I, D-IV
2. A-III, B-II, C-IV, D-I
3. A-II, B-III, C-IV, D-I
4. A-IV, B-III, C-II, D-I

Which of the following is used as a clot buster?

1. Statins
2. Streptokinase
3. Penicillin
4. Cyclosporin A

Which of the following is an example of non-distilled alcoholic beverage produced by yeast?

1. Beer
2. Rum
3. Whisky
4. Brandy

Which of the following organisms cannot fix nitrogen? Choose the correct answer from the options given below:

1. B only
2. E only
3. A only
4. D only

Streptokinase produced by bacterium Streptococcus is used for

1. Liver disease treatment
2. Removing clots from blood vessels
3. Curd production
4. Ethanol production

Which of the following microbes is NOT involved in the preparation of household products? Choose the correct answer from the options given below:

1. C and D only
2. C and E only
3. A and B only
4. A and C only

Match List I with List II Choose the correct answer from the options given below:

1. A-III, B-I, C-II, D-IV
2. A-II, B-IV, C-III, D-I
3. A-III, B-I, C-IV, D-II
4. A-IV, B-I, C-III, D-II

Match List-I with List-II relating to microbes and their products: Choose the correct answer from the options given below:

1. A-II, B-III, C-IV, D-I
2. A-I, B-II, C-III, D-IV
3. A-I, B-III, C-II, D-IV
4. A-I, B-IV, C-II, D-III

Identify the microorganism which is responsible for the production of an immunosuppressive molecule cyclosporin A :

1. Trichoderma polysporum
2. Clostridium butylicum
3. Aspergillus niger
4. Streptococcus cerevisiae

Match List-I with List-II Choose the correct answer from the options given below

1. (a)-(iv), (b)-(ii), (c)-(i), (d)-(iii)
2. (a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
3. (a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
4. (a)-(ii), (b)-(iii), (c)-(i), (d)-(iv)

Which of the following is put into Anaerobic sludge digester for further sewage treatment?

1. Effluents of primary treatment
2. Primary sludge
3. Floating debris
4. Activated sludge

Match the following columns and select the correct option.

1. (a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
2. (a)-(i), (b)-(ii), (c)-(iv), (d)-(iii)
3. (a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
4. (a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)

Select the correct group of biocontrol agents.

1. Oscillatoria, Rhizobium, Trichoderma
2. Nostoc, Azospirillum, Nucleopolyhedrovirus
3. Bacillus thuringiensis, Tobacco mosaic virus, Aphids
4. Trichoderma, Baculovirus, Bacillus thuringiensis

Match the following organisms with the products they produce : Select the correct option.

1. (a)-(iii), (b)-(iv), (c)-(v), (d)-(i)
2. (a)-(ii), (b)-(i), (c)-(iii), (d)-(v)
3. (a)-(ii), (b)-(iv), (c)-(v), (d)-(iii)
4. (a)-(ii), (b)-(iv), (c)-(iii), (d)-(v)

Which of the following can be used as a biocontrol agent in the treatment of plant disease?

1. Anabaena
2. Lactobacillus
3. Trichoderma
4. Chlorella

Which of the following is a commercial blood cholesterol lowering agent?

1. Streptokinase
2. Lipases
3. Cyclosporin A
4. Statin

Conversion of milk to curd improves its nutritional value by increasing the amount of

1. vitamin D
2. vitamin A
3. vitamin B12
4. vitamin E

Select the mismatch :

1. Rhodospirillum - Mycorrhiza
2. Anabaena - Nitrogen fixer
3. Rhizobium - Alfalfa
4. Frankia - Alnus

Which of the following in sewage treatment removes suspended solids ?

1. Secondary treatment
2. Tertiary treatment
3. Primary treatment
4. Sludge treatment

Which of the following is correctly matched for the product produced by them ?

1. Acetobacter aceti : Antibiotics
2. Penicillium notatum : Acetic acid
3. Methanobacterium : Lactic acid
4. Saccharomyces cerevisiae : Ethanol

Which of the following is wrongly matched in the given table?

1. Microbe - Streptococcus, Product - Streptokinase, Application - Removal of clot from blood vessel
2. Microbe - Trichoderma polysporum, Product - Cyclosporin A, Application - Immunosuppressive drug
3. Microbe - Monascus purpureus, Product - Statins, Application - Lowering of blood cholesterol
4. Microbe - Clostridium butylicum, Product - Lipase, Application - Removal of oil stains

Match the following list of microbes and their importance -

1. (a) - (iii), (b) - (i), (c) - (iv), (d) - (ii)
2. (a) - (iii), (b) - (iv), (c) - (i), (d) - (ii)
3. (a) - (iv), (b) - (ii), (c) - (i), (d) - (iii)
4. (a) - (iv), (b) - (iii), (c) - (ii), (d) - (i)

The guts of cow and buffalo possess

1. Cyanobacteria
2. Fucus sp.
3. Methanogens
4. Chlorella sp.

What gases are produced in anaerobic sludge digesters ?

1. Methane and CO2 only
2. Methane, Hydrogen Sulphide and O2
3. Methane, Hydrogen Sulphide and CO2
4. Hydrogen Sulphide and CO2

A good producer of citric acid is

1. Clostridium
2. Saccharomyces
3. Aspergillus
4. Pseudomonas

Microbe used for biocontrol of pest butterfly caterpillars is :

1. Streptococcus sp.
2. Trichoderma sp.
3. Saccharomyces cerevisiae
4. Bacillus thuringiensis

In gobar gas, the maximum amount is that of :

1. Propane
2. Butane
3. Methane
4. Carbon dioxide

The domestic sewage in large cities :

1. has very high amounts of suspended solids and dissolved salts
2. has a high BOD as it contains both aerobic and anaerobic bacteria.
3. is processed by aerobic and then anaerobic bacteria in the secondary treatment in Sewage Treatment Plant (STPs)
4. When treated in STPs does not really require the aeration step as the sewage contains adequate oxygen

Read the following four statements (A-D) : How many of the above statements are wrong ?

1. Two
2. One
3. Four
4. Three