Higher the biodegradable organic matter in sewage

(1) Higher the dissolved oxygen

(2) Higher the BOD

(3) Lower the number of Bacteria

(4) All of these

Subtopic:  Microbes in Sewage Treatment |
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Match each item in Column I with one item in Column II and chose your answer from the codes given below:
Column I                                                       Column II
I. Roots of leguminous plants                          1. Frankia
II. Azolla                                                       2. Mycorrhiza
III. Glomus                                                    3. Anabaena
IV. Alnus                                                        4. Rhizobium
Codes:
I II III IV
A. 1 2 3 4
B. 2 1 4 3
C. 2 1 3 4
D. 4 3 2 1

Subtopic:  Microbes as Biofertilizer |
 79%
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Match each item in Column I with one item in Column II and choose your answer from the codes given below:
Column I                                      Column II
I. Aspergillus niger                       1. Clot buster
II. Streptococcus                          2. Citric acid
III. Trichoderma                           3. Cyclosporin A
IV. Monascuspurpureus                 4. Statins
Codes:
I II III IV
A. 1 2 3 4
B. 2 1 4 3
C. 2 1 3 4
D. 1 2 4 3

Subtopic:  Chemicals, Enzymes & Other Bioactive Molecules |
 86%
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Match each item in Column I with one item in Column II and chose your answer from the codes given below:
Column I                                 Column II
(GM microbe)                           (Application)
I. Rhizobium meliloti                 1. Prevention of frost damage
II. Pseudomonas                       2. Nitrogen fixation in fluorescence cereals
III. Pseudomonas putida            3. Scavenging of oil spills
IV. Trichoderma                         4. Biocontrol of fungal diseases
Codes:
      I   II   III   IV
A.   1   2    3     4
B.   2   1   4      3
C.   2   1   3      4
D.   1   2   4      3

Subtopic:  Microbes in Biocontrol Agent |
 64%
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In the given diagram, the gas X can be:
  

1. Hydrogen sulfide 2. Carbon monoxide
3. Ammonia 4. Oxygen
Subtopic:  Microbes in Production of Biogas |
 82%
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The virus shown here is a causative agent of:

1. Intestinal infections
2. Respiratory infections
3. CNS infections
4. Genito-urinary infections
Subtopic:  Industrial Products, Beverages & Antibiotics |
 89%
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Nitrogen fixation is carried out by:

1.  bacteria 2.  fungi
3.  protists 4.  algae

Subtopic:  Microbes as Biofertilizer |
 82%
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Which one of the following impurities is easiest to remove from wastewater?

1. Bacteria 2. Colloids
3. Dissolved solids 4. Suspended solids
Subtopic:  Microbes in Sewage Treatment |
 84%
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Match the following list of bioactive substances and their roles:
Bioactive Substances: -
(i) Statins (ii) Cyclosporin A (iii) Streptokinase (iv) Lipase

Role-
A. Removal of oil stains
B. Removal of clots from blood vessels
C. Lowering of blood cholesterol
D. Immuno-suppressive agent

Choose the correct match:

1. i B, ii C, iii A, iv D

2. i D, ii B, iii A, iv C

3. i B, ii A, iii D, iv C

4. i C, ii D, iii B, iv A

Subtopic:  Chemicals, Enzymes & Other Bioactive Molecules |
 91%
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Match the items in Column ‘A’ and Column ‘B’ and choose correct answer:   

Column A

Column B

(i) Lady bird

(A) Methanobacterium

(ii) Mycorrhiza

(B) Trichoderma

(iii) Biological control

(C) Aphids

(iv) Biogas

(D) Glomus

           

The correct answer is:

1. i B, ii D, iii C, iv A     

2. i C, ii D, iii B, iv A

3. i D, ii A, iii B, iv C         

4. i C, ii D, iii A, iv A

Subtopic:  Chemicals, Enzymes & Other Bioactive Molecules | Microbes in Production of Biogas | Microbes in Biocontrol Agent |
 84%
From NCERT
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