Q. No.
The symbiotic association between fungi and roots of higher plants is called:
1. Lichen
2. Mycorrhiza
3. Biofertilizer
4. BOD
The organisms which are used to enrich the nutrient quality of the soil are called:
1. Mycorrhiza
2. Biofertilizers
3. Yeast
4. Methanogens
Which of the following serve as biofertilizer in paddy fields?
(1) Bacteria
(2) Yeast
(3) Cyanobacteria (blue-green algae)
(4) Fungi
The solids which settle after primary treatment of sewage are called:
(1) Primary sludge
(2) Activated sludge
(3) Flocs
(4) Total solids
Given below are three statements (A-B) each with one or more blanks. Select the option which correctly fills the blanks in the statements Statements:
| A. | Bioactive molecule, ________ is used as immunosuppressive agent in organ transplant patients, It is produced by the fungus ________. |
| B. | Primary treatment of sewage involves physical removal of small and large particles through ________. |
1. A - Antibiotic, Trichoderma polysporum; B - filtration and sedimentation
2. A - Cyclosporin A, Trichoderma polysporum; B - filtration and sedimentation
3. A - Cyclosporin A, Trichoderma polysporum; B - Centrifugation and sedimentation
4. A - Antibiotic, Trichoderma polysporum; B - Centrifugation and sedimentation
Given below are three statements (A-B) each with one or more blanks. Select the option which correctly fill the blanks in the statements Statements:
A. Microbes consume the major part of the organic matter in the effluent and reduce _________ of sewage.
B. Certain bacteria which grow anaerobically on cellulosic material, produce large amount of methane along with CO2 and H2. The bacteria are commonly called as _________ and one such common bacterium is _________. Options:
(1) A - CO2 demand; B - methanogens, Methanobacterium
(2) A - Carbon; B - methanogens, Methanobacterium
(3) A - biochemical oxygen demand; B - methanogens, Methanobacterium
(4) A - biochemical oxygen demand; B - Methylokorus infemorum
The below diagram shows a typical biogas plant. Which of the following four option, products labelled as A are correctly identified:
1. A - Sludge; B - Methane, Oxygen; C - Dung, water
2. A - Sludge; B - Methane, Carbon dioxide; C - Dung, water
3. A - Sludge; B - Ethylin, Carbon dioxide; C - Dung, water
4. A - Sludge; B - Methane, Carbon dioxide; C - Sewage
|
|
Column-I |
|
Column-II |
|
I. |
Streptomyces |
A. |
Nitrogen fixation |
|
II. |
Rhizobium |
B. |
Source of antibiotics |
|
III. |
Nitrosomonas |
C. |
Vinegar synthesis |
|
IV. |
Acetobacter |
D. |
Nitrification |
Which of the combinations is correct?
|
|
I |
II |
III |
IV |
|
(1) |
B |
A |
D |
C |
|
(2) |
C |
D |
A |
B |
|
(3) |
A |
B |
C |
D |
|
(4) |
D |
B |
A |
C |
| Column-I | Column-II | ||
| I. | Methanogens | A. | Microbial biocontrol agent |
| II. | Organic wastes | B. | Penicillin |
| III. | Bacillus thuringiensis |
C. | Biochemical oxygen demand |
| IV. | Penicillium notatum | D. | Methanobacterium |
Which of the combinations is correct?
| I | II | III | IV | |
| (1) | B | A | D | C |
| (2) | C | D | A | B |
| (3) | D | C | A | B |
| (4) | D | B | A | C |
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