Q. No.During sewage treatment, biogases are produced which include :
1. Methane, hydrogen sulphide, carbon dioxide
2. Methane, oxygen, hydrogen sulphide
3. Hydrogen sulphide, methane, sulphur dioxide
4. Hydrogen sulphide, nitrogen, methane
The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals include the:
| 1. | Halophiles | 2. | Thermoacidophiles |
| 3. | Methanogens | 4. | Eubacteria |
Match Column I with Column II and select the correct option using the codes given below:
|
Column I |
Column II |
||
|
(a) |
Citric acid |
(i) |
Trichoderma |
|
(b) |
Cyclosporin A |
(ii) |
Clostridium |
|
(c) |
Statins |
(iii) |
Aspergillus |
|
(d) |
Butyric acid |
(iv) |
Monascus |
Codes:
|
(a) |
(b) |
(c) |
(d) |
|
|
1. |
(iii) |
(i) |
(iv) |
(ii) |
|
2. |
(i) |
(iv) |
(ii) |
(iii) |
|
3. |
(iii) |
(iv) |
(i) |
(ii) |
|
4. |
(iii) |
(i) |
(ii) |
(iv) |
Measuring biochemical oxygen demand (BOD) is a method used for:
| 1. | Measuring the activity of Saccharomyces cerevisiae in producing curd on a commercial scale. |
| 2. | Working out the efficiency of RBCs about their capacity to carry oxygen. |
| 3. | Estimating the amount of organic matter in sewage water. |
| 4. | Working out the efficiency of oil-driven automobile engines. |
The common nitrogen fixer in paddy fields is:
| 1. | Frankia | 2. | Rhizobium |
| 3. | Azospirillum | 4. | Oscillatoria |
Trichoderma harzianum has proved a useful microorganism for:
1. Biological control of soil-borne plant pathogens
2. Bioremediation of contaminated soils
3. Reclamation of wastelands
4. Gene transfer in higher plants
Which of the following, in sewage treatment, removes suspended solids?
1. Secondary treatment
2. Primary treatment
3. Sludge treatment
4. Tertiary treatment
Read the following four statements (a-d):
| a. | Colostrum is recommended for the new born because it is rich in antigens. |
| b. | Chikungunya is caused by a Gram-negative bacterium. |
| c. | Tissue culture has proved useful in obtaining virus-free plants. |
| d. | Beer is manufactured by distillation of fermented grape juice. |
How many of the above statements are wrong?
| 1. | Four | 2. | One |
| 3. | Two | 4. | Three |
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