Q. No.Which of the following, in sewage treatment, removes suspended solids?
1.
Secondary treatment
2.
Primary treatment
3.
Sludge treatment
4.
Tertiary treatment
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Select the mismatch:
1. Rhodospirillum - Mycorrhiza
2. Anabaena - Nitrogen fixer
3. Rhizobium - Alfalfa
4. Frankia - Alnus
Which of the following is correctly matched for the product produced by them?
1. Methanobacterium : Lactic acid
2. Penicillium notatum : Acetic acid
3. Saccharomyces cerevisiae : Ethanol
4. Acetobacter aceti : Antibiotics
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Conversion of milk to curd improves its nutritional value by increasing the amount of
1. Vitamin B12
2. Vitamin A
3. Vitamin D
4. Vitamin E
BOD of waste water is estimated by measuring the amount of:
1. total organic matter
2. biodegradable organic matter
3. oxygen evolution
4. oxygen consumption.
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What would happen if oxygen availability to activated sludge flocs is reduced?
| 1. | It will slow down the rate of degradation of organic matter. |
| 2. | The center of flocs will become anoxic, which would cause the death of bacteria and eventually breakage of flocs. |
| 3. | Flocs would increase in size as anaerobic bacteria would grow around flocs. |
| 4. | Protozoa would grow in large numbers. |
What important nutrient is added to the curd that is produced with the help of LAB [Lactic Acid Bacteria]?
| 1. | Vitamin A | 2. | Cyanocobalamin |
| 3. | Essential amino acids | 4. | Essential fatty acids |
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The large holes in ‘Swiss Cheese’ are due to the production of a large amount of carbon dioxide by:
1. Propionibacterium shermanii
2. Methylophilus methylotrophus
3. Penicillium roqueforti
4. Penicillium camemberti
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Which of the following alcoholic drinks are produced without distillation?
1. Whiskey and Brandy
2. Brandy and Rum
3. Wine and Beer
4. Wine and Brandy
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The full potential of penicillin as an antibiotic was established by:
| 1. | Alexander Fleming | 2. | Florey and Chain |
| 3. | Avery and McCarty | 4. | Hershey and Chase |
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