Q. No.
Which of the following statements about viruses is correct ?
1. Viruses contain either DNA or RNA
2. Viruses possess their own metabolic system
3. Viruses are facultative parasites
4. Viruses are readily killed by antibiotics
Barophilic prokaryotes
1. Occur in water containing high concentration of barium hydroxide
2. Grow slowly in alkaline frozen lakes at high altitude
3. Grow and multiply in very deep marine sediments
4. Readily grow and divide in sea water enriched with soluble salt of barium
Auxospores and hormocysts are formed respectively by
1. Some diatoms and several cyanobacteria
2. Some cyanobacteria and several diatoms
3. Several cyanobacteria and several diatoms
4. Several diatoms and few cyanobacteria
Which of the following environmental conditions are essential for optimum growth of Mucor on a piece of bread?
| (a) | Temperature of about 25ºC |
| (b) | Temperature of about 5% |
| (c) | Relative humidity of about 5% |
| (d) | Relative humidity of about 95% |
| (e) | A shaded place |
| (f) | A brightly illuminated place. |
Choose the answer from the following options:
| 1. | b, c and e only | 2. | a, c and e only |
| 3. | a, d and e only | 4. | b, d and e only |
Which pair belongs to basidiomycetes?
| 1. | Puffball and Claviceps | 2. | Peziza and Stink Horn |
| 3. | Morchella and Mushroom | 4. | Bracket fungi and Puffballs |
Which of the following is a filamentous nitrogen fixing bacterium is present in root nodules of non-leguminous plant?
1. Cicer arietinum
2. Casurina equisetifolia
3. Cycas revoluta
4. Crotalaria juncea
Which is wrong about mycoplasma?
1. They are called PPLO
2. They are pleomorphic
3. They are sensitive to penicillin
4. They cause diseases in plants
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