Q. No.Which group of bacteria are important decomposers, helpful in production of antibiotics and curd from milk and fix nitrogen in legume plants?
1. Photosynthetic autotrophs
2. Chemosynthetic autotrophs
3. Heterotrophs
4. Methanogens
1. Photosynthetic autotrophs
2. Chemosynthetic autotrophs
3. Heterotrophs
4. Methanogens
The following are not mentioned in the five kingdom classification of Whittaker except:
1. Viruses
2. Viroids
3. Euglena
4. Lichens
Potato Spindle Tuber Disease is caused by a pathogen that is:
| 1. | A nucleocapsid |
| 2. | A low molecular weight free RNA |
| 3. | An abnormally folded protein |
| 4. | A protozoan |
Prion is:
1. A nucleocapsid
2. A low molecular weight free RNA
3. An abnormally folded protein
4. A protozoan
The term ‘blue mould’ is generally used for a fungus of the genus:
1. Mucor
2. Rhizopus
3. Albugo
4. Penicillium
Identify the incorrectly matched pairs:
| I: | Louis Pasteur: Gave the name virus |
| II: | D. J Ivanowsky: Recognized the causal agents of mosaicism in tobacco to be larger than bacteria |
| III: | M. W. Beijerinck : Contagium vivum fluidum |
| IV: | W. M. Stanley: Discovered HIV |
2. I and II
3. III and IV
4. II and IV
Which of the following is not a characteristic of dinoflagellates?
| 1. | Mostly fresh water and photosynthetic |
| 2. | Cell wall with stiff cellulosic plates |
| 3. | Two flagella |
| 4. | Various colored pigments in the cell |
The chief producers in the oceans are:
| 1. | Floating hydrophytes | 2. | Blue green algae |
| 3. | Desmids | 4. | Diatoms |
The correct chronology of the steps seen in the sexual cycle in fungi will be:
1. Plasmogamy – Karyogamy – Meiosis in zygote
2. Karyogamy – Plasmogamy – Meiosis in zygote
3. Plasmogamy – Meiosis in zygote – Karyogamy
4. Karyogamy – Meiosis in zygote – Plasmogamy
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