Which of the following statements is wrong for viroids?
1. Their RNA is of high molecular weight
2. They lack a protein coat
3. They are smaller than viruses
4. They cause infections
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Viroids differ from viruses in having
1. DNA molecules with protein coat
2. DNA molecules without protein coat
3. RNA molecules with protein coat
4. RNA molecules without protein coat
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Naked cytoplasm, multinucleated and saprophytic are the characteristics of
1. | Monera | 2. | Protista |
3. | Fungi | 4. | Slime molds |
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An association between roots of higher plants and fungi is called
1. | Lichen | 2. | Fern |
3. | Mycorrhiza | 4. | BGA |
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Contagium vivum fluidum was proposed by
1. | D. J. Ivanowsky | 2. | M. W. Beijerinek |
3. | Stanley | 4. | Robert Hooke |
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With respect to fungal sexual cycle, choose the correct sequence of events
1. Karyogamy, Plasmogamy and Meiosis
2. Meiosis, Plasmogamy and Karyogamy
3. Plasmogamy, Karyogamy and Meiosis
4. Meiosis, Karyogamy and Plasmogamy
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Members of phycomycetes are found
I. | In aquatic habitats |
II. | On decaying wood |
III. | In moist and damp places |
IV. | As obligate parasites on plant |
Choose from the following options:
1. None of the above | 2. I and IV |
3. II and III | 4. All of the above |
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Match the bacteria in Column I with its shape in Column II and select the correct option from the codes given below:
COLUMN I |
|
COLUMN II |
|
A |
Bacillus |
a |
Rod |
B |
Coccus |
b |
Spherical |
C |
Spirilla |
c |
Spiral |
D |
Vibrio |
d |
Comma |
Codes
A | B | C | D | |
1. | a | b | c | d |
2. | b | a | c | d |
3. | a | d | c | b |
4. | b | a | d | c |
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In the symbiotic relation lichen, the mycobiont does not:
1. prepare food for the other partner
2. provide shelter to the other partner
3. absorb mineral nutrients for the other partner
4. absorb water for the other partner
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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 |
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