Which of the following viruses has both DNA and RNA as its genetic material?
1. | Retroviruses | 2. | Bacteriophages |
3. | Plant viruses | 4. | None |
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Match each item in Column I with one in Column II and choose the correct answer from the codes given:
Column I |
Column II |
A. Mucor |
a. Pin mould |
B. Rhizopus |
b. Bread mould |
C. Albugo |
c. White rust |
D. Pythium |
d. Damping-off of seedlings |
Codes
A | B | C | D | |
1. | a | b | c | d |
2. | b | a | c | d |
3. | a | b | d | c |
4. | b | a | d | c |
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Morels and truffles are edible fungi belonging to the class:
1. | Phycomycetes | 2. | Ascomycetes |
3. | Basidiomycetes | 4. | Deuteromycetes |
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A fungus used extensively in biochemical and genetic work is:
1. | Neurospora | 2. | Trichoderma |
3. | Paecilomyces | 4. | Streptomyces |
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A symbiotic relation between fungi and the roots of higher plants is called as:
1. | Lichen | 2. | Mycorrhiza |
3. | Amensal | 4. | Proto-cooperation |
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The disease caused by prions in humans is known as:
1. Bovine spongiform encephalopathy
2. Scrapie
3. CJD [Creutzfeldt Jakob Disease]
4. Infectious mononucleosis
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In the Two Kingdom classification, the Kingdom Plantae was erroneous with some major issues that include:
I: | Placing bacteria and blue green algae with eukaryotic groups |
II: | Grouping together the unicellular organisms with multicellular ones |
III: | Placing heterotrophic fungi with autotrophic plants |
1. | I and II only | 2. | I and III only |
3. | II and III only | 4. | I, II and III |
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What is not true regarding sexual reproduction in basidiomycetes?
1. | Sex organs are well developed |
2. | Plasmogamy is brought about by fusion of two vegetative or somatic cells of different strains or genotypes |
3. | Karyogamy and meiosis take place in basidium, producing four basidiospores |
4. | Basidiospores are produced exogenously on the basidium |
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Viruses are:
1. Obligate intracellular parasites
2. Obligate extracellular parasites
3. Facultative parasites
4. Free living, outside a living cell
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The cell walls of diatoms are ‘indestructible’ as they are embedded with:
1. | Silica | 2. | Chitin |
3. | Calcium | 4. | Raphides |
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