Q. No.Which of the following viruses has both DNA and RNA as its genetic material?
1.
Retroviruses
2.
Bacteriophages
3.
Plant viruses
4.
None
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 |
Morels and truffles are edible fungi belonging to the class:
| 1. | Phycomycetes | 2. | Ascomycetes |
| 3. | Basidiomycetes | 4. | Deuteromycetes |
A fungus used extensively in biochemical and genetic work is:
| 1. | Neurospora | 2. | Trichoderma |
| 3. | Paecilomyces | 4. | Streptomyces |
A symbiotic relation between fungi and the roots of higher plants is called as:
| 1. | Lichen | 2. | Mycorrhiza |
| 3. | Amensal | 4. | Proto-cooperation |
The disease caused by prions in humans is known as:
1. Bovine spongiform encephalopathy
2. Scrapie
3. CJD [Creutzfeldt Jakob Disease]
4. Infectious mononucleosis
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 |
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 |
Viruses are:
1. Obligate intracellular parasites
2. Obligate extracellular parasites
3. Facultative parasites
4. Free living, outside a living cell
The cell walls of diatoms are ‘indestructible’ as they are embedded with:
| 1. | Silica | 2. | Chitin |
| 3. | Calcium | 4. | Raphides |
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