Q. No.
Assertion(A): Diatomaceous earth is used in polishing, filtration of oil and syrups.
Reason(R):
Diatomaceous earth is gritty due to presence of silica.
1.
Both (A) and (R) are True, and (R) correctly explains (A)
2.
Both (A) and (R) are True, but (R) does not correctly explain (A)
3.
(A) is True, but (R) is False
4.
Both (A) and (R) are False
Assertion(A):
Which of the following is an incorrect statement
regarding fungi?
1. Wheat rust causing agent is Puccinia.
2. Penicillium is a source of antibiotic.
3. The cell walls of fungi are composed of
peptidoglycans.
4. Fungi prefer to grow in warm and humid places.
Which of the following statements is incorrect?
| 1. | Prions consist of abnormally folded proteins |
| 2. | Viroids lack a protein coat |
| 3. | Viruses are obligate parasites |
| 4. | Infective constituent in viruses is the protein coat |
Match the Column-I with Column-II
|
Column-I |
Column-II |
||
|
(a) |
Saprophyte |
(i) |
Symbiotic association of fungi with plant roots |
|
(b) |
Parasite |
(ii) |
Decomposition of dead organic materials |
|
(c) |
Lichens |
(iii) |
Living on living plants or animals |
|
(d) |
Mycorrhiza |
(iv) |
Symbiotic association of algae and fungi |
Choose the correct answer from the options given below:
| (a) | (b) | (c) | (d) | |
| 1. | (ii) | (iii) | (iv) | (i) |
| 2. | (i) | (ii) | (iii) | (iv) |
| 3. | (iii) | (ii) | (i) | (iv) |
| 4. | (ii) | (i) | (iii) | (iv) |
Which of the following statements is incorrect?
| 1. | Yeasts have filamentous bodies with long thread-like hyphae. |
| 2. | Morels and truffles are edible delicacies. |
| 3. | Claviceps is a source of many alkaloids and LSD. |
| 4. | Conidia are produced exogenously and ascospores endogenously. |
Evolutionary history of an organism is known as:
1. Phylogeny
2. Ancestry
3. Palaeontology
4. Ontogeny
The thalloid body of a slime mould (Myxomycetes) is known as:
1. protonema
2. Plasmodium
3. fruiting body
4. mycelium
State True (T) or False (F) to the given statements and select the correct option
| (A) | Abundance of lichens in any area indicates that the area is highly polluted with SO2. |
| (B) | Mycobiont partner of lichens is always heterotrophic. |
| (C) | Body of lichens is made up of phycobionts only. |
(A) (B) (C)
1. T T F
2. F T F
3. F F F
4. T F F
Which of the given statement is not true for viruses?
| 1. | They are nucleoproteins where protein is infectious in nature. |
| 2. | They can be crystallized and crystals consist largely of proteins. |
| 3. | Virus means venom or poisonous fluid. |
| 4. | A virus can never have both DNA and RNA as its genetic material. |
Organisms responsible for causing ‘red tide’ are also
characterized by
1. Presence of stiff cellulosic plates.
2. Obligate saprophyte.
3. Presence of two longitudinal flagella.
4. Filamentous body made up of trichomes.
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