Q. No.Which of the following statements is correct?
1. Lichens do not grow in polluted areas.
2. Algal component of lichens is called mycobiont.
3. Fungal component of lichens is called phycobiont.
4. Lichens are not good pollution indicators.
2. Algal component of lichens is called mycobiont.
3. Fungal component of lichens is called phycobiont.
4. Lichens are not good pollution indicators.
Match the organisms in Column-I with habitats in Column-II.
| Column-I | Column-II | ||
| (a) | Halophiles | (i) | Hot springs |
| (b) | Thermoacidophiles | (ii) | Aquatic environment |
| (c) | Methanogens | (iii) | Guts of ruminants |
| (d) | Cyanobacteria | (iv) | Salty areas |
Select the correct answer from the options given below:
| Options: | (a) | (b) | (c) | (d) |
| 1. | (iv) | (i) | (iii) | (ii) |
| 2. | (i) | (ii) | (iii) | (iv) |
| 3. | (iii) | (iv) | (i) | (i) |
| 4. | (ii) | (iv) | (iii) | (i) |
Five kingdom system of classification suggested by R.H. Whittaker is not based on:
1. Presence or absence of a well defined nucleus
2. Mode of reproduction
3. Mode of nutrition.
4. Complexity of body organization
Mad cow disease in cattle is caused by an organism which has:
1. Inert crystalline
2. Abnormally folded protein
3. Free RNA without protein coat
4. Free DNA without protein coat
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
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 |
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:
| Options: | (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. |
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