Nucleic acid is absent in:
1. virus
2. viroid
3. prion
4. mycoplasma
In most fungi, the cell wall is chiefly made of:
1. cellulose
2. chitin
3. protein
4. lipid
Heterocysts are present in:
1. Riccia
2. Ulothrix
3. Albugo
4. Nostoc
Viruses that infect bacterial multiplication and cause their lysis, are called:
1. Lysosomes
2. lipolytic
3. lytic
4. lysogenic
1. | A toxic protein that stays inside the bacterial cell |
2. | A toxic protein that is excreted into the medium |
3. | Lipopolysaccharide located on the surface of the bacteria |
4. | None of the above |
1. Bacillarophyceae
2. Xanthophyceae
3. Rhodophyceae
4. Chrysophyceae
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. |
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. | 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 |
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 |