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: Diatomaceous earth is used in polishing, filtration of oil and syrups.
Reason: Diatomaceous earth is gritty due to presence of silica.
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.
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. |
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
The motile bacteria are able to move by:
1. fimbriae
2. flagella
3. cilia
4. pili
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. |