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
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) |
In fungi, asexual reproduction takes place by
1. Fission, conidia and ascospores
2. Conidia, hypnospores and zoospores
3. Conidia, sporangiospores and zoospores
4. Sporangiospores, conidia and basidiospores
Select the incorrect statement with respect to fungi
1. | Mycelium is consist of long slender thread like structures called hyphae |
2. | Aseptate and multinucleate hyphae is called coenocytic hyphae |
3. | Dolipore septum is characteristic of class ascomycetes. |
4. | The cell wall is composed of chitin and polysaccharides |
Which of the following statement is correct for Deuteromycetes?
1. | A large number of them are decomposers of litter, but do not help in mineral cycling |
2. | Mycelium is septate and branched |
3. | They may have three names, one for vegetative stage and two for asexual stage |
4. | Common asexual spore is oidia |
Choose the correct option for the given below figures.
1. Peritrichous bacteria
2. They do not contain both RNA and DNA
3. Presence of non-cellulosic cell wall
4. Presence of cyclosis
Which of the following is not correctly matched?
1. | Inert Crystals - Virus | 2. | Free RNA - Viroids |
3. | Normal protein - Prions | 4. | Symbionts - Lichen |
Which of the following fungus lacks dikaryophase?
1. Claviceps
2. Puccinia
3. Aspergillus
4. Trichoderma
Which of the following have pigment similar to higher
plants?
1. Group which causes red tide.
2. Group which is chief producer of ocean.
3. Group when deprived of light behaves as heterotroph.
4. Group where spore have cellulosic cell wall
In case of protists sexual reproduction can be by
1. Cell fusion
2. Zygote formation
3. Triple fusion
4. Both 1 and 2