Q. No.In the light of recent classification of living organisms into three domains of life (bacteria, archaea and eukarya), which one of the following statements is true about archaea
1. Archaea completely differ from both prokaryotes and eukaryotes
2. Archaea completely differ from prokaryotes
3. Archaea resemble eukarya in all respects
4. Archaea have some novel features that are absent in both prokaryotes and eukaryotes
Thermococcus, Methanococcus and Methanobacterium exemplify
1. Bacteria whose DNA is relaxed or positively supercoiled but which have a cytoskeleton as well as mitochondria
2. Bacteria that contain a cytoskeleton and ribosomes
3. Archaebacteria that contain protein homologous to eukaryotic core histones
4. Archaebacteria that lack any histones resembling those found in eukaryotes but whose DNA is negatively supercoiled
A location with luxuriant growth of lichens on the trees indicates that the:
| 1. | Trees are very healthy | 2. | Trees are heavily infested |
| 3. | Location is highly polluted | 4. | Location is not polluted |
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.
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
Which disease of man is similar to cattle's, bovine spongiform encephalopathy:
| 1. | Encephalitis | 2. | Jacob-Creutzfeldt disease |
| 3. | Spongiocitis of cerebrum | 4. | Spondylitis |
Which pair belongs to basidiomycetes?
| 1. | Puffball and Claviceps | 2. | Peziza and Stink Horn |
| 3. | Morchella and Mushroom | 4. | Bracket fungi and Puffballs |
Which one single organism or the pair of organisms is correctly assigned to its or their named taxonomic group?
1. Paramoecium and Plasmodium belong to the same kingdom as that of Penicillium
2. Lichen is a composite organism formed from the symbiotic association of an algae and a protozoan
3. Yeast used in making bread and beer is a fungus
4. Nostoc and Anabaena are examples of protista
The imperfect fungi which are decomposer of litter and help in mineral cycling belong to:
| 1. | Basidiomycetes | 2. | Phycomycetes |
| 3. | Ascomycetes | 4. | Deuteromycetes |
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) |
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