Q. No.In the five-kingdom classification, Chlamydomonas and Chlorella have been included in:
1.
Algae
2.
Plantae
3.
Monera
4.
Protista
Given below is the diagram of a bacteriophage. In which one of the options, all the four parts A, B, C and D are correct?
| A | B | C | D | |
| 1. | Sheath | Collar | Head | Tail fibres |
| 2. | Head | Sheath | Collar | Tail fibres |
| 3. | Collar | Tail fibres | Head | Sheath |
| 4. | Tail fibres | Head | Sheath | Collar |
Black (stem) rust of wheat is caused by:
1. Ustilago nuda
2. Puccinia graminis
3. Xanthomonas oryzae
4. Alternaria solani
Select the correct combination of the statements (a-d) regarding the characteristics of certain organisms:
| (a) | Methanogens are archaebacteria that produce methane in marshy areas |
| (b) | Nostoc is a filamentous blue-green alga that fixes atmospheric nitrogen |
| (c) | Chemosynthetic autotrophic bacteria synthesize cellulose from glucose |
| (d) | Mycoplasma lack a cell wall and can survive without oxygen |
The correct statements are:
| 1. | (a), (b) and (c) | 2. | (b), (c) and (d) |
| 3. | (a), (b) and (d) | 4. | (b) and (c) |
Which one of the following sets of items in options 1 – 4 are correctly categorized with one exception in it?
| ITEMS | CATEGORY | EXCEPTION | |
| 1. | Kangaroo, Koala, wombat | Australian marsupials | Wombat |
| 2. | Plasmodium, Cuscuta, Trypanosoma | Protozoan parasites | Cuscuta |
| 3. | Typhoid, Pneumonia, Diphtheria | Bacterial diseases | Diphtheria |
| 4. | UAA, UAG, UGA | Stop codons | UAG |
How many organisms in the list given below are autotrophs?
| Lactobacillus, Nostoc, Chara, Nitrosomonas, Nitrobacter, Streptomyces, Sacharomyces, Trypanosoma, Porphyra, Wolfia |
1. Five
2. Six
3. Three
4. Four
Auxospores and hormocysts are formed respectively, by:
1. Some cyanobacteria and many diatoms
2. Several diatoms and a few cyanobacteria
3. Several cyanobacteria and several diatoms
4. Some diatoms and several cyanobacteria
There exists a close association between the alga and the fungus within a lichen. The fungus:
| 1. | Provides food for the alga |
| 2. | Provides protection, anchorage and absorption for the alga |
| 3. | Fixes the atmospheric nitrogen for the alga |
| 4. | Releases oxygen for the alga |
Barophilic prokaryotes:
| 1. | Grow slowly in highly alkaline frozen lakes at high altitudes |
| 2. | Grow and multiply in very deep marine sediments |
| 3. | Readily grow and divide in seawater enriched in any soluble salt of barium |
| 4. | Occur in water containing high concentrations of barium hydroxide |
What is correct for the stages of Puccinia:
1. Telia and aecia on wheat
2. Telia and uredo stage on wheat
3. Telia and aecia on barberry
4. None
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