Q. No.The vast majority of bacteria are:
| 1. | Heterotrophs | 2. | Photoautotrophs |
| 3. | Chemosynthetic autotrophs | 4. | Methanotrophs |
Match the bacteria in Column I with its shape in Column II and select the correct option from the codes given below:
|
COLUMN I |
|
COLUMN II |
|
|
A |
Bacillus |
a |
Rod |
|
B |
Coccus |
b |
Spherical |
|
C |
Spirilla |
c |
Spiral |
|
D |
Vibrio |
d |
Comma |
Codes
| A | B | C | D | |
| 1. | a | b | c | d |
| 2. | b | a | c | d |
| 3. | a | d | c | b |
| 4. | b | a | d | c |
Bacteria are of varied shapes. Identify the correct match for A, B and C in the given figure:
| A | B | C | |
| 1. | Spirocheate | Streptobacillus | Staphylococcus |
| 2. | Vibrios | Staphylobacillus | Streptococcus |
| 3. | Vibrios | Streptobacillus | Staphylococcus |
| 4. | Spirochaete | Staphylobacillus | Streptococcus |
Methanogens are commonly present in:
1. Alimentary canal of the lower invertebrates
2. Symbiotic relationships with xerophytic plants
3. Gut of ruminant animals
4. Close associations with corals
Halophiles are archaebacteria adapted to extreme:
| 1. | Hot habitats | 2. | Saline habitats |
| 3. | Marshy habitats | 4. | Cold habitats |
Both Archaebacteria and Eubacteria:
| I: | have a similar structure of cell wall |
| II: | are members of Kingdom Monera |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Cyanobacteria:
| I: | are eubacteria |
| II: | have chlorophyll a similar to green plants |
| III: | can fix atmospheric nitrogen |
1. Only III is correct
2. Only I and II are correct
3. Only II and III are correct
4. I, II and III are correct
Cyanobacteria:
| I. | are also referred to as ‘blue green algae’. |
| II. | are photosynthetic autotrophs with chlorophyll a similar to green plants. |
| III. | often form blooms in polluted water bodies. |
| IV. | some of them can fix atmospheric nitrogen in specialised cells called hetrocysts. |
In light of the above given statements:
| 1. | Only I, II and IV are correct | 2. | Only I, II and III are correct |
| 3. | All statements are correct | 4. | Only I and III are correct |
Which of the following plant diseases is not caused by a fungus?
1. Late blight of potato
2. Loose smut of wheat
3. Canker in citrus
4. Powdery mildew of grape vine
Identify the incorrect statement regarding true bacteria?
| 1. | As a group, they exhibit maximum metabolic diversity. |
| 2. | Chemosynthetic autotrophic bacteria play a great role in recycling nutrients like nitrogen, phosphorous, iron and sulphur. |
| 3. | Heterotrophic bacteria are the most abundant in nature. |
| 4. | Bacteria reproduce mainly by fission but sometimes under favourable conditions, they produce spores. |
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