Assertion(A): Viruses are smaller than bacteria.
Reason(R): Viruses pass through bacteria-proof filters.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic: Â Virus, Viroids & Prions |
Level 4: Below 35%
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Assertion(A): The RNA of the viroid is of low molecular weight.
Reason(R): This RNA is able to cause neurological diseases in humans.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Reason(R): This RNA is able to cause neurological diseases in humans.
Choices for Assertions and reasons:
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic: Â Virus, Viroids & Prions |
 62%
Level 2: 60%+
Hints
Assertion(A): Archaebacteria are special bacteria.
Reason(R): They live in harsh habitats.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Reason(R): They live in harsh habitats.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. (A) is false, but (R) is true.
Subtopic: Â Kingdom Monera: Bacterial Classification |
 80%
Level 1: 80%+
Hints
Assertion (A): Dikaryon is observed in Ascomycetes and Basidiomycetes.
Reason (R): In some fungi karyogamy is delayed after plasmogamy.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. Both (A) and (R) are false.
Reason (R): In some fungi karyogamy is delayed after plasmogamy.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. Both (A) and (R) are false.
Subtopic: Â Kingdom Fungi: Ascomycetes |Â Kingdom Fungi: Basidomycetes |
 65%
Level 2: 60%+
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Assertion (A): Viruses are an exception to cell theory.
Reason (R): Viruses are noncellular in nature.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. Both (A) and (R) are false.
Reason (R): Viruses are noncellular in nature.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. Both (A) and (R) are false.
Subtopic: Â Virus, Viroids & Prions |
 83%
Level 1: 80%+
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Assertion (A): Archaebacteria are most resistant to adverse environmental conditions.
Reason (R): In archaebacteria, cell wall is highly resistant and complex.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. Both (A) and (R) are false.
Reason (R): In archaebacteria, cell wall is highly resistant and complex.
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true, but (R) is not the correct explanation of (A).
3. (A) is true, but (R) is false.
4. Both (A) and (R) are false.
Subtopic: Â Kingdom Monera: Bacterial Classification |
 91%
Level 1: 80%+
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Chemosynthetic autotrophic bacteria play a great role in:
| 1. | forming blooms in polluted water bodies |
| 2. | recycling nutrients like nitrogen, phosphorous, iron and sulphur |
| 3. | making curd from milk |
| 4. | fixing nitrogen in legume roots |
Subtopic: Â Kingdom Monera: Introduction |
 83%
Level 1: 80%+
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A dikaryophase of fungus is commonly seen in the sexual reproduction of:
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III
| I: | Phycomycetes |
| II: | Ascomycetes |
| III: | Basidiomycetes |
2. Only I and III
3. Only II and III
4. I, II and III
Subtopic: Â Kingdom Fungi: Introduction |Â Kingdom Fungi: Ascomycetes |Â Kingdom Fungi: Basidomycetes |
 88%
Level 1: 80%+
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The infectious agent that causes potato spindle tuber disease is:
| 1. | a free RNA lacking a protein coat |
| 2. | a nucleocapsid |
| 3. | an abnormally folded protein |
| 4. | a ribozyme |
Subtopic: Â Virus, Viroids & Prions |
 82%
Level 1: 80%+
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Bacteria are grouped under four categories based on their shape. Identify the incorrect match:
| 1. | Coccus | Spherical |
| 2. | Bacillus | Rod-shaped |
| 3. | Vibrium | Icosahedron |
| 4. | Spirillum | Spiral |
Subtopic: Â Kingdom Monera: Introduction |
 94%
Level 1: 80%+
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