Q. No.Viruses are considered at the borderline of living and non-living. Consider the following statements:
Statement I: Viruses can be crystallised and stored indefinitely without loss of infectivity, which is a non-living characteristic
Statement II: Viruses possess genetic material and can evolve through mutations, which are living characteristics
1. Statement I is correct but Statement II is incorrect
2. Statement I is incorrect but Statement II is correct
3. Both statements are correct and Statement II explains Statement I
4. Both statements are correct but Statement II does not explain Statement I
Statement I: Viruses can be crystallised and stored indefinitely without loss of infectivity, which is a non-living characteristic
Statement II: Viruses possess genetic material and can evolve through mutations, which are living characteristics
1. Statement I is correct but Statement II is incorrect
2. Statement I is incorrect but Statement II is correct
3. Both statements are correct and Statement II explains Statement I
4. Both statements are correct but Statement II does not explain Statement I
Subtopic: Virus, Viroids & Prions |
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Subtopic: Virus, Viroids & Prions |
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Viroids were discovered by D.J. Ivanowsky and consist of free RNA of low molecular weight.
1. True
2. False
1. True
2. False
Subtopic: Virus, Viroids & Prions |
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Who first demonstrated that viruses could be crystallised like chemicals?
1. Beijerinck
2. Stanley
3. Ivanowsky
4. Pasteur
1. Beijerinck
2. Stanley
3. Ivanowsky
4. Pasteur
Subtopic: Virus, Viroids & Prions |
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Subtopic: Virus, Viroids & Prions |
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Subtopic: Virus, Viroids & Prions |
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Viroids differ from viruses in —
1. Being larger
2. Having DNA only
3. Having RNA but no protein coat
4. Having only protein coat
1. Being larger
2. Having DNA only
3. Having RNA but no protein coat
4. Having only protein coat
Subtopic: Virus, Viroids & Prions |
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Viruses that infect animals have single-stranded RNA, while viruses that infect plants have either single or double-stranded RNA or double-stranded DNA.
1. True
2. False
1. True
2. False
Subtopic: Virus, Viroids & Prions |
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Prions differ from viruses in —
1. Being infectious proteins without nucleic acid
2. Possessing both DNA and RNA
3. Being non-infectious particles
4. Having lipid envelope
1. Being infectious proteins without nucleic acid
2. Possessing both DNA and RNA
3. Being non-infectious particles
4. Having lipid envelope
Subtopic: Virus, Viroids & Prions |
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Viruses are considered truly living organisms because they contain genetic material (either RNA or DNA) and can replicate themselves independently outside a host cell.
1. True
2. False
1. True
2. False
Subtopic: Virus, Viroids & Prions |
87%
Level 1: 80%+
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