NEET Botany
Virus Viroids Prions
Low Priority
Consistency: 35%
Weightage: 7 / 20 Yrs
High-Yield Trend
1
2019 1
2017 1
2015 1
2012 2
2010 1
2009 1
2006 Questions 8 MCQs
01
PYQ 2006
easy
botany ID: neet-200
The causative agent of mad-cow disease is a:
1. bacterium
2. prion
3. worm
4. virus
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02
PYQ 2009
easy
botany ID: neet-200
T.O. Diener discovered a:
1. free infectious RNA
2. free infectious DNA
3. infectious protein
4. bacteriophage
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03
PYQ 2010
easy
botany ID: neet-201
Virus envelope is known as:
1. capsid
2. virion
3. nucleoprotein
4. core
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04
PYQ 2010
easy
botany ID: neet-201
Infectious proteins are present in:
| 1. | geminiviruses | 2. | prions |
| 3. | viroids | 4. | satellite viruses |
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05
PYQ 2012
medium
botany ID: neet-201
Which statement is wrong for viruses?
| 1. | All are parasites |
| 2. | All of them have helical symmetry |
| 3. | They have the ability to synthesize nucleic acids and proteins |
| 4. | Antibiotics have no effect on them |
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06
PYQ 2015
easy
botany ID: neet-201
Select the wrong statement:
| 1. | The viroids were discovered by D.J lvanovsky. |
| 2. | W.M. Stanley showed that viruses could be crystallized. |
| 3. | The term 'contagium vivum fluidum' was coined by MW Beijerinck. |
| 4. | Mosaic disease in tobacco and AIDS in human beings are caused by viruses. |
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07
PYQ 2017
easy
botany ID: neet-201
Viroids differ from viruses in having;
| 1. | DNA molecules without protein coat |
| 2. | RNA molecules with protein coat |
| 3. | RNA molecules without protein coat |
| 4. | DNA molecules with protein coat |
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08
PYQ 2019
easy
botany ID: neet-201
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 |
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