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Viroids discovered by Diener (1971) are ...

Viroids discovered by Diener (1971) are infectious agents and cause diseases in plants only. They differ from viruses in being

A

naked ssDNA molecules without protein coat

B

naked ssRNA molecule of 250-400 nucleotides without protein coat

C

naked DNA packaged with viral genome

D

satellite DNA packaged with viral genome

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The correct Answer is:
B
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TRUEMEN BIOLOGY ENGLISH-BIOLOGICAL CLASSIFICATION-MULTIPLE CHOICE QUESTIONS
  1. Prions are composed largely of

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  2. The Nobel Prize of 1997 went tofor the study of prions (the causal age...

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  3. Viroids discovered by Diener (1971) are infectious agents and cause di...

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  4. RNA particles causing symptoms like that of a viral disease are known ...

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  5. Bovine Spongiform Encephalopathy (BSE) disease is related to which hum...

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  6. Which of the following is plant viral disease?

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  7. AIDS was first reported in

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  8. Mumps (inflammation of parotid salivary gland) is a

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  9. Potato tuber spindle disease is caused by

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  10. All are neurotropic (involving central nervous system) viral diseases ...

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  11. Common cold, the most contagious disease is due to

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  12. Which one is not a viral disease of animals ?

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  13. Who cultured the virus (Polio virus) for the first time in human cells

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  14. Potato leaf roll and Papaya leaf curl are due to

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  15. HIV/oncogenic viruses/retroviruses are dangerous and cause disorder in

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  16. The virus replicated in arthropod, whith is its intermediate host and ...

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  17. Retroviruses are implicated as a cause of cancer in man because they

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  18. Viruses are not affected by antibiotics because

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  19. Name the group of viruses causing dengue fever and yellow fever.

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  20. Dengue (the break-bone fever) is spread by

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