Viruses, Viroids and Prions
Viruses, Viroids and Prions: Overview
This Topic covers sub-topics such as Bacteriophage, Tobacco Mosaic Virus, Prions, Classification of Viruses and, Viroids
Important Questions on Viruses, Viroids and Prions

Tobacco mosaic virus is a tubular filament of size

Cauliflower mosaic virus contains:

Influenza virus has –

Tobacco Mosaic Virus (TMV) genes are -

What is scrapie disease?

Which is true about viroids-
I. Low molecular weight DNA molecule.
II. Lack protein coat.
III. Single stranded RNA
Mark the incorrect option.

What is meaning of virorid?

Bovine spongiform encephalopathy is caused by

Match the following lists:
List-I | List-II | List-III | |||
A | HIV | (i) | Shelter | (I) | Auxospores |
B | Mycobiont | (ii) | TMV | (II) | RNA |
C | Deuteromycetes | (iii) | Pennales | (III) | Trichoderma |
D | Cell wall with silica | (iv) | Conidia | (IV) | Mineral absorption |
The correct match is:

What does indicate in the figure ?

Which of the following can replicate within bacterial cells independently of chromosomal DNA?

Leucocytes are known as WBCs as they are colourless due to

Bovine spongiform encephalopathy, a bovine disease is related to which human disease?

What is indicates A to D in this figure?

Identify the parts A and B shown in this figure.

The molecular weight of RNA of viroids is


'Viroids' was discovered by

Bacteriophage generally has
