Viruses Biology Test Series for NEET - 2020

Test Preparation on Viruses - Biology Test Series for NEET - 2020

1.

The Tobacco mosaic virus was crystallized for first time by

1W.M. Stanley
2E. C. Stackmann
3A. K. Smith
4Ivanowski

2.

The genome of Influenza virus is a

1Single-stranded RNA (-)
2Single-stranded RNA (+)
3Double-stranded RNA
4Single-stranded DNA

3.

A virus containing ssRNA act as a template for DNA
synthesis is called as

1Polio virus
2Retro virus
3Pox virus
4Adeno virus

4.

The genetic material in viruses is

1Only RNA
2Only DNA
3RNA and DNA both
4RNA or DNA i.e. one nucleic acid in a virus

5.

Which of the following is false

1Most plant viruses are RNA viruses
2Most animal viruses are DNA viruses
3TMV has double stranded RNA molecule
4T4 bacteriophage has double stranded DNA molecule

6.

Algal viruses are known as

1Binal viruses
2Cyanophages
3Mycophages
4Phycophages

7.

Select the wrong statements

1W.M. Stanley showed that viruses could be crystallized
2The term ‘contagium vivum fluidum’ was coined by M.W. beijerinck
3Mosaic disease in tobacco and AIDS in human being are caused by viruses
4The viroids were discovered by D. J. lvanowski

8.

Viroids differ from viruses in having

1DNA molecules with protein coat
2DNA molecules without protein coat
3RNA molecules with protein coat
4RNA molecules without protein coat

(d) Viruses are made up of proteins and nucleic acids while
viroids are naked RNA molecules.

9.

Which of the following statements is wrong for viroids

1They lack a protein coat
2They are smaller than viruses
3They cause infections
4Their RNA is of high molecular weight

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