Viruses, Viroids and Prions

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Viruses, Viroids and Prions: Overview

This topic covers concepts, such as Prions, Obligate Parasites, Destructive Parasites, Viruses, Classification of Viruses, Tobacco Mosaic Virus, Bacteriophage, Viroids, etc.

Important Questions on Viruses, Viroids and Prions

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Tobacco mosaic virus is a tubular filament of size

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Which one of the following statements about viruses is correct?

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Cauliflower mosaic virus contains:

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Enzymes are absent in

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Influenza virus has –

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Viruses that infect bacteria, multiply and cause their lysis, are called –

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Which of the following statements is not true for retroviruses?

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Tobacco Mosaic Virus (TMV) genes are -

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Genetic material of TMV is:

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The Tobacco mosaic virus (TMV) was crystallized for first time by

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Each capsomere of TMV contain amino acids whose number is

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Leaf extract from an infected plant was passed through a filter with a pore size of 0.05μm diameter. The infectious agent was detected in the filtrate. Which ONE of the following is the likely infectious agent?

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The genome of SARS-CoV2 is composed of

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Creutzfeldt Jakob Disease CJD is a transmissible disease caused by a

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Which one of the following statements is true about viruses?

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Assertion (A): DNA from Bacteriophage head passes through tail core through plasma membrane and enters bacterial cell.

Reason (R): Plasma membrane of the host cell gets dissolved due to lysozyme and releases the new virions.

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In the Bacteriophage the arrangement of its parts (Top to bottom) are as follow:

I. Head containing DNA
II.  Sheath
III. Collar
IV. Tail fibres
V. Base plate

The correct sequence is:

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Match the following lists:

List - I List - II
(A) Question Image (I) Lambda phage
(B) Question Image (II) TMV
(C) Question Image (III) Adenovirus
(D) Question Image (IV) HIV
    (V) Bacteriophage

The correct match is