Multiple Choice Quiz on Viruses

This quiz is designed to assess your basic knowledge in ‘viruses’. Questions come under ‘medium’ category. Choose the best answer from the four options given. When you've finished answering as many of the questions as you can, scroll down to the bottom of the page and check your answers by clicking ' Score'.  Percentage score will be displayed along with right answers.

1. Virus possesses
ribosomes to synthesize proteins
organelle for its vital mechanism
either DNA or RNA
none of these
2. What is the genetic material in inflenza virus
double helical DNA
single helix DNA
RNA
none of these
3. Virus are no more 'alive'than as isolated chromosomes because
they require both RNA or DNA
they both need food molecules
they both require oxygen for respiration
both require the environment of the cell to replicate
4. Tobacco mosaic virus (TMV)is a tubular filament of size
300 x 10nm
300 x 20nm
100 x 300nm
30 x 300nm
5. Which one of the following statements about viruses is correct
viruses possess theirown metabolic system
viruses are obligate parasites
nucleic acid of virus is known as capsid
all viruses contain both DNA and RNA
6. Viruses that infects bacteria multiply and cause their lysis, are called
lysozymes
lipolytic
lytic
lysogenic
7. Which one of the following statements is not true for retro viruses
retro viruses carry gene for RNA dependent DNA polymerase
the genetic material in mature retro virus is RNA
retro viruses are causative agents for certain types of cancer in man
DNA is not present at any stage in the life cycle of retro viruses
8. Cauliflower mosaic viruses (CMV) contain
ss RNA
ds RNA
ss DNA
ds DNA
9. Tobacco mosaic virus (TMV) genes are
ss DNA
ss RNA
ds DNA
protienaceous
10. Bacteriophages are
viruses that attacks bacteria
bacteria that attacks viruses
viruses that attacks bacteria and protozoans
none of these
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