Biology Questions And Answers :: Systematics Viruses Viroids Prions: part11



Basic Science : Systematics Viruses Viroids Prions QUESTIONS AND ANSWERS :: part11 : 16 to 20

Following Basic Science multiple choice objective type questions and answers will help you in many types of 2024 job and other entrance examinations :

16.What is true about viruses?

They can be crystallized and stored for several years
Viruses do not occur as parasites in living cells
They can be cultured on artificial media
They are devoid of genetic material of their own

17.Viroids have

Single stranded RNA not enclosed by protein coat
Single stranded DNA not enclosed by protein coat
Double stranded DNA enclosed by protein coat
Double stranded RNA enclosed by protein coat

18.Which viral disease is spread by mosquito

Plague
Typhus
Yellow fever
Elephantiasis

19.Viruses are no more “alive” than isolated chromosomes because

They require both RNA and DNA
They both need food molecules
They both require oxygen for respiration
Both require the environment of a cell to replicate

20.What is not true of retrovirus

DNA has no role in life cycle
There is a gene for RNA dependent DNA polymerase
Genetic material is RNA
They are causative agents for certain cancers

More Systematics Viruses Viroids Prions QUESTIONS AND ANSWERS available in next pages

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