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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