1.

Read the following statements and select the option which identifies the incorrect ones. (i) Potato spindle tuber disease and Chrysanthermum stunt disease are caused by viroids. (ii) `T_(4)` bacteriophage exhibits lytic cycle. (iii) Retroviruses have two copies of ssRNA. (iv) Interferous which prevent viral multiplication are glycolipid particles.A. ii and iiiB. i and ivC. iii onlyD. iv only

Answer» Correct Answer - D
Interferons are proteins that increase the resistance of cells to attrack by virus.Interferons are produced commercially for therapeutic purposes using genetically engineered bacteria or human tissue culture.


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