Viruses are parasitic, having DNA/RNA bu...

Viruses are parasitic, having DNA/RNA but they can be crystallized and lack respiration. Thus they are treated as

living materials '

non-living materials

both living and non-living materials

cellulose

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An organism having cytoplasm DNA and RNA but no cell wall is

[A] : Viruses are obligate parasites . [R] : Both DNA and RNA are present in a virus .

Which of the following steps are involved in recombinant DNA technology ? I. The cells having desired DNA molecule are separated and cultured to increase their number. II. A suitable vector and donor DNA both are treated with similar restriction enodnucleases. III. Self ligation is increased with alkaline phosphatase. IV. The host cell cannot be a bacterium.

Name any three viruses which have RNA as the genetic material.

[A] : Viruses lack any kind of enzymatic machinery . [R] : They can respire only inside host cell .

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