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When the viruses are cultivated in the medium containing radioactive Sulphur, then these viruses possess radioactive DNA but not radioactive protein.

When the viruses are cultivated in the medium containing radioactive Sulphur, then these viruses possess radioactive DNA but not radioactive protein. Correct Answer False

DNA doesn’t contain Sulphur whereas protein does. So, when the virus is placed in the culture medium containing radioactive Sulphur, radioactive protein is produced and not the radioactive DNA. This is due to the presence of Sulphur in proteins.

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Statements : About 50 per cent of the animal by-products - hair, skin, horns etc. is edible protein. American chemists have developed a method of isolating 45 per cent of this protein. They used an enzyme developed in Japan to break down soya protein.

Conclusions :
I. Americans have not been able to develop enzymes.
II. Animal by-products protein has the same composition as soya protein.