Biological Classification Question 118

118. Viruses have:

(a) DNA enclosed in a protein coat

(b) Prokaryotic nucleus

(c) Single chromosome

(d) Both DNA and RNA

Show Answer

Answer : a

Hints & Solutions

(a) All viruses are nucleoproteins (Nucleic acid + Protein) in the structure. The nucleic acid (DNA and RNA) is the genetic material. In a particular virus either DNA or RNA is the genetic material. Both are never present in a virus. Single stranded RNA or sS RNA - Tobacco mosaic virus (TMV) Virus envelope is known as capsid. The capsid is composed of protein subunits called capsomere.



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