Answer: DNA or RNA.
- A DNA or RNA
- B only DNA
- C only RNA
- D a protein
Correct answer: A. DNA or RNA
Explanation: A given virus contains either DNA or RNA (never both) as its genetic material.
Whittaker's five-kingdom system (1969) groups all cellular life by cell structure and nutrition; viruses, viroids, and lichens fall outside this system entirely since they aren't independently classifiable as one of the five.
Concept context
Whittaker's five kingdom system covering Monera, Protista, Fungi, plus viruses, viroids, and lichens. A foundational NEET chapter on how living organisms are grouped.