Question

Organism 'A' does not have a cellular structure but has DNA or RNA as genetic material. Organism 'B' is smaller than the organism 'A' and has free RNA without a protein coat. Both of these organisms A and B do not find a place in the classification system.
Identify the A and B on the basis of the above description.

• A. A - Viruses, B - Viroids
• B. A - Eubacteria, B - Archaebacteria
• C. A - Lichen, B - Fungi
• D. A - Monera, B - Protista

Answer 1

The correct option is A A - Viruses, B - Viroids

Whittaker gave five kingdom classification which includes the kingdom Monera, Protista, Fungi, Plantae and Animalia. He did not mention anything about the viruses, viroids and lichens.
Viruses are acellular and are on the border line of living and non living. They have DNA or RNA as a genetic material bound in a protein coat.
Viroids are even smaller than viruses and and have only RNA as genetic material without a protein coat.