A) algae
B) fungi
C) cyanobacteria
D) viruses
Correct Answer: D
Solution :
[d] Viruses are made up of nucleic acid (DNA or RNA) + protein. Cellular organisation (cell membrane, protoplasm, ribosomes etc.,) is not found. No metabolism occurs in viruses and hence, no enzymes are found (of course, some viruses have a few enzymes which help them penetrate the host). On the other hand, algae, fungi and cyanobacteria have a variety of enzymes.
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