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CGP EDU Academic Team
Published on: August 20, 2026
Are small naked fragments of RNA that infect plant cells.
Text Solution
Verified by ExpertsThe correct answer is:
D
Viroids are small, circular, single-stranded RNA molecules that are "naked" (meaning they lack a protein capsid or envelope) and exclusively infect plant cells. They are the smallest known infectious pathogens and do not encode any proteins.
Prions are infectious proteins, not RNA.
Prophages are bacteriophage DNA integrated into a host bacterium's genome.
Nucleons refer to particles in an atomic nucleus.
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