Prions and viroids are smaller and simpler than viruses. Prions are infectious particles that do not seem to contain any nucleic acid. They appear to be misfolded proteins that cause related cellular...

Prions and viroids are smaller and simpler than viruses. Prions are infectious particles that do not seem to contain any nucleic acid. They appear to be misfolded proteins that cause related cellular proteins to also misfold. Prions are the causative agent of TSEs. Viroids are infectious RNAs that are implicated in some plant diseases.

■ If prions are infectious proteins, then what is the form of genetic information that they carry?