True about viroids is?: (A) Cause tumors in animals, (B) Lack envelope like covering, (C) Have only genetic material, (D) Visible on light microscope
Answer is B. Viroids is a subviral agent that does not have an extracellular dormant ( virion) phase and has a genome that is much smaller than those of known viruses. REF:ANATHANARAYAN AND PANIKER'S TEXTBOOK OF MICROBIOLOGY 8TH EDITION PAGE NO:443