Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
NEET2020BotanyBiological ClassificationActual

Which of the following is correct about viroids?

Options

  1. AThey have free RNA without protein coat
  2. BThey have DNA with protein coat
  3. CThey have free DNA without protein coat
  4. DThey have RNA with protein coat

Correct answer

A. They have free RNA without protein coat

Step-by-step solution

VIROIDS: Viroids are smaller than viruses, self-replicating particles that were discovered by T.O. Diener (1971). Viroids are infectious RNA particles that are devoid of protein coat. The molecular weight of RNA in viroid is low in comparison to viruses. Potato spindle tuber is a viroid causing disease.

Practice Biological Classification on Quantrex Academy →

More from Biological Classification

Match List-I with List-II . List-I List-II A. Spherical I. Vibrio B. Rod II. Cocci C. Comma III. Spirilla D. Spirillum IV. Bacilli Choose the correct answer from the options given 2026Symbiotic association between fungi and algae are called __________. 2026The main criteria used for Five Kingdom Classification proposed by R.H. Whittaker (1969) included : A. Cell structure B. Body organization C. Presence of flagellum D. Reproduction 2026Mad cow disease is caused by __________. 2026Match List-I with List-II . List-I List-II A. Fusion of protoplasms between gametes I. Meiosis B. Fusion of two nuclei II. Plasmogamy C. Generation of haploid spores III. Karyogamy 2026Which of the following is not a prokaryote ? 2026Each of the following characteristics represent a Kingdom proposed by Whittaker. Arrange the following in increasing order of complexity of body organization. A. Multicellular hete 2025Match List I with List II array |l|l|l|l| & List-I & & List-II A. & Rhizopus & I. & Mushroom B. & Ustilago & II. & Smut fungus C. & Puccinia & III. & Bread mould D. & Agaricus & IV 2024 Full Biological Classification list All NEET PYQs