NEET 2021 · BiologyVirusesPrevious Year Question
Which of the following statements is incorrect?
Answer: (C) Infective constituent in viruses is the protein coat.. Answer: (C) Infective constituent in viruses is the protein coat.
- A.Viroids lack a protein coat.
- B.Viruses are obligate parasites.
- C.Infective constituent in viruses is the protein coat.✓
- D.Prions consist of abnormally folded proteins.
Correct Answer
(C) Infective constituent in viruses is the protein coat.
Solution & Explanation
Answer: (C) Infective constituent in viruses is the protein coat. Solution: This statement is incorrect. In viruses the genetic material (nucleic acid), not the protein coat, is infectious. Viroids do lack a protein coat, viruses are obligate parasites, and prions consist of abnormally folded protein, so the other statements are correct. NCERT Reference: NCERT Class XI, Biological Classification, p.20, line 17 — "the genetic material is infectious"
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