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Which of the following statements is incorrect?

  1. A
    Viroids lack a protein coat.
  2. B
    Viruses are obligate parasites.
  3. C
    Infective constituent in viruses is the protein coat.
  4. D
    Prions consist of abnormally folded proteins.

Solution & Step-by-step Explanation

Statement C is incorrect. In viruses, the infective constituent is the genetic material (either DNA or RNA) that enters the host cell. The protein coat (capsid) generally serves as protection and a means of entry but is not the part that directs host cell machinery.

Practice this question

Try it yourself before checking the explanation above.

Which of the following statements is incorrect?
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.

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