Which of the following is NOT true concerning prions?

Question

BlackTom AI · Accepted Answer

Examining the statements about prions requires distinguishing what prions are and are not in terms of structure and biology.
Option 1: 'Has protein present' — This is true because prions are misfolded proteins; they are composed solely of protein and do not rely on nucleic acids for their identity.
Option 2: 'Contains genetic material' — This is not true. Prions lack nucleic acids (DNA or RNA); they propagate by templating normal prion proteins, not by carrying genetic material, so this claim is incorrect.
Option 3: 'Does not carry out its own metabolic reactions' — This is true. Prions do not have the machinery to perform metabolism; they are simply misfolded protein conformations that interact with normal proteins.
Option 4: 'Has no plasma membrane present' — This is true. Prions are not cells and therefore do not possess a plasma membrane.
Option 5: 'Is not considered cellular' — This is true. Prions are proteins, not cells, so they are not classified as cellular entities.
In summary, the only statement that conflicts with the fundamental nature of prions is Option 2, which asserts the presence of genetic material; prions lack nucleic acids, making this claim incorrect while the others align with established characteristics.

Which of the following is NOT true concerning prions?单项选择题

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