Prions are

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Multiple Choice

Prions are

Explanation:
Prions are infectious proteins that cause neurodegenerative diseases by inducing misfolding of normal prion proteins in brain tissue. They lack nucleic acids, so they are not bacteria, fungi, or viruses. This protein-only infectious mechanism explains their transmission and resistance to typical sterilization. Examples include Creutzfeldt-Jakob disease in humans and bovine spongiform encephalopathy in cattle. The other options misclassify prions as cellular organisms or as viruses, which prions are not.

Prions are infectious proteins that cause neurodegenerative diseases by inducing misfolding of normal prion proteins in brain tissue. They lack nucleic acids, so they are not bacteria, fungi, or viruses. This protein-only infectious mechanism explains their transmission and resistance to typical sterilization. Examples include Creutzfeldt-Jakob disease in humans and bovine spongiform encephalopathy in cattle. The other options misclassify prions as cellular organisms or as viruses, which prions are not.

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