<h2>Summary</h2>
<p>Prions are infectious agents that consist of protein, but no <a href="https://app.ulearngo.com/tutorials/introducing-genetics/dna">DNA</a> or RNA, and seem to produce their deadly effects by duplicating their shapes and accumulating in tissues. They are thought to contribute to several progressive <a data-lesson="brain" data-subject="biology" data-tutorial="nervous-system" href="https://app.ulearngo.com/biology/nervous-system/brain">brain</a> disorders, including mad cow disease and Creutzfeldt-Jakob disease. Viroids are single-stranded <a href="https://app.ulearngo.com/tutorials/introducing-genetics/rna">RNA</a> <a data-lesson="innate-immune-system" data-subject="biology" data-tutorial="human-biology" href="https://app.ulearngo.com/biology/human-biology/innate-immune-system">pathogens</a> that infect plants. Their presence can have a severe impact on the agriculture industry.</p>
<h2>Glossary</h2>
<h3>pathogen</h3>
<p>agent with the ability to cause disease</p>
<h3>prion</h3>
<p>infectious particle that consists of <a data-lesson="proteins-2" data-subject="biology" data-tutorial="biology-foundations" href="https://app.ulearngo.com/biology/biology-foundations/proteins-2">proteins</a> that replicate without DNA or RNA</p>
<h3>PrP<sup>c</sup></h3>
<p>normal prion protein</p>
<h3>PrP<sup>sc</sup></h3>
<p>infectious form of a prion protein</p>
<h3>viroid</h3>
<p>plant pathogen that produces only a single, specific RNA</p>

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Summarizing Other Acellular Entities: Prions and Viroids

Biology studies life and living organisms. Biology can be divided into different sections that cover the morphology, physiology, anatomy, behavior, and so on of living organisms.

Biology

Discover the evolution, morphology, and classification of viruses, explore the steps of virus infections and introduction to virus infections and hosts, as well as summarizing prevention and treatment of viral infections, and prions and viroids as other acellular entities.


Summarizing Other Acellular Entities: Prions and Viroids

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