Prions are infectious agents which are responsible for neurodegenerative diseases in animals. Prions cause the refolding of the alpha helical and coil forms of protein structure into beta sheets.
Explanation:
The alpha sheets and coil structures assume <u>helical structures</u> and therefore would give different physiological properties to protein. When they are converted into beta sheets, which are <em>flat and parallel</em>, the structure and function of the protein get altered.
The cellular form of the protein is sensitive to proteases whereas the misfolded protein is <em>not affected</em> by proteases. The misfolded form perpetuates itself by causing the newly synthesized normal form of protein to become <u>degenerate</u>.
<em>Kuru</em> was the first disease caused by prion in humans.,
Answer: A possible reason for these haircolors is that you could get a mix of your 2 parents haircolors. Another possible reason is that people just simply tinted their hair.
Due to the fact that if some species die off, the other species that rely on those species for food or protection would loose that food/ protection which may lead to their extinction and their extinction would lead to another extinction and so on.