Describe the mechanism by which PrP is infectious
What will be an ideal response?
The clue to why PrP acts as an infectious agent was found when it was discovered that all mammals contain the gene for PrP. However, under normal conditions, the protein produced from this gene, cellular PrP, is not a pathogenic agent. It is when PrP folds into an abnormal form called prion PrP that it is infectious. As prion PrP, the protein is capable of inducing copies of cellular PrP to refold into prion PrP, thereby causing the disease form of the protein to accumulate. Because the genetic information to create this protein is found in the host organism, prions are the only known example of a totally protein-based infectious agent.
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A) anaerobic culture. B) anoxygenic culture. C) nutritionally deficient culture. D) pure culture.
Explain how an herbivore, carnivore, omnivore and detritivore are similar
What will be an ideal response?
What is the underlying molecular cause of Crohn’s disease?
a. B cells are mutated and do not release antibodies. b. Receptor proteins are mutated and cause an abnormal immune response. c. Helper T cells are inactivated. d. Mucus is not released from epithelial tissues. e. Antigen-presenting cells are absent.