Some scientists are trying to develop a vaccine that would prevent cancer. What is an important consideration?
A. The natural killer (NK) cells already perform this function, which cannot be enhanced.
B. Since cancer cells have self-marking MHC molecules, they cannot be attacked by the immune system.
C. It is not possible-vaccines can only protect against viruses or bacteria.
D. Antigen selection would be critical, due to danger of the body's immune system attacking its own healthy tissue.
Answer: D
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All of the following statements about cellular trafficking are true except
A) COPII-coated vesicles move materials from ER to Golgi. B) COPI-coated vesicles move materials from Golgi to the secretory vesicle. C) movement may be mediated by microtubules. D) v-SNAREs occur in vesicles; t-SNAREs occur on target sites. E) tethering proteins mediate docking between target and vesicle.
During the __________, a person recovers from a disease and the body returns to its pre-disease state.
Fill in the blank(s) with the appropriate word(s).
Assume each of the following letters represents an amino acid. What type of gene mutation occurred to produce the following protein sequence?Normal: JAYBIRDCATPAWMutated: JAYBIRDBATPAW
A. nonsense B. sense C. missense D. frameshift E. silent
Pyruvate is produced during: