Opposable thumbs were an adaptation of primates that enabled them to live in trees
____________________ Indicate whether the statement is true or false.
True
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Which of the following is a difference between Class I and Class II major histocompatibility complex (MHC) proteins?
A) Class I MHC proteins can be found on most cell types, while Class I and II MHC proteins are found on the antigen presenting cells of the immune system B) Class I MHC proteins are added to antigens in the cytoplasm, while Class II proteins are added to antigens in the Golgi apparatus. C) Class I MHC proteins signal the immune system to activate the cell displaying the message, while Class II proteins signal the immune system to destroy a particular cell. D) Class I and Class II MHC proteins have the same basic role, but individuals with particularly strong immune systems will have both types, while most individuals have just one or the other.
Which of the following cytokines acts to stimulate natural killer cells and induce naà¯ve T cells to differentiate to TH1 cells?
A) IL-1? B) IL-6 C) IL-12 D) TNF-?
The human protein TPA has domains that are genetically similar to domains from other proteins,
including epidermal growth factor and fibronectin. This is best explained by ____.
a. alternative splicing b. degeneracy c. exon shuffling d. the wobble hypothesis e. aminoacylation
The patient has vesicles and scabs over her forehead. Microscopic examination of skin scrapings shows gram-positive cocci in clusters. The etiology is
A) Candida. B) Microsporum. C) Pseudomonas aeruginosa. D) Staphylococcus aureus. E) Sarcoptes.