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Unformatted text preview: Where is the carboxyl end found? A. At the exterior of the cell membrane B. Connected with loops 5 and 6 C. At the interior of the cell membrane D. Embedded in the bilayer E. Connected to the extracellular loops 1 and 2 (Ans C) 4. In general, a signal transmitted via phosphorylation of a series of proteins A. Brings a conformational change to each protein B. Requires binding of a hormone to a cytosol receptor C. Cannot occur in yeasts because they lack protein phosphatases D. Requires phosphorylase activity E. Allows target cells to change their shape and therefore their activity (Ans A) 5. Which of the following would be inhibited by a drug that specifically blocks the addition of phosphate groups to proteins? A. G-protein-linked receptor signaling B. Ligand-gated ion channel signaling C. Adenylyl cyclase activity D. Phosphatase activity E. Receptor tyrosine kinase activity (Ans E)...
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- Spring '08
- a. b. c., b. c. d., C. D. E.