試題詳解

27. Signal transduction is the process by which a chemical or physical signal is transmitted through a cell as a series of molecular events. Which of the following statements regarding signal transduction are CORRECT?
(A) Intracellular signals can be triggered by proteins with enzymetic activity such as kinases or phosphatases
(B) Proteins can be phosphorylated at histidine, tyrosine or serine residues
(C) Adaptor proteins usually undergo phosphorylation and provide a docking sites for other signal mediators
(D) Src homology domain 2 (SH2) binds to proline-rich containing proteins
(E) Calcium is a well-known second messenger