問題詳情
74. Which of the followings is NOT true of G protein-coupled receptors (GPCRs)?
(A) GPCRs are cell-surface transmembrane receptors that work with the help of monomer G proteins.
(B) GPCRs have similar structure in which a single polypeptide has seven transmembrane helices.
(C) Epinephrine can target the same type of GPCR in liver cell and skeletal muscle blood vessel.
(D) G protein systems are involved in cholera and pertussis diseases.
(E) G protein functions as a molecular switch that is either on or off depending on GTP or GDP is attached.
(A) GPCRs are cell-surface transmembrane receptors that work with the help of monomer G proteins.
(B) GPCRs have similar structure in which a single polypeptide has seven transmembrane helices.
(C) Epinephrine can target the same type of GPCR in liver cell and skeletal muscle blood vessel.
(D) G protein systems are involved in cholera and pertussis diseases.
(E) G protein functions as a molecular switch that is either on or off depending on GTP or GDP is attached.
參考答案
答案：A
難度：困難0.333333
統計：A(3),B(0),C(4),D(0),E(0)
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