G蛋白偶联受体信号传递途径中刺激型途径和抑制型途径的共同点是()。
A.都有同样的受体
B.作用的效应蛋白都是腺苷酸环化酶
C.都能激活腺苷酸环化酶
D.都能抑制腺苷酸环化酶
E.都能激活磷脂酰肌醇特异的磷酯酶C
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在酶联受体完成信号转导过程中,充当第二信使的是()。
A.PTK
B.cAMP
C.cGMP
D.IP3
E.磷酸化的靶蛋白
下列哪种受体属于G蛋白偶联受体?()
A.胰岛素受体
B.生长因子受体
C.N-乙酰胆碱受体
D.α-肾上腺素受体
E.神经生长因子受体
受体与配体结合的特点包括()。
A.高度专一性
B.高度亲和力
C.可饱和性
D.可逆性
E.可通过磷酸化和去磷酸化进行调节
选词填空,必要时改变形式:challengeinspirevaluecontactdesperatecheerfuluncaringbattle1. One of the most ________ aspects of coping with illness is the unpredictable nature of many conditions and the uncertainty.2. As she repeated the same message over and over, she could hear the growing _______ in her voice, but she could do nothing to control it.3. People are more alert, focused, and even ______ after chewing gum, according to a study from Cardiff University in Wales.4. Now, too frequently, style and technique seem to be _______ over powerful story telling in TV production.5. The website allows people to _______ me directly about my editing and mentoring services.6. It is so ______ that so many people feel moved to come out and express themselves.