Which of the followings is Ser/Thr kinase? A: Protein kinase A B: MAPK C: Protein kinase C D: Protein kinase G E: MEK

Which of the following signaling molecules could be directly activated by Ca ion binding? A: cAMP B: Calmodulin C: Protein kinase A D: Protein kinase B E: Protein kinase G

protein kinase C system，PKC system (PKC系统)

Which one of the following enzymatic reactions is reversible? ( ) A: The reaction catalyzed by glycogen phosphorylase B: The reaction catalyzed by phosphoglycerate kinase C: The reaction catalyzed by pyruvate kinase D: The reaction catalyzed by fructose bisphosphatase-1 E: The reaction catalyzed by hexokinase

中国大学MOOC: In the NF-kB signaling pathway, which of the following molecules is downstream of I-kB kinase?

In the NF-kB signaling pathway, which of the following molecules is downstream of I-kB kinase? A: NF-kB B: TNF-a C: TAK1 D: Notch

In the NF-kB signaling pathway, which of the following molecules is downstream of I-kB kinase?‏‏‏‏‏​‏ A: NF-kB B: TNF-a C: TAK1 D: Notch

Protein kinase A itself is different in different cell types， which explains why the effects of cyclic AMP vary depending on the target cell. （ ）

蛋白激酶A(Protein Kinase A,PKA)由两个催化亚基和两个调节亚基组成,cAMP能够与酶的哪一部分结合?( ) A: 催化亚基 B: 调节亚基

CdK(Cyclin-dependent Kinase)是否具有酶活性依赖于 A: 与cyclin的结合 B: Cdk本身的磷酸化 C: B都必需 D: B还不够