二、簡答題(10分)
1. With the help of a diagram, please describe how mitogen-activated protein kinase is activated.

3.貨幣幻覺

2.衝擊落後

45. Which one of following ions could be transported by valinomycin?
(A) Na⁺
(B) K⁺
(C) Ca⁺⁺
(D)Mg⁺⁺

44. Which one of the followings could be synthesized by the skin after exposure to sunlight?
(A) Vit D2
(B) Vit D3
(C) Vit C
(D)1a, 25-dihydroxycholecalciferol

43. How many Ca²⁺ ion binding sites could be found in calmodulin?
(A) 1
(B) 2
(C) 3
(D) 4