3

A 42 year old writer had a history of gastrectomy for adenocarcinoma stomach 3 years ago. He complaints of being noticed to be pale by his family. The blood picture shows MCV 105 and Hb 7 g%. The reaction that cannot properly operate is

A. Methionine synthesis from homocysteine
B. Amino levulinic acid synthesis from glycine
C. Adenine synthesis from glycine
D. Isomerization of methyl malonyl CoA to Succinyl CoA
E. Heme synthesis from protoporphyrin

2

Active site of an enzyme is where

A. enzyme covalently attaches to substrate
B. water molecules are recruited
C. substrate distortion occurs preferably
D. electron redistribution takes place
E. weak interactions contribute between substrate and enzyme

1

A 72 year old man came to the emergency department by the complaint of central chest pain for about 2 hours. He was suspected of suffering from acute coronary syndrome. Which of the following cardiac markers would appear first for the diagnosis?

A. LD1
B. Cardiac troponin-I
C. AST
D. Myoglobin
E. CK MB