Which vitamins participate, in coenzyme form, in reactions of the tricarboxylic acid cycle?
The nucleophile in the first stage of the serine protease mechanism is a) H2O b) the carboxyl of Asp 102 c) the hydroxyl of Ser 195 d) the imidazole of His 57
Arrange the following in their increasing polarity order Carboxylic acid, hydroxyl, phenyl, amino and aldehyde