Biochemistry MCQs

Page No. 35

The most common enzyme deficiency in man is___________?


aGlucose 6 phosphate dehydrogenase


bGlucose 6 phosphatase


cHexokinase


dGlucose 1,6 diphosphatase



Coenzyme, in an enzymatic reaction usually functions to_____________?


aActivate the substrate


bIncrease the active sites of apoenzyme


cEnhance the specificity of apoenzyme


dAccept one of the cleavage products



When the prosthetic group of an enzyme is an inorganic ion, it is called a_____________?


aCofactor


bCoenzyme


cApoenzyme


dHoloenzyme


View Answer Cofactor

Megnesium is needed for the activity of which enzymes ?


aPhosphatase


bAldolase


cDismutase


dATPase


View Answer ATPase

The enzyme phosphofructo kinase-1 is strongly activated by_______________?


aCyclic AMP


bAdenosine tri phosphate


cCitrate


dFructose 2,6 bis phosphate



One of the earliest symptoms of Vit. A deficiency is________________?


aNyctalopia


bXerophthalmia


cBitot’s spot


dKeratomalacia


View Answer Nyctalopia

LDH has following number oflsoenzymes________________?


a5


b3


c11


d2


View Answer 5

A example of a preventive antioxidant is_______________?


a Catalase


bTocopherol


cSuperoxide dismutase


dUrate


View Answer Catalase

Which of the following is NOT a characteristic feature of allosteric enzymes ?


aThey are multienzyme complex


bFollow Michaelis-Menton Kinetics


cPresence of Modulator site


dGive sigmoid shaped curve



Multiienzyme complex in human_______________?


aFatty acid synthetase


bMalonyl CoA carboxylase


cCarbomoyl Phosphate synthetase


dAdenosine phospho ribosyl transferase


View Answer Fatty acid synthetase

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