Biochemistry MCQs

Page No. 35

The most common enzyme deficiency in man is___________?


aGlucose 6 phosphate dehydrogenase

✓


bGlucose 6 phosphatase

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cHexokinase

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dGlucose 1,6 diphosphatase

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Coenzyme, in an enzymatic reaction usually functions to_____________?


aActivate the substrate

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bIncrease the active sites of apoenzyme

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cEnhance the specificity of apoenzyme

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dAccept one of the cleavage products

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


aCofactor

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bCoenzyme

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cApoenzyme

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dHoloenzyme

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View Answer Cofactor

Megnesium is needed for the activity of which enzymes ?


aPhosphatase

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bAldolase

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cDismutase

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dATPase

✓


View Answer ATPase

The enzyme phosphofructo kinase-1 is strongly activated by_______________?


aCyclic AMP

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bAdenosine tri phosphate

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cCitrate

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dFructose 2,6 bis phosphate

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


aNyctalopia

✓


bXerophthalmia

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cBitot’s spot

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dKeratomalacia

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View Answer Nyctalopia

LDH has following number oflsoenzymes________________?


a5

✓


b3

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c11

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d2

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View Answer 5

A example of a preventive antioxidant is_______________?


a Catalase

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bTocopherol

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cSuperoxide dismutase

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dUrate

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View Answer Catalase

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


aThey are multienzyme complex

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bFollow Michaelis-Menton Kinetics

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cPresence of Modulator site

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dGive sigmoid shaped curve

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Multiienzyme complex in human_______________?


aFatty acid synthetase

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bMalonyl CoA carboxylase

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cCarbomoyl Phosphate synthetase

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dAdenosine phospho ribosyl transferase

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View Answer Fatty acid synthetase

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