Biochemistry MCQs

Page No. 34

Acetyl Co-A acts as a substrate for all the enzymes except______________?


aHMG-Co A synthase


bMalic enzyme


cMalonyl CoA synthetase


dFatty acid synthetase


View Answer Malic enzyme

Km of an enzyme is_____________?


aDissociation constant


bThe normal physiological substrate concentration


cSubstrate concentration at half maximal velocity


dNumerically identical for all isozymes that catalyses a given reaction



A material that speeds up a chemical reaction without chemically becoming involved is called_____________?


aA solvent


bA base


cA catalyst


dThermoplastic


View Answer A catalyst

Fraction of CPK is an enzyme that is elevated in a myocardial infarct is____________________?


aMM fraction


bMB fraction


cBB fraction


dBoth MM and BB fraction


View Answer MB fraction

Enzymes are classified according to_________________?


aAction on substrate


bAction of coenzymes


cNature of the enzymes


dAll of the above


View Answer Action on substrate

The activity of this plasma enzyme is responsible virtually for all plasma cholesterol esters in humans_______________?


a Lecithin cholesterol acyl transferase (LCAT)


bPyrophospho mevalonate decarboxylase


cHMG CoA reductase


dPhospho mevalonate kinase



Enzyme that catalyses the transfer of a molecule group from one molecule to another is_____________?


a Oxidases


bPeptidases


cTransferases


dLIpases


View Answer Transferases

The enzyme that splits hydrogen peroxide into water and oxygen is_____________?


aCytochromes


bCytochrome P 450


cSuper oxide dismutase


dCatalase


View Answer Catalase

Serum alkaline phosphatase level increase in_______________?


aHypothyroidism


bCarcinoma of prostate


cHyperparathyroidism


dMyocardial infarction


View Answer Hyperparathyroidism

Enzymes concerned with the citric acid cycle are found in______________?


aNucleus


bMitochondria


cRibosomes


dNon-particulate cytoplasm


View Answer Mitochondria

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