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BiochemistryEnzymes

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Q7881. Which of the following is known as suicidal enzyme?

A.Lipoxygenase

B.Cyclooxygenase

C.Thromboxane synthatase

D.5' nucleotidase

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NEET-PG

2015

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BiochemistryNucleotide Metabolism

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Q7882. Rate limiting enzyme in bile acid synthesis ?

A.Desmolase

B.21 α-hydroxylase

C.7α-hydroxylase

D.12α-hydroxylase

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NEET-PG2015Repeats: N/A

BiochemistryProtein & Enzyme Metabolism

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Q7883. Enzyme activity is expressed as:

A.Millimoles /lit?

B.Milli gm/lit?

C.Mg/ dl

D.Micromoles/min

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BiochemistryEnzymes

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Q7884. Example of allosteric inhibition

A.Inactivation of glycogen synthase by phosphorylation

B.Decreased synthesis of glucokinase by glucagon

C.Inhibition of PFK-1 by citrate

D.All of the above

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NEET-PG2015Repeats: N/A

BiochemistryVitamins & Minerals

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Q7885. Lysyl oxidase requires which cofactor -

A.Zn

B.Cu

C.Se

D.Fe

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NEET-PG2015Repeats: N/A

RadiologyGeneral Radiology

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Q7886. Mechanism of conversion of trypsinogen to trypsin -

A.Hydrolysis

B.Phosphorylation

C.Removal of part of protein

D.Removal of Carboxyl group

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ENTEar

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Q7887. Immediate source of energy is ?

A.Cori's cycle

B.HMP

C.ATP

D.TCA cycle

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NEET-PG2015Repeats: N/A

PharmacologyGeneral Pharmacology

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Q7888. The mechanism of action of uncouplers of oxidative phosphorylation involves:

A.Inhibition of ATP synthase

B.Stimulation of ATP synthase

C.Disruption of proton gradient across the inner membrane

D.Disruption of proton gradient across outer membrane

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BiochemistryCarbohydrate Metabolism

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Q7889. True about NADP -

A.Acts as coenzyme form of Niacin

B.Involved in HMP shunt

C.Not involved in glycolysis

D.All are true

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BiochemistryCarbohydrate Metabolism

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Q7890. In malate shuttle, NADH Produces how many ATPs

A.1

B.1-5

C.2

D.2.5

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BiochemistryCarbohydrate Metabolism

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Q7891. Not a substrate for gluconeogenesis -

A.Glycerol

B.Leucine

C.Lactate

D.Propionate

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BiochemistryVitamins & Minerals

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Q7892. Pyruvate dehydrogenase requires all cofactors except

A.Thiamin

B.Riboflavin

C.Niacin

D.Pyridoxin

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BiochemistryCarbohydrate Metabolism

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Q7893. Lactate produced anaerobically is used by

A.Gluconeogenesis & Glycolysis

B.Cori cycle & gluconeogenesis

C.TCA cycle & Glycogenolysis

D.Cori cycle only

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BiochemistryCarbohydrate Metabolism

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Q7894. Citrate synthase is inhibited by -

A.ATP

B.ADP

C.Insulin

D.Glucagon

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BiochemistryCarbohydrate Metabolism

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Q7895. Fumarate is formed from which amino acid

A.Methionine

B.Valine

C.Histidine

D.Tyrosine

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BiochemistryCarbohydrate Metabolism

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Q7896. The major role of 2, 3 bisphosphoglycerate in RBCs is -

A.Acid-base balance

B.Reversal of glycolysis

C.Release of oxygen

D.Binding of oxygen

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NEET-PG2015Repeats: N/A

BiochemistryEnzymes & Proteins

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Q7897. Enzyme deficient in Hers disease -

A.Muscle phosphorylase

B.Liver phosphorylase

C.Acid maltase

D.Debranching enzyme

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BiochemistryCarbohydrate Metabolism

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Q7898. Immediate metabolic products during conversion of Fructus 1-6 bisphosphate to 2 molecules of pyruvate -

A.Glyceraldehyde-3-phosphate and 1,3-bisphosphoglycerate

B.Dihydroxyacetone phosphate and 1,3 bisphosphoglycerate

C.Glyceraldehyde-3-phosphate and dihydroxy-acetone phosphate

D.3-phosphoglycerate and 1,3 bisphosglycerate

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BiochemistryCarbohydrate Metabolism

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Q7899. In conversion of glucose to glucose-6- phosphate in glycolysis true is

A.Glucokinase has low km

B.Hexokinase is found only in liver

C.Glucokinase is induced by insulin

D.Hexokinase is not specific for glucose

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SurgeryGeneral Surgery

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Q7900. Major carbohydrate store in the body -

A.Blood glucose

B.Glycogen in adipose tissue

C.Hepatic glycogen

D.None of the above

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