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Year

BiochemistryEnzymes

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Q2423. Km value is defined as:

A.Substrate concentration at Vmax/2

B.Substrate concentration of twice Vmax

C.Substrate concentration of thrice Vmax

D.Substrate concentration of one third Vmax

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NEET-PG

2012

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BiochemistryEnzymes

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Q2424. The predominant isoenzyme of LDH occuring in liver injury is ?

A.LDH-1

B.LDH-2

C.LDH-4

D.LDH-5

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BiochemistryProtein & Enzyme Metabolism

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Q2425. Specific activity of enzyme is ?

A.limo' of enzyme per gram of substrate

B.Enzyme units per mg of protein

C.Conc. of substrate transformed per minute

D.None

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PharmacologyCardiovascular Drugs

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Q2426. Type of inhibition of aconitase by Transaconitate is?

A.Non-competitive

B.Competitive

C.Allosteric

D.None

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BiochemistryEnzymes & Proteins

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Q2427. Functional plasma enzyme is ?

A.Fibrinogen

B.LDH

C.SGOT

D.SGPT

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BiochemistryCarbohydrate Metabolism

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Q2428. Substrate level phosphorylation is by

A.Pyruvate kinase

B.Phosphofructokinase

C.Hexokinase

D.ATP synthase

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BiochemistryCarbohydrate Metabolism

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Q2429. Substrate level phosphorylation occur in step catalysed by which of the following enzyme in TCA cycle?

A.Isocitrate dehydrogenase

B.Malate dehydrogenase

C.Aconitase

D.Succinate thiokinase

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Forensic MedicineToxicology

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Q2430. In ETC, cyanide inhibits ?

A.Complex I

B.Cytochrome C oxidase

C.Complex IV

D.Complex III

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BiochemistryCarbohydrate Metabolism

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Q2431. NADPH via glycerophosphate shunt makes how many ATP?

A.1

B.2

C.3

D.4

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BiochemistryCarbohydrate Metabolism

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Q2432. Enzyme involved in oxidative phosphorylation ?

A.Pyruvate kinase

B.Succinyl CoA thiokinase

C.NADH dehydrogenase

D.None

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PsychiatryMood Disorders

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Q2433. Among the following, the maximum redox potential is for:

A.NADH/NAD

B.Succinate/Fumarate

C.Ubiquinone

D.Fe+3/ Fe+2

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BiochemistryCarbohydrate Metabolism

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Q2434. In ETC NADH generates -

A.1 ATPs

B.2 ATPs

C.3 ATPs

D.4 ATPs

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BiochemistryCarbohydrate Metabolism

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Q2435. In glycolysis, inorganic phosphate is used reaction, catalyzed by ?

A.Enolase

B.Pyruvate kinase

C.Glyceraldehyde-3-p dehydrogenase

D.Aldolase

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BiochemistryCarbohydrate Metabolism

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Q2436. True about glycolysis?

A.Hexokinase produce ATP

B.1 cycle produces 2 ATP

C.It produces directly 2 molecules of lactate

D.Aldolase produces irreversible polymerization

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BiochemistryCarbohydrate Metabolism

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Q2437. Enzymes of glycolysis are found in:

A.Cytosol

B.Cell membrane

C.Mitochondria

D.Ribososmes

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BiochemistryCarbohydrate Metabolism

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Q2438. The rate limiting step in glycolysis is catalyzed by?

A.Pyruvate kinase

B.Enolase

C.Glucokinase

D.Phosphofructokinase

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BiochemistryCarbohydrate Metabolism

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Q2439. Number of ATP molecules and NADH formed in each cycle of glycolysis ?

A.4 ATP, 2 NADH

B.2 ATP, 2 NADH

C.4 ATP, 4 NADH

D.2 ATP, 4 NADH

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BiochemistryLipid Metabolism

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Q2440. All are activated by insulin except ?

A.Lipoprotein lipase

B.Pyruvate kinase

C.Hormone sensitive lipase

D.Acetyl-CoA carboxylase

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BiochemistryNucleotide Metabolism

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Q2441. Nonsense codons bring about ?

A.Elongation of polypeptide chain

B.Pre-translational modificastion of protein

C.Initiation of protein synthesis

D.Termination of protein synthesis

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BiochemistryCarbohydrate Metabolism

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Q2442. ATP is consumed at which step of glycolysis

A.Enolase

B.Hexokinase

C.Pyruvate kinase

D.Isomerase

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