7551. Enzymes increase reaction rates by______________?
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A. Decreasing the energy of activation

B. Enhancing the forward reaction

C. Altering the free energy of the action

D. Inhibiting the backward reaction

7552. All are true of the genetic code except____________?
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A. Non overlapping

B. Universal

C. Punctuation

D. Degenerate

7553. Iron is present in all, EXCEPT______________?
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A. Pyruvate kinase

B. Myoglobin

C. Catalase

D. Cytochrome

7555. Which of the following is the best site of absorption of calcium ?
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A. Ascending colon

B. Proximal segment of small intestine

C. Middle segment of small intestine

D. Ileum

7556. DNA double helix is bound by_____________?
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A. Covalent bond

B. Vander wall forces

C. Disulfide linkage

D. Hydrogen bond
7558. Thiamine deficiency can be diagnosed by measuring________________?
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A. Alkaline phosphatase levels in blood

B. Plasma pyruvate and lactic acid levels

C. Thiamine levels in blood

D. Transketolase activity in RBC
7560. Albumins and globulins are ________ proteins?
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A. Peptones

B. Prolamines

C. Lactalbumin

D. Simple
7561. Cytochromes are_____________?
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A. Metal containing flavoproteins

B. Iron-porphyrin proteins

C. Pyridine nucleotides

D. Riboflavin containing nucleotides

7563. Which of these is not included in parenteral therapy ?
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A. Carbohydrates

B. Fibres

C. Fats

D. Micronutrients

7564. Biotin is required for the activity of_______________?
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A. Lactate dehydrogenase

B. Phosphohexose isomerase

C. Pyruvate carboxylase

D. Succinate thiokinase

7565. The lipid, which acumulates in fatty liver, is_______________?
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A. Lipoprotein

B. FFA

C. Triglycerides

D. Cholesterol

7566. Glycine is present in____________?
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A. Purines

B. Creatine

C. All of the above

D. Glutathione

E. Hemoglobin

7567. Non essential amino acids are not_____________?
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A. Required in the diet

B. Used by the body

C. Absorbed in the intestines

D. Forming part of the proteins

7569. Within the RBC hypoxia stimulates glycolysis by which of the following regulating pathways ?
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A. Hypoxia inhibits hexokinase

B. Hypoxia stimulates release of all glycolytic enzymes from Band 3 on RBC membrane

C. Activation of the regulatory enzymes by high PH

D. Hypoxia stimulates pyruvate dehydrogenase by increased, 2, 3DPG

7570. Enzyme regulating the conversion of ethanol to acetaldehyde________________?
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A. Acetaldehyde dehydrogenase

B. Catalase

C. Alcohol dehydrogenase

D. Enolase

7571. True about denaturation of protein is all except______________?
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A. Disruption of secondary structure occurs

B. Biological activity is retained

C. Unfolding occurs

D. Sequence of amino acids remain the same

7574. End product of purine metabolism is______________?
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A. Creatinine

B. Xanthine

C. Phosphates

D. Uric acid
7575. Transcription is the synthesis of____________?
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A. Double stranded complimentary copy of DNA

B. Complimentary copy of RNA

C. Single stranded complimentary copy of DNA

D. COmplimentary copy of rRNA

7576. The following is not a carrier protein________________?
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A. Haptoglobulin

B. Cerruloplasmin

C. Transferrin

D. Transcobalamine

7577. HMG CoA reductase is inhibited by_____________?
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A. Clofibrate

B. cholestyramine

C. Gemfibrosil

D. Lovastatin
7578. Which of the following is a derived a derived protein_____________?
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A. Lactalbumin

B. Peptones

C. Prolamines

D. Protamines

7582. Detoxification or protective synthesis occurs by____________?
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A. Oxidation

B. Any of the above

C. Reduction

D. Conjugation

7583. Highest binding of iron in plasma is seen with___________?
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A. Hemoglobin

B. Ceruloplasmin

C. Ferritin

D. Transferrin
7585. The nitrogen of the body is supplied by______________?
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A. Triacyl glycerol

B. Glucose

C. Lipids

D. Proteins
7586. At PH 7 the binding of 2,3 DPG to hemoglobin occurs at which site ?
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A. Sulphydryl group

B. Amino terminal

C. Carboxy terminal

D. Histidine

7588. Ketone bodies are by products of metabolism of_____________?
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A. Fat

B. Protein

C. Carbohydrate

D. All of the above

7589. Which is not seen in HMG CoA pathway ?
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A. Mevalonate

B. Pyruvate

C. Cholesterol

D. Acetyl CoA

7590. The best technique useful for initial viral load estimation is________________?
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A. Electrophoresis

B. Widal test

C. Real time PCR

D. Immunofluoresence

7591. The sigma subunit of prokaryotic RNA polymerase_______________?
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A. Specifically recognizes the promoter site

B. Is inhibited by a-amanitin

C. Binds the antibiotic Rifampicin

D. Is part of the core enzyme

7593. Free radicals are chemical species which have______________?
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A. Single unpaired electron in an outer orbit

B. Double paired electron in an outer orbit

C. Double unpaired electron in an outer orbit

D. Single paired electron in an outer orbit

7594. Restriction endonuclease cleaves______________?
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A. Polypeptide

B. SIngle stranded RNA

C. Double stranded DNA

D. SIngle stranded DNA

7595. Which of the following is correct about breakdown of hemoglobin (Hb)_____________?
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A. Heme?Hb?Biliverdin?Urobilinogen

B. Hb?Heme?bilirubin?Urobilinogen?Biliverdin

C. Hb?Heme?bilirubin?Urobilinogen

D. Hb?Heme?Bilverdin?Uro bilinogen
7596. In Niemann-Picks disease the following substrance accumulate in CNS in excess______________?
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A. Phosphoinositides

B. Glycerophosphatides

C. Phosphosphingosides

D. Glycerosphingosides

7598. Glycemic index of a starchy food is a measure of its________________?
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A. None of the above

B. Collectivity

C. Utility

D. Energy

7600. Fatty acid oxidation occurs in______________?
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A. Microsomes

B. All of the above

C. Mitochondria

D. Cytoplasm