7451. Megnesium is needed for the activity of which enzymes ?
comments icon0

A. Dismutase

B. ATPase

C. Aldolase

D. Phosphatase

7452. The enzyme involved in the first committed step of glycolysis is____________?
comments icon0

A. Glucose-6-Phosphatase

B. Phosphofructokinase

C. Enolase

D. Hexokinase
7453. Which of the following is not a polymer of glucose?
comments icon0

A. Amylase

B. Glycogen

C. Inulin

D. Cellulose

7454. Rate limiting step in adrenaline synthesis is conversion of____________?
comments icon0

A. Dopamine to nor epinephrine

B. Tyrosine to dopa

C. Phenylalanine to tyrosine

D. Dopa to dopamine

7455. Benzidine test is positive with the enzyme______________?
comments icon0

A. Hydrolase

B. Cytochrome oxidase

C. Dehydrogenase

D. Peroxidase
7457. Glycogen synthesis is increased by_____________?
comments icon0
A. Insulin

B. Epinephrine

C. Cortisone

D. GH

7458. Which of the following is precursor of adrenaline and thyroxine synthesis ?
comments icon0
A. Tyrosine

B. Phenyl alanine

C. None of the above

D. Tryptophan

7459. Coenzyme, in an enzymatic reaction usually functions to_____________?
comments icon0

A. Activate the substrate

B. Accept one of the cleavage products

C. Increase the active sites of apoenzyme

D. Enhance the specificity of apoenzyme

7460. All are true regarding glucose 6 phosphate deficiency except______________?
comments icon0

A. Hyperuricemia

B. Increased mobilization of glycogen from liver

C. Defective cori cycle

D. Hyperglycemia
7461. The deficiency of thiamine can be identified by measuring the red cell______________?
comments icon0

A. Alpha ketoglutarate dehydrogenase

B. Transketaolase

C. Transaldolase

D. Pyruvate dehydrogenase

7463. The immediate precursor of norepinephrine is______________?
comments icon0

A. Tyrosine

B. Phenylalanine

C. Epinephrine

D. Dopamine
7464. The enzyme that splits hydrogen peroxide into water and oxygen is_____________?
comments icon0

A. Cytochrome P 450

B. Cytochromes

C. Super oxide dismutase

D. Catalase
7467. Biotin is required for the activity of_____________?
comments icon0

A. Phosphohexose isomerase

B. Pyruvate carboxylase

C. Succinate thiokinase

D. Lactate dehydrogenase

7468. The main pathways of metabolism in brain are______________?
comments icon0
A. Glycolysis and citric acid cycle

B. Embden-Meyerhof Pathway and H.M.P shunt

C. Glycogenolysis and Gluconeogenesis

D. Glycogenolysis and Citric and cycle

7470. Enzymes involved in degradation of epinephrine_____________?
comments icon0

A. Oxidases

B. Anticholinesterases

C. Cholinesterase

D. Catechol 0-transferase
7471. Calcitonin is antagonist_______________?
comments icon0

A. Thyroxine

B. Parathyroid hormone

C. Serotonin

D. Triidothyronine

7473. Which of the following is NOT a characteristic feature of allosteric enzymes ?
comments icon0

A. Give sigmoid shaped curve

B. Presence of Modulator site

C. Follow Michaelis-Menton Kinetics

D. They are multienzyme complex

7474. NADPH is generated by the action of____________?
comments icon0

A. Glucose 1 phosphate dehydrogenase

B. Glucose 1,6 diphosphate dehydrogenase

C. Glucose 6 phosphate dehydrogenase

D. All of the above

7475. Lactate dehydrogenase is____________?
comments icon0

A. Zymogen

B. Isozyme

C. Coenzyme

D. Antienzyme

7476. Ribosomes are usually associated with______________?
comments icon0

A. Nucleolus

B. Mitochondria

C. Plasma membrane

D. Endoplasmic reticulum
7477. Muscle glycogen cannot contribute directly to blood glucose level because___________?
comments icon0

A. Absence of glucokinase

B. Muscle does not contain glycogen phosphorylase

C. Muscle lacks glucose 6 phosphatase

D. Muscle lacks phospho gluco isomerase

7478. Normal blood PH is______________?
comments icon0

A. 7.7 8.0

B. 7.0 7.12

C. 6.8 7.0

D. 7.38 7.4
7480. The precursor of testosterone is_____________?
comments icon0

A. Methyl testosterone

B. Pregnenolone

C. Estrogen

D. Aldosterone

7481. In glycolysis ATP is produced by the following enzyme______________?
comments icon0

A. Hexokinase

B. Phosphoglycerate kinase

C. Phosphohexose isomerase

D. Enolase

7482. Enzyme + coenzyme constitutes_____________?
comments icon0

A. Protoenzyme

B. Apoenzyme

C. Holoenzyme

D. Proenzyme

7483. Normal blood bilirubin level is______________?
comments icon0
A. 0.5 1 mg%

B. 4 5.5 mg%

C. 1 3 mg%

D. 3 4 mg%

7484. Acetyl Co-A acts as a substrate for all the enzymes except______________?
comments icon0

A. Malonyl CoA synthetase

B. HMG-Co A synthase

C. Fatty acid synthetase

D. Malic enzyme
7485. Which of the following is false about starvation ketoacidosis ?
comments icon0

A. Smell of acetone in breath

B. Metabolic acidosis

C. Rotheras test is +ve

D. Benedicts test +ve
7486. The combination of main supporting enzyme is called______________?
comments icon0

A. Apoenzyme

B. Coenzyme

C. Constitutive enzyme

D. Holoenzyme
7487. Which of the following about biological membrane is true ?
comments icon0
A. Lipid moiety is amphipathic

B. Symmertrical bi leaflet structures

C. Rigid assembly of protein, lipid and carbohydrate

D. Lipid and protein moiety are held by covalent interactions

7488. The first product of glycogenolysis is_____________?
comments icon0

A. Glucose 6 phosphatase

B. Glucose 1,6 diphosphatase

C. Glucose 1- phosphatase

D. Fructose 1- phosphatase

7490. The monsaccharide glucose is best described by which one of the following statements ?
comments icon0

A. It is a ketose

B. It possessesan anomeric C-2 carbon atom

C. It usually exists in the furanose form

D. It formspart of the disaccharide sucrose
7491. Insulin increase the following pathways in liver EXCEPT____________?
comments icon0

A. Protein syntehsis

B. Fatty acid synthesis

C. Glucose synthesis

D. Glycogen synthesis

7493. In Cytochrome p450, P stands for____________?
comments icon0

A. Substrate protiens

B. Pigment

C. Structural proteins

D. Polymer

7496. Elevated levels of serum glutamic oxaloacetic transaminase in indicative of______________?
comments icon0

A. Deficiency of glutamic acid

B. Liver disease

C. Deficiency of oxaloacetic acid

D. All of the above

7497. Bilirubin is produced from________________?
comments icon0

A. Haemoglobin

B. Gall bladder

C. Myoglobin

D. A & B
7498. Which of the following is inclusion of cytoplasm ?
comments icon0

A. Endoplasmic reticulum

B. Golgi body

C. Ribosome

D. Glycogen
7499. The most abundant protein present in body is_____________?
comments icon0

A. Albumin

B. Collagen

C. Globulin

D. Hemoglobin

7500. Which of the following combination is correct ?
comments icon0

A. Thiamine Acyl CoA

B. All of the above

C. Biotin-CO2

D. ATP-Hydrogen