Description : The pentose phosphate pathway protects erythrocytes against hemolysis by assisting the enzyme: (A) Superoxide dismutase (B) Catalase (C) Glutathionic peroxidase (D) Cytochrome oxidase ENZYMES 149
Last Answer : Answer : C
Description : Selenium is a constituent of the enzyme: (A) Glutathione peroxidase (B) Homogentisate oxidase (C) Tyrosine hydroxylase (D) Phenylalanin hydroxylase
Last Answer : Answer : A
Description : Zinc is a constituent of the enzyme: (A) Succinate dehydrogenase (B) Carbonic anhydrase (C) Mitochondrial superoxide dismutase (D) Aldolase
Last Answer : Answer : B
Description : Cytosolic superoxide dismutase contains (A) Zn only (B) Cu only (C) Zn and Cu (D) Mn
Description : Superoxide radicals can be detoxified by (A) Cytochrome c (B) Superoxide dismutase (C) Both (A) and (B) (D) None of these
Description : Mitochondrial superoxide dismutase contains (A) Zinc (B) Copper (C) Magnesium (D) Manganese
Last Answer : Answer : D
Description : The cytosolic superoxide dismutase enzyme contains (A) Cu2+ (B) Cu2+ and Zn2+ (C) Zn2+ (D) Mn2+
Description : Cytosolic superoxide dismutase contains (A) Cu2+ and Zn2+ (B) Mn2+ (C) Mn2+ and Zn2+ (D) Cu2+ and Fe2+
Description : The mitochondrial superoxide dismutase contains (A) Mg++ (B) Mn++ (C) Co++ (D) Zn++
Description : Hydrogen peroxide may be detoxified in the absence of an oxygen acceptor by (A) Peroxidase (B) Catalase (C) Both (A) and (B) (D) None of these
Description : The iron containing nonporphyrin is (A) Hemosiderin (B) Catalase (C) Cytochrome C (D) Peroxidase
Description : All of the following are iron-containing enzymes except (A) Carbonic anhydrase (B) Catalase (C) Peroxidase (D) Cytochrome oxidase
Description : Which enzyme is tested for cream pasteurization? a. Plasmin b. Phosphates c. Catalase d. peroxidase
Last Answer : d. peroxidase
Description : Oxaloacetate is converted to aspartic acid by (A) Reductase (B) Oxidase (C) Transminase (D) Catalase
Description : The following are the functions of copper: (A) Constituent of cytochromes (B) Catalase (C) Tyrosinase (D) All of these
Description : Glutathione is a constituent of (A) Leukotriene A4 (B) Thromboxane A1 (C) Leukotriene C4 (D) None of these
Description : Metallic constituent of “Glucose tolerance factor” is (A) Sulphur (B) Cobalt (C) Chromium (D) Selenium
Description : Iron is present in all the following except (A) Peroxidase (B) Xanthine oxidase (C) Aconitase (D) Fumarase
Description : Iron-pophyrin is present as prosthetic group in (A) Cytochromes (B) Catalases (C) Peroxidase (D) None of these
Description : Formation of melanin from tyrosine requires the action of (A) Dopa decarboxylation (B) Diamine oxidase (C) Peroxidase (D) Tyrosinase
Description : Superoxide radicals can be detoxified by (A) Cytochrome c (B) Cytochrome b (C) Cytochrome a (D) None of these
Description : Vitamin E protects the polyunsaturated fatty acids from oxidation by molecular oxygen in the formation of (A) Superoxide (B) Peroxide (C) Trioxide (D) All of these
Description : The enzymes present in the membrane of mitochondria are (A) Flavoproteins and cytochromes (B) Fumarase and lipase (C) Enolase and catalase (D) Hexokinase and zymase
Description : The following reaction is characteristic of what type of enzymes? 2H2O2 → 2H2O + O2 (A) Peroxides (B) Catalase (C) Dehydrogenase (D) Copper containing oxidases
Description : An enzyme which uses hydrogen acceptor as substrate is (A) Xanthine oxidase (B) Aldehyde oxidase (C) Catalase (D) Tryptophan oxygenase
Description : The α-ketoacid is decarboxylated by H2O2 forming a carboxylic acid with one carbon atom less in the absence of the enzyme: (A) Catalase (B) Decarboxylase (C) Deaminase (D) Phosphatase
Description : The example of chromoprotein: (A) Salmine (B) Catalase (C) Zein (D) Gliadin
Description : Iodine is required in human body for (A) Formation of thyroxine (B) Formation of Glutathione (C) Formation of potassium iodide (D) Adrenalin
Description : Methemoglobin can be reduced to haemoglobin by (A) Removal of hydrogen (B) Vitamin C (C) Glutathione (D) Creatinine
Description : Removal of BSP dye by the liver involves conjugation with (A) Thiosulphate (B) Glutamine (C) Cystein component of glutathione (D) UDP glucuronate
Description : Glutathione is a (A) Dipeptide (B) Tripeptide (C) Polypeptide (D) None of these
Description : In glutathione (a tripeptide) is present apart from Glutamic acid and cysteine: (A) Serine (B) Glycine (C) Leucine (D) Phenyl alanine
Description : Sulphur-containing amino acid is (A) Glutathione (B) Chondroitin sulphate (C) Homocysteine (D) Tryptophan
Description : A tripeptide functioning as an important reducing agent in the tissues is (A) Bradykinin (B) Kallidin (C) Tyrocidin (D) Glutathione
Description : A peptide which acts as potent smooth muscle hypotensive agent is (A) Glutathione (B) Bradykinin (C) Tryocidine (D) Gramicidin-s
Description : Which of the following is a tripeptide? (A) Anserine (B) Oxytocin (C) Glutathione (D) Kallidin
Description : Which of the following is a dipeptide? (A) Anserine (B) Glutathione (C) Glucagon (D) β -Lipoprotein
Description : Reduced glutathione functions in R.B.Cs to (A) Produce NADPH (B) Reduce methemoglobin to hemoglobin (C) Produce NADH (D) Reduce oxidizing agents such as H2O2
Last Answer : D
Description : Dehydrogenation of succinic acid to fumaric acid requires the following hydrogen carrier: (A) NAD+ (B) NADP+ (C) flavoprotein (D) Glutathione
Last Answer : C
Description : Glutathione is made up of which amino acids?
Last Answer : Glutamic acid, cysteine and glycine.
Description : The cell walls of many gram positive bacteria can be easily destroyed by the enzyme known as A-lipase B- .lysozyme C- .pectinase D-.peroxidase
Last Answer : .lysozyme
Description : Which of the following liquids is not suitable for prolonged immersion of cobalt chrome partial dentures: A. Alkaline peroxidase B. Hypochlorite solutions C. Soap solutions D. Water
Last Answer : B. Hypochlorite solutions
Description : Cancer cells may become resistant to amethopterin by (A) Developing mechanisms to destroy amethopterin (B) Amplification of dihydrofolate reducatse gene (C) Mutation in the dihydrofolate reductase ... is no longer inhibited by amethopterin (D) Developing alternate pathway of thymidylate synthesis
Description : Amplification of dihydrofolate reductase gene in a cancer cell makes the cell (A) Susceptible to folic acid deficiency (B) Less malignant (C) Resistant to amethopterin therapy (D) Responsive to amethopterin therapy
Description : Amplification of dihydrofolate reductase gene may be brought about by (A) High concentrations of folic acid (B) Deficiency of folic acid (C) Low concentration of thymidylate (D) Amethopterin
Description : All of the following statements about thioredoxin reductase are true except: (A) It requires NADH as a coenzyme (B) Its substrates are ADP, GDP, CDP and UDP (C) It is activated by ATP (D) It is inhibited by dADP
Description : Conversion of uridine diphosphate into deoxyuridine diphosphate requires all the following except (A) Ribonucleotide reductase (B) Thioredoxin (C) Tetrahydrobiopterin (D) NADPH
Description : Methotrexate blocks the synthesis of thymidine monophosphate by inhibiting the activity of the enzyme: (A) Dihydrofolate reductase (B) Orotate phosphoribosyl transferase (C) Ribonucleotide reductase (D) Dihydroorotase
Description : Conversion of deoxyuridine monophosphate to thymidine monophosphate is catalysed by the enzyme: (A) Ribonucleotide reductase (B) Thymidylate synthetase (C) CTP synthetase (D) Orotidylic acid decarboxylase
Description : Ceruloplasmin shows the activity (A) As ferroxidase (B) As reductase (C) As ligase (D) As transferase