Description : Selenium is a constituent of (A) Glutathione reductase (B) Glutathione peroxidase (C) Catalase (D) Superoxide dismutase
Last Answer : Answer : B
Description : All of the following are iron-containing enzymes except (A) Carbonic anhydrase (B) Catalase (C) Peroxidase (D) Cytochrome oxidase
Last Answer : Answer : A
Description : Superoxide radicals can be detoxified by (A) Cytochrome c (B) Superoxide dismutase (C) Both (A) and (B) (D) None of these
Last Answer : Answer : C
Description : Hemolytic anemia is caused by the deficiency of certain enzymes of the pentose phosphate pathway, the principal enzyme involved is (A) Glucose-6-phosphate dehydrogenase (B) Aldolase (C) Fructose 1, 6-bisphosphatase (D) Phosphohexose isomerase
Description : The iron containing nonporphyrin is (A) Hemosiderin (B) Catalase (C) Cytochrome C (D) Peroxidase
Description : Copper is associated with _____ mitochondria' enzymes. (1) Cytochrome oxidase (2) Succinic dehydrogenase (3) Catalase (4) Acid phosphatase
Last Answer : (1) Cytochrome oxidase Explanation: Copper is involved in normalized function of many enzymes, such as cytochrome oxidase, which is complex IV in mitochondrial electron ... transportation, antioxidant and free radical scavenging and neutralization, and neurotransmitter synthesis, respectively.
Description : Copper is associated with ____ mitochondrial enzymes. (1) Cytochrome oxidase (2) Succinic dehydrogenase (3) Catalase (4) Acid phosphatase
Last Answer : Cytochrome oxidase
Description : Zinc is a constituent of the enzyme: (A) Succinate dehydrogenase (B) Carbonic anhydrase (C) Mitochondrial superoxide dismutase (D) Aldolase
Description : The cytosolic superoxide dismutase enzyme contains (A) Cu2+ (B) Cu2+ and Zn2+ (C) Zn2+ (D) Mn2+
Description : The enzymes of the pentose phosphate pathway are found in the (A) Cytosol (B) Mitochondria (C) Nucleus (D) Endoplasmic reticulum
Description : The transketolase enzyme in the pentose phosphate pathway requires the B vitamin. (A) Pantothenic acid (B) Thiamin (C) Riboflavin (D) Nicotinic acid
Description : In pentose phosphate pathway, D-ribulose5-phosphate is converted to D-ribose-5- phosphate by the enzyme: (A) Fumarase (B) Ketoisomerase (C) G-6-PD (D) Epimerase
Description : An example of competitive inhibition of an enzyme is the inhibition of a. Succinic dehydrogenase by malonic acid b. Cytochrome oxidase by cyanide c. Hexokinase by glucose-6-phosphate d. Carbonic anhydrase by carbon dioxide
Last Answer : Ans: A
Description : Selenium is a constituent of the enzyme: (A) Glutathione peroxidase (B) Homogentisate oxidase (C) Tyrosine hydroxylase (D) Phenylalanin hydroxylase
Description : Which enzyme is tested for cream pasteurization? a. Plasmin b. Phosphates c. Catalase d. peroxidase
Last Answer : d. peroxidase
Description : Cytosolic superoxide dismutase contains (A) Zn only (B) Cu only (C) Zn and Cu (D) Mn
Description : Mitochondrial superoxide dismutase contains (A) Zinc (B) Copper (C) Magnesium (D) Manganese
Last Answer : Answer : D
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 : An enzyme which uses hydrogen acceptor as substrate is (A) Xanthine oxidase (B) Aldehyde oxidase (C) Catalase (D) Tryptophan oxygenase
Description : The main source of reducing equivalents (NADPH) for lipogenesis is (A) Pentose phosphate pathway (B) Citric acid cycle (C) Glycolysis (D) Glycogenolysis
Description : Pentose phosphate pathway is of significance because it generates (A) NADPH for reductive synthesis (B) Regenerates glucose 6-phosphate (C) Generates fructose 6-phosphate (D) Forms glyceraldehyde 3-phosphate
Description : The hydrogen acceptor used in pentose phosphate pathway is (A) NAD (B) NADP (C) FAD (D) FMN
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 : Which of the following statements are true of oxidants? A. In addition to their pathophysiologic roles in inflammation, injury, and infection, oxidants also have physiologic roles. B. Oxidants may ... involved the catalytic production of superoxide anion (O 2 ) by the enzyme xanthine oxidase.
Last Answer : Answer: ABCD DISCUSSION: Oxidants are reactive oxygen metabolites that have both physiologic and pathophysiologic roles. As potent oxidizing agents, oxidants are involved in cytochrome P ... leukocyte infiltration and activation, causing further tissue damage by the release of cytotoxic proteases
Description : The enzyme using some other substance, not oxygen as hydrogen acceptor is (A) Tyrosinase (B) Succinate dehydrogenase (C) Uricase (D) Cytochrome oxidase
Description : An enzyme catalyzing oxidoreduction, using oxygen as hydrogen acceptor is (A) Cytochrome oxidase (B) Lactate dehydrogenase (C) Malate dehydrogenase (D) Succinate dehydrogenase
Description : Example of an extracellular enzyme is (A) Lactate dehydrogenase (B) Cytochrome oxidase (C) Pancreatic lipase (D) Hexokinase
Description : Albinism is a congenital disorder resulting from the lack of which enzyme? (a) Tyrosinase (b) Xanthine oxidase (c) Catalase (d) Fructokinase
Last Answer : (a) Tyrosinase
Description : ω-oxidation is normally a very minor pathway and is brought by hydroxylase enzymes involving (A) Cytochrome a (B) Cytochrome b (C) Cytochrome c (D) Cytochrome p-450
Description : In glycolysis, ATP is created by A.photophosphorylation B.the chemiosmotic mechanism C.substrate level phosphorylation D.the pentose phosphate pathway
Last Answer : C.substrate level phosphorylation
Description : When acetate is the sole source of carbon for some microorganisms, the cycle which is used, is called A.pentose phosphate pathway B.glycolyic pathway C.glyoxylate pathway D.oxaloacetate pathway
Last Answer : C.glyoxylate pathway
Description : Iron is present in all the following except (A) Peroxidase (B) Xanthine oxidase (C) Aconitase (D) Fumarase
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 : Of the following, which mechanisms are important i the death of erythrocytes (pron: eh-rith-reh-sites) in human blood? Is it a) phagocytosis (pron: fag-eh-seh-toe-sis) b) hemolysis c) mechanical damage d) all of the above
Last Answer : ANSWER: D -- all of the above
Description : Oxaloacetate is converted to aspartic acid by (A) Reductase (B) Oxidase (C) Transminase (D) Catalase
Description : The hexose monophosphate pathway includes the enzyme: (A) Maltase dehydrogenase (B) Hexokinase (C) α-Ketoglutarate dehydrogenase (D) Glucose-6-phosphate dehydrogenase
Description : In glycolytic pathway, iodacetate inhibits the activity of the enzyme: (A) Phosphotriose isomerase (B) Glyceraldehyde-3-phosphate dehydrogenase (C) Pyruvate kinase (D) Phosphofructokinase
Description : The following enzyme is required for the hexose monophosphate shunt pathway: (A) Glucose-6-phosphatase (B) Phosphorylase (C) Aldolase (D) Glucose-6-phosphate dehydrogenase
Last Answer : D
Description : Activity of cytochrome oxidase is inhibited by (A) Sulphite (B) Sulphate (C) Arsenite (D) Cyanide
Description : Cytochrome oxidase contains (A) Cu2+ and Zn2+ (B) Cu2+ and Fe2+ (C) Cu2+ and Mn2+ (D) Cu2+
Description : A copper containing oxidase is (A) Cytochrome oxidase (B) Flavin mononucleotide (C) Flavin adenine dinucleotide (D) Xanthine oxidase
Description : A molybdenum containing oxidase is (A) Cytochrome oxidase (B) Xanthine oxidase (C) Glucose oxidase (D) L-Amino acid oxidase
Description : Which of the following is located in the mitochondria? (A) Cytochrome oxidase (B) Succinate dehydrogenase (C) Dihydrolipoyl dehydrogenase (C) All of these
Description : Pentose production is increased in (A) HMP shunt (B) Uromic acid pathway (C) EM pathway (D) TCA cycle
Last Answer : A
Description : Which of the following property(ies) is/are seen in the members of family Enterobacteriaceae? A.Theyare catalase-positive B.Theyare oxidase-negative C.They ferment glucose D.They reduce nitrates to nitrites
Last Answer : B.Theyare oxidase-negative
Description : In the erythrocytes, the net production of ATP molecules by the Rapport-Leubering pathway is (A) 0 (B) 2 (C) 4 (D) 8
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