Description : Some proteolytic enzymes are (C.P.M.T. 77) (a) Trypsin, peptidase, pepsin (b) Amylopsin, steapsin, ptyalin (c) Amylase, lipase, zymase (d) Urease, zymase, dehydrogenase
Last Answer : (a) Trypsin, peptidase, pepsin
Description : Which one of the following is not – enzymes (a) Maltase (b) Sucrase (c) Amylase (d) Urease
Last Answer : (a) Maltase
Description : Zymogen cells of gastric gland secrete (a) Pepsinogen (b) Chymotrypsin (c) Pepsin (d) Trypsin
Last Answer : (a) Pepsinogen
Description : Zymogen cell and chief cells secrete (a) HCI (b) Mucus (c) Pepsi (d) Trypsin
Last Answer : (c) Pepsi
Description : Zymogen cells are also called (a) Mast cells (b) Oxyntic cells (c) Chief cells (d) None of these
Last Answer : (c) Chief cells
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 : Synthesis of prostaglandinsis is inhibited by (A) Aspirin (B) Arsenic (C) Fluoride (D) Cyanide
Last Answer : (A) Aspirin
Description : Which of the following is located in the mitochondria? (A) Cytochrome oxidase (B) Succinate dehydrogenase (C) Dihydrolipoyl dehydrogenase (D) All of these
Last Answer : (D) All of these
Description : Cyanide poisoning causes death in seconds because - (1) It denatures enzymes of the heart/muscle (2) It breaks the electron transport chain (3) It causes Lysis of red blood cells (4) It causes cardiac arrest
Last Answer : (4) It causes cardiac arrest Explanation: Cyanide poisoning occurs on exposure to a com-pound that produces cyanide ions when dissolved in water. The cyanide ion halts cellular respiration by inhibiting ... coma with seizures, apnea, and cardiac arrest, with death following in a matter of seconds.
Description : Cyanide poisoning causes death in seconds because (1) It denatures enzymes of the heart/muscle (2) It breaks the electron transport chain (3) It causes Lysis of red blood cells. (4) It causes cardiac arrest
Last Answer : It causes cardiac arrest
Description : Activity of cytochrome oxidase is inhibited by (A) Sulphite (B) Sulphate (C) Arsenite (D) Cyanide
Last Answer : Answer : D
Description : An example of feedback inhibition is (A) Allosteric inhibition of hexokinase by glucose6-phosphate (B) Cyanide action on cytochrome (C) Sulpha drug on folic acid synthesizer bacteria (D) Reaction between succinic dehydrogenase and succinic acid
Last Answer : Answer : A
Description : An enzyme common to de novo synthesis of pyrimidine nucleotides and urea is (A) Urease (B) Carbamoyl phosphate synthetase (C) Aspartate transcarbamoylase (D) Argininosuccinase
Last Answer : Answer : B
Description : In humans purine are catabolised to uric acid due to lack of the enzyme: (A) Urease (B) Uricase (C) Xanthine oxidase (D) Guanase
Description : The first enzyme isolated, purified and crystallied from Jack bean (Canavalia) by summer in 1926 was (A) Urease (B) Insulin (C) Ribonuclease (D) Zymase
Description : Urea is produced physiologically by the action of the enzyme: (A) Urease (B) Glutaminase (C) Arginase (D) None of these
Last Answer : Answer : C
Description : J. B. Sumner isolated first enzyme from Jackbeans as- (1) amylase (2) trypsin (3) urease (4) renin
Last Answer : (3) urease Explanation: James Batcheller Sumner (November 19, 1887 – August 12, 1955) was an American chemist. He discovered that enzymes can be crystallized.
Description : In plants, enzyme responsible for the synthesis of the malic acid is : (A) Rubisco (B) PEP carboxylase (C)Kinase (D) Urease
Last Answer : (A) Rubisco
Description : A drug which prevents uric acid synthesis by inhibiting the enzyme xanthine oxidase is (A) Aspirin (B) Allopurinol (C) Colchicine (D) Probenecid
Last Answer : (B) Allopurinol
Description : Arginase enzyme is formed by (a) Spleen (b) Liver (c) Kidney (d) All
Last Answer : (b) Liver
Description : What is common among amylase, rennin and trypsin (a) All are protein (b) These are all proteolytic enzyme (c) These are produced in stomach (d) These act at a pH lower than 7
Last Answer : (a) All are protein
Description : The enzyme which is used for the digestion of fat is (a) Water (b) Bile (c) Amylase (d) Lipase
Last Answer : (d) Lipase
Description : Which of the following regions of the alimentary canal of rabbit does not secrete a digestive enzyme ? (a) Mouth (b) Oesophagus (c) Stomach (d) Duodenum
Last Answer : (b) Oesophagus
Description : Which one is not enzyme (a) Trypsin (b) Lipase (c) Enterokinase (d) Enterocrinin
Last Answer : (d) Enterocrinin
Description : Enzyme arginase is found in (a) Mouth cavity (b) Stomach (c) Intestine (d) Liver
Last Answer : (d) Liver
Description : Substance which increase the activity of certain enzymes called (a) Pro-enzyme (b) Iso-enzymes (d) Co-enzymes (d) Catalysis
Last Answer : c
Description : Non protein part of enzyme is called (a) Iso-enzyme (b) Holo-enzyme (c) Apo-enzyme (d)Prosthatic group
Last Answer : (d)Prosthatic group
Description : By consumption of milk and milk products some human beings develop intestinal gas and diarrhoea due to absence of which enzyme (a) Lactase (b) Galactase (c) Protease (d) Rennin
Last Answer : (a) Lactase
Description : Invertase enzyme acts upon (a) Proteins (b) Maltose (c) Fructose (d) Sucrose
Last Answer : (d) Sucrose
Description : Enzyme responsible for the digestion of starch in food of main is Present in (e) Salivary and gastric secretion. (b) Salivary and pancreatic secretion (c) Gastric and pancreatic secretion (d) Gastric and duodenal secretion
Last Answer : (b) Salivary and pancreatic secretion
Description : Below freezing point an enzyme is (a) Inactivated (b) Activated (c) Destroyed (d) Unaffected
Last Answer : (a) Inactivated
Description : Enterokinase is (a) Enzyme (b) Hormone (c) Vitamin (d) None
Last Answer : (a) Enzyme
Description : The enzyme which can act in Acidic and basic media both (a) Lipase (b) Trypsin (c) Pepsin (d) Ptyalin
Last Answer : (d) Ptyalin
Description : The enzyme for starch digestion (a) Maltase (b) Invertase (c) Lipase (d) Amylase
Last Answer : (d) Amylase
Description : Which enzyme digests plant protein (a) Pepsin (b) Erepsin (c) Renin (d) All these
Last Answer : (a) Pepsin
Description : The antidotal effect of sodium nitrite in cyanide poisoning is dependent upon: A. Chemical combination of sodium nitrite with cyanide B. Vasodilatation caused by sodium nitrite C. ... haemoglobin to methaemoglobin by sodium nitrite D. Facilitation of cyanocobalamine formation by sodium nitrite
Last Answer : C. Conversion of haemoglobin to methaemoglobin by sodium nitrite
Description : The antidotal action of sodium nitrite in cyanide poisoning is based on: A. Physical antagonism B. Chemical antagonism C. Physiological antagonism D. Noncompetitive antagonism
Last Answer : B. Chemical antagonism
Description : Which of the following drug can result in result in cyanide poisoning? A. Amyl nitrite B. Hydroxycobalamine C. Sodium nitroprusside D. Sodium thiosulphate
Last Answer : C. Sodium nitroprusside
Description : Zymogen is a (A) Vitamin (B) Enzyme precursor (C) Modulator (D) Hormone
Description : Zymogen is (A) An intracellular enzyme (B) Serum enzyme (C) A complete extracellular enzyme (D) An inactivated enzyme
Description : During biological nitrogen fixation, inactivation of nitrogenase by oxygen poisoning is prevented by (a) carotene (b) cytochrome (c) leghaemoglobin (d) xanthophyll
Last Answer : (c) leghaemoglobin
Description : Deficiency of B, causes (a) Burning feet syndrome (b) Morning disease (c) Chelosis (d) None
Last Answer : (a) Burning feet syndrome
Description : Deficiency of vitamin E causes (a) Beri-beri (b) Scurvy (c) Reduced reproductive capacity (d) Impotancy
Last Answer : (d) Impotancy
Description : Deficiency of calcium causes (a) Scurvy (b) Rickets (c) Gigantism (d) Addison’s disease
Last Answer : (b) Rickets
Description : Deficiency of which of the following causes chelosis : (a) Pyridoxine (b) Folic Acid (c) Niacin (d) Riboflavin
Last Answer : (d) Riboflavin
Description : Deficiency of vitamin C causes : (a) Chelosis (b) Scurvy (c) Pellagra (d) Anemia
Last Answer : (b) Scurvy
Description : Deficiency of thiaminc causes : (a) Beriberi (b) Chelosis (c) Anemia (d) Roup
Last Answer : (a) Beriberi
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
Description : The enzyme using some other substance, not oxygen as hydrogen acceptor is (A) Tyrosinase (B) Succinate dehydrogenase (C) Uricase (D) Cytochrome oxidase