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 : 20. Which one of the following statements is incorrect about enzyme catalysis? (1) Enzymes are least reactive at optimum temperature (2) Enzymes are mostly proteinous in nature (3) Enzyme action is specific (4) Enzymes are denaturated by ultraviolet rays and at high temperature
Last Answer : Enzymes are least reactive at optimum temperature
Description : Clewing of food in mouth is for: (a) Tasting (b) Making the food soluble (c)Increasing the surface area of food for activity of enzymes (d) None
Last Answer : (c)Increasing the surface area of food for activity of enzymes
Description : Isozymes or iso enzymes are those enzyme which A- have same structural forms B- have different structural forms but identical catalytic properties C- catalyses oxidation reactions D- none of these
Last Answer : have different structural forms but identical catalytic properties
Description : Template/lock and key theory of enzyme action is supported by (A) Enzymes speed up reaction (B) Enzymes occur in living beings and speed up certain reactions (C) Enzymes determine the direction of reaction (D) Compounds similar to substrate inhibit enzyme activity
Last Answer : Answer : D
Description : Prosthetic groups differ from co-enzymes in that (a) they require metal ions for their activity (b) they (prosthetic groups) are tightly bound to apoenzymes (c) their association with apoenzymes is transient (d) they can serve as co-factors in a number of enzyme-catalyzed reactions.
Last Answer : (b) they (prosthetic groups) are tightly bound to apoenzymes
Description : Which of the following is produced from pancreas (a) 3 digestive enzymes and 3 hormone (b) 2 digestive enzymes and I hormone (c) 3 digestive enzymes and 2 hormone (d) 3 digestive enzymes and I hormone
Last Answer : (c) 3 digestive enzymes and 2 hormone
Description : Liver produce (a) Many enzymes (b) Many digestive enzymes (c) No digestive enzymes (d) None
Last Answer : (c) No digestive enzymes
Description : Digestive enzymes are (a) oxidative (b) Hydrolytic (c) Synthetic (d) None of these
Last Answer : (b) Hydrolytic
Description : All enzymes chemically speaking are (a) Lipids (b) Carbohydrate (c) proteins (d) All
Last Answer : (c) proteins
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 : Which are enzymes of gastric gland (a) Trypsin and rennin (b) Pepsin and rennin (c) Lipase and trypsin (d) Vessopressin and lipase
Last Answer : (b) Pepsin and rennin
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 : Destruction of which of the following enzyme causes cyanide poisoning (a) Zymogen (b) Cytochrome enzyme (c) Urease (d) None of these
Last Answer : (b) Cytochrome enzyme
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 : (4) None of these Explanation: Catalysis is the change in rate of a chemical reaction due to the participation of a substance called a catalyst. Unlike other reagents that ... may participate in multiple chemical transformations. Catalysts that speed the reaction are called positive catalysts.
Last Answer : Table salt gets moist during rainy season because – (1) sodium chloride is hygroscopic (2) sodium chloride is deliquescent (3) sodium chloride contains some quantity of sodium iodide (4) sodium chloride contains hygroscopic impurities like magnesium chloride
Description : Oxidation of which substance in the body yields the most calories (A) Glucose (B) Glycogen (C) Protein (D) Lipids
Last Answer : (D) Lipids
Description : Which one of the following statements is incorrect about enzyme catalysis ?
Last Answer : Which one of the following statements is incorrect about enzyme catalysis ? A. Enzymes are ... at optimum temperature D. Enzymes action is specific
Description : ........................ studied the kinetics of enzyme catalysis. a. Arrhenius b. Rutherford c. Micheal Faraday d. Michaelis & Menten
Last Answer : d. Michaelis & Menten
Description : Which of the following vitamin does not have coenzyme activity (a) Folic Acid (b) Riboflavin (c) Biotin (d) Tocopherol (Vitamin E)
Last Answer : (d) Tocopherol (Vitamin E)
Description : Diastema is associated with (a) Presence of certain teeth (b) Organ of corti (c) Retinal cells (d) Absence of certain teeth
Last Answer : (d) Absence of certain teeth
Description : Frog is not able to digest cellulose but the rabbit can do so as rabbit has (a) Duodenum where cellulose are digested (b) Stomach which contain certain cellulose digesting bacteria (c) Caecum where cellulose digested (d) None of the above
Last Answer : (c) Caecum where cellulose digested
Description : What do you mean by activity and selectivity of catalysis?
Last Answer : Ans. Activity of catalyst means to increase the extent of chemisorption. Selectivity of Catalyst means to direct a reaction to form selective product.
Description : Which of the following is not a dimension-less group used in catalysis? (Where, D = dispersion co-efficient, cm2 /sec.D1 = diffusion co-efficient; cm2 /sec L = length of the reactor, cm t = time, sec, v = volumetric ... (D/vL) (B) Reduced time (vt/V) (C) Thiele modulus L √(k/D1 ) (D) None of these
Last Answer : (D) None of these
Description : In Jaundice level of one of following increase in blood (a) Bile juice (b) Bile pigments (c) Haemoglobin (d) All
Last Answer : (b) Bile pigments
Description : Which of the following hormone increase gas tric secretion (a) Gastrin (b) CCK (c) Enterogastrone (d) None
Last Answer : (a) Gastrin
Description : Which of the following is incorrect about heterogeneous catalysis? a. The most effective catalysts are those which have small surface area b. Seperation of catlyst is easy c. Increase in the rate of reaction is due to decrease in the activation energy d. It is based upon the phenomenon of adsorption
Last Answer : a. The most effective catalysts are those which have small surface area
Description : Enzymes activity is controlled by (A) pH of the solution (B) Temperature (C) Concentration of the enzyme (D) Concentration of the substrate (E) All of these
Last Answer : Answer : C
Description : In biosynthesis of cholesterol triparanol inhibits the activity of the enzyme: (A) ∆24 Reductase (B) Oxidosqualene-lanosterol cyclase (C) Isomerase (D) Squalene epoxidase ENZYMES 155
Last Answer : Answer : A
Description : Lineweaver – Burk double reciprocal plot is related to (A) Substrate concentration (B) Enzyme activity (C) Temperature (D) Both (A) and (B) ENZYMES 145
Description : Which one is an essential mineral, not constituent of any enzyme but stimulates the activity of many enzymes? (a) Zn (b) Mn (c) K (d) Mg
Last Answer : (c) K
Description : Pick out the wrong statement. (A) Catalytic activity of enzyme catalysed reactions which is affected by temperature, pH value & chemical agents, is maximum at a temperature of about 45°C ... in enzyme catalysed reactions can be calculated by using the thermodynamic properties of substrates & prod
Last Answer : (C) Enzymes help in increasing the activation energy of the reaction
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 : A demonstrable inducer is absent in (A) Allosteric enzyme (B) Constitutive enzyme (C) Inhibited enzyme (D) Co-operative enzyme ENZYMES 141
Last Answer : Answer : B
Description : Boron in green plants assists in (a) activation of enzymes (b) acting as enzyme co-factor (c) photosynthesis (d) sugar transport.
Last Answer : (d) sugar transport.