Description : From the L ineweaver-Burk p lot of Michaelis-Menten equation, Km and Vmax can be determined when V is the reaction velocity at substrate concentration S, the X-axis experimental data are expressed as (A) 1/V (B) V (C) 1/S (D) S
Last Answer : Answer : C
Description : A sigmoidal plot of substrate concentration ([S]) verses reaction velocity (V) may indicate (A) Michaelis-Menten kinetics (B) Co-operative binding (C) Competitive inhibition (D) Non-competitive inhibition
Last Answer : Answer : B
Description : Kinetics of an allosteric enzyme are explained by (A) Michaelis-Menten equation (B) Lineweaver-Burk plot (C) Hill plot (D) All of these
Description : Which one of the following statements is not characteristic of allosteric enzymes? (A) They frequently catalyze a committed step early in a metabolic pathway (B) They are often composed of subunits (C) They follow Michaelis-Menten kinetics (D) They frequently show cooperativity for substrate binding
Description : The Michaehis-Menten hypothesis: (A) Postulates the formation of an enzyme substrate complex (B) Enables us to calculate the isoelectric point of an enzyme (C) States that the ... independent of substrate concentration (D) States that the reaction rate is proportional to substrate concentration
Last Answer : Answer : A
Description : Substrate concentration at which an enzyme attains half its maximum velocity is (A) Threshold value (B) Michaelis-Menton constant (C) Concentration level (D) None of these
Description : The Michaelis constant, Km is (A) Numerically equal to ½ Vmax (B) Dependent on the enzyme concentration (C) Independent of pH (D) Numerically equal to the substrate concentration that gives half maximal velocity
Last Answer : Answer : D
Description : ........................ studied the kinetics of enzyme catalysis. a. Arrhenius b. Rutherford c. Micheal Faraday d. Michaelis & Menten
Last Answer : d. Michaelis & Menten
Description : What is Michaelis-Menten Theory ?
Last Answer : It is otherwise called enzyme-substrate complex theory. The enzyme combines with the substrate, to form an enzyme-substrate complex, which immediately breaks down to the enzyme and the product.
Description : An enzyme is a (A) Carbohydrate (B) Lipid (C) Protein (D) Nucleic acid ENZYMES 171
Description : What is Michaelis Menten constant? -Biology
Last Answer : answer:
Description : Choose the correct enzyme - substrate pair. (a) Carbohydrate - Lipase (b) Maltase - Lactose (c) Rennin - Casein (d) Protein - Amylase
Last Answer : (c) Rennin - Casein
Description : Feedback term refers to (A) Effect of substrate on rate of enzymatic reaction (B) Effect of end product on rate reaction (C) Effect of enzyme concentration on rate of reaction (D) Effect of external compound on rate of reaction
Description : Humans most easily tolerate a lack of the nutrient: (A) Protein (B) Lipid (C) Iodine (D) Carbohydrate
Description : Humans most easily tolerate a lack of which of the following nutrients? (A) Protein (B) Iodine (C) Carbohydrate (D) Lipid
Description : The building up and breaking down of protoplasm are concerned with the metabolism of (A) Carbohydrate (B) Lipid (C) Protein (D) Minerals
Description : What is the effect of substrate concentration on enzyme activity? -Biology
Description : Km value of enzyme is substrate concentration at (A) ½ Vmax (B) 2 Vmax (C) ½ Vmax (D) 4 Vmax
Description : The rate of an enzyme catalyzed reaction was measured using several substrate concentrations that were much lower than Km, the dependence of reaction velocity on substrate concentration can best be ... constant fraction of Vmax (C) Equal to Km (D) Proportional to the substrate concentration
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
Description : When [s] is equal to Km, which of the following conditions exist? (A) Half the enzyme molecules are bound to substrate (B) The velocity of the reaction is equal to Vmax (C) The velocity of the reaction is independent of substrate concentration (D) Enzyme is completely saturated with substrate
Description : Velocity maximum for an enzyme at half the substrate concentration gives (A) The molecular weight of the enzyme (B) Km value (C) Isoelectric pH (D) Pk value
Description : If the substrate concentration is much below the km of the enzyme, the velocity of the reaction is (A) Directly proportional to substrate concentration (B) Not affected by enzyme concentration (C) Nearly equal to Vmax (D) Inversely proportional to substrate concentration
Description : In enzyme assays, all the following are kept constant except (A) Substrate concentration (B) Enzyme concentration (C) pH (D) Temperature
Description : Competitive inhibition can be relieved by raising the (A) Enzyme concentration (B) Substrate concentration (C) Inhibitor concentration (D) None of these
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 : In enzyme kinetics Km implies (A) The substrate concentration that gives one half Vmax (B) The dissocation constant for the enzyme substrate comples (C) Concentration of enzyme (D) Half of the substrate concentration required to achieve Vmax
Description : In enzyme kinetics Vmax reflects (A) The amount of an active enzyme (B) Substrate concentration (C) Half the substrate concentration (D) Enzyme substrate complex
Description : Different isoenzymes of an enzyme have the same (A) Amino acid sequence (B) Michaelis constant (C) Catalytic activity (D) All of these
Description : The hormone insulin is chemically a (a) fat (b) lipid (c) protein (d) carbohydrate
Last Answer : Ans:(c)
Description : Nitrogenous food is (1) Carbohydrate (2) Lipid (3) Protein (4) Salts
Last Answer : (3) Protein Explanation: All proteins contain nitrogen. Precisely, they contain about 16 per cent nitrogen. The determination of protein requirement is based,on nitrogen balance, which include total nitrogen in food and excreta.
Description : Virus contains - (1) Protein and lipid (2) Nucleic acid and protein (3) Lipid and carbohydrate (4) Carbohydrate and nucleic acid
Last Answer : (1) Protein and lipid Explanation: Virus particles (known as virions) consist of two or three parts: the genetic material made from either DNA or RNA, long molecules that carry genetic ... cell. The shapes of viruses range from simple helical and icosahedra forms to more complex structures.
Description : Exon part of mRNAs have code for (a) protein (b) lipid (c) carbohydrate (d) phospholipid.
Last Answer : b) lipid
Last Answer : (a) protein
Description : Collagen is (a) fibrous protein (b) globular protein (c) lipid (d) carbohydrate.
Last Answer : (a) fibrous protein
Description : Pepsin acts on : (a) Protein (b) Lipid (c) Carbohydrate (d) All these
Last Answer : (a) Protein
Last Answer : Protein
Description : Virus contains (1) Protein and lipid (2) Nucleic acid and protein (3) Lipid and carbohydrate (4) Carbohydrate and nucleic acid
Last Answer : Protein and lipid
Description : The phenomenon of inhibition of glycolysis by O2 is termed as (A) Red drop (B) Pasteur effect (C) Michaelis effect (D) Fischer’s effect
Description : Concentration of substrate on enzyme activity. -Biology
Description : The curve given below shows enzymatic activity in relation to three conditions (pH, temperature and substrate concentration). What do the two axes (X and Y) represent? X-axis ... (b) Temperature Enzyme activity (c) Substrate Enzymatic concentration activity (d) Enzymatic activity Temperature
Last Answer : (b) Temperature Enzyme activity
Description : Define Michaelis constant of an enzyme. -Biology
Description : Which one of the following statements regarding enzyme inhibition is correct? (a) Competitive inhibition is seen when a substrate competes with an enzyme for binding to an inhibitor protein. (b ... large amount of substrate. (d) Non-competitive inhibitors often bind to the enzyme irreversibly.
Last Answer : (b) Competitive inhibition is seen when the substrate and the inhibitor compete for the active site on the enzyme
Description : Induction of drug metabolizing enzymes involves: A. A conformational change in the enzyme protein to favour binding of substrate molecules B. Expression of enzyme molecules on the surface of ... C. Enhanced transport of substrate molecules into hepatocytes D. Increased synthesis of enzyme protein
Last Answer : D. Increased synthesis of enzyme protein
Description : The hypothesis to explain enzyme– substrate complex formation: (A) Lock and key model (B) Induced fit theory (C) Proenzyme theory (D) Both (A) and (B)
Description : Animals do not have enzyme systems which enable them to make use of the energy from - (1) fat (2) water (3) protein (4) carbohydrate
Last Answer : (1) fat Explanation: Although fat is a common way of storing energy. In vertebrates such as humans the fatty acids in these stores cannot be conberted to glucose through gluconeogenesis as these organisms cannot convert acetyl CoA in to pyruvate plants do.
Description : Animals do not have enzyme systems which enable them to make use of the energy from : (1) fat (2) water (3) protein (4) carbohydrate
Last Answer : fat
Description : $ The chief respiratory substrate of a cell is carbohydrate ! Fermentaiton is also called Glycolytic pathway.
Last Answer : $ The chief respiratory substrate of a cell is carbohydrate ! Fermentaiton is also called Glycolytic pathway. A. ... D. If both As and R are wrong.
Description : Flagella are a. Made of carbohydrate and lipid. b. Found on all bacterial cells. c. Contain dextran fiber d. Important for chemo taxis.
Last Answer : d. Important for chemo taxis.