1) An enzyme that catalyzes the transformation of one substrate is characterized by the following specificity: a)absolute: b) relative; c) stereospecificity; d)allosteric: e) group. 2) Most food and microbial enzymes are destroyed at {}^circ C a) 15 b) 25 c) 37 d) 80 3) Regulation of enzyme activity cannot be carried out by: a) covalent chemical modification; b) formation of a substrate-substrate complex; c) allosteric regulation; d) partial proteolysis. 4) The division of enzymes into classes is based on: a) substrate structure b) structure of coenzymes c) structure of reaction products d) type of catalyzed reaction 5) The Michaelis-Menten equation. If for Enzyme "A" Vmax equals to 100mu mol/mL sec and Km equals to 2 mM, what is the velocity of the reaction when substrate "B"concentration equals to 20 mM?

Question

1) An enzyme that catalyzes the transformation of one substrate is characterized by the following specificity: a)absolute: b) relative; c) stereospecificity; d)allosteric: e) group. 2) Most food and microbial enzymes are destroyed at {}^circ C a) 15 b) 25 c) 37 d) 80 3) Regulation of enzyme activity cannot be carried out by: a) covalent chemical modification; b) formation of a substrate-substrate complex; c) allosteric regulation; d) partial proteolysis. 4) The division of enzymes into classes is based on: a) substrate structure b) structure of coenzymes c) structure of reaction products d) type of catalyzed reaction 5) The Michaelis-Menten equation. If for Enzyme "A" Vmax equals to 100mu mol/mL sec and Km equals to 2 mM, what is the velocity of the reaction when substrate "B"concentration equals to 20 mM?

Answer 1

1) An enzyme that catalyzes the transformation of one substrate is characterized by the following specificity:a) absolute: This is the correct answer. Absolute specificity refers to an enzyme that catalyzes the transformation of only one substrate.2) Most food and microbial enzymes are destroyed at

c) 37: This is the correct answer. Most food and microbial enzymes are destroyed at 37°C, which is the optimal temperature for the growth of many microorganisms.3) Regulation of enzyme activity cannot be carried out by:b) formation of a substrate-substrate complex: This is the correct answer. The formation of a substrate-substrate complex is not a method of regulating enzyme activity.4) The division of enzymes into classes is based on:d) type of catalyzed reaction: This is the correct answer. Enzymes are divided into classes based on the type of reaction they catalyze.5) The Michaelis-Menten equation. If for Enzyme "A" Vmax equals to

sec and Km equals to 2 mM, what is the velocity of the reaction when substrate "B" concentration equals to 20 mM?To solve this question, we can use the Michaelis-Menten equation:V = (Vmax \* [S]) / (Km + [S])where V is the velocity of the reaction, Vmax is the maximum velocity, [S] is the substrate concentration, and Km is the Michaelis constant.Given that Vmax = 100 μmol/mL sec and Km = 2 mM, we can substitute these values into the equation:V = (100 μmol/mL sec \* 20 mM) / (2 mM + 20 mM)V = 2000 μmol/mL sec / 22 mMV ≈ 90.91 μmol/mL secTherefore, the velocity of the reaction when the substrate "B" concentration equals to 20 mM is approximately 90.91 μmol/mL sec.

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