Homework Answers
Enzymes are proteins that acts as biocatalyst . Catalyst increase the rate of a chemical reaction . Enzymes are highly specific in terms of reactions that they catalyse as well as the reactants ( substrate ) . An Enzyme inhibitor is a molecule that binds to an Enzyme and decreases its activity .
Thus ,
All of the following describe Enzymes EXCEPT
b) Decrease rate of reaction .
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18. All of the following describe enzymes EXCEPT: a. Specific catalysts b. Decrease rate of reaction...
All of the following statements about enzymes are true EXCEPT a. they speed up chemical reactions...
All of the following statements about enzymes are true EXCEPT a. they speed up chemical reactions without changing themselves b. enzymes are proteins c. they are highly specific d. they are biological catalysts e. they are used up in a chemical reaction
All of the following are true of enzymes except: a. they are not consumed in the...
All of the following are true of enzymes except: a. they are not consumed in the reaction they catalyze b. they are only used in synthesis reactions c. they are specific for the reaction they catalyze d. they increase the rate at which a chemical reaction occurs
Q1: List four important properties of enzymes. Q2: Describe negative feedback inhibition. Q3: Catalysts are believed...
Q1: List four important properties of enzymes. Q2: Describe negative feedback inhibition. Q3: Catalysts are believed to lower the activation energy of the transition state in a chemical reaction. [30% Points) Q4: Describe the difference between reversible and irreversible inhibitors. Give an example of each. [30% Points)
Enzymes are biological catalysts and Unction by A) increasing the free energy in a system. B)...
Enzymes are biological catalysts and Unction by A) increasing the free energy in a system. B) lowering the activation energy of a reaction. C) lowering entropy in a system. D) increasing the temperature near a reaction. E) altering the equilibrium of a reaction. Which of the following contributes to the specificity of enzymes? A) Each enzyme has a wide range of temperature and pH optimum B) Each enzyme has an active site that interacts with many C) Substrates themselves may...
QUESTION 28 Among the following statements concerning the enzymes, all correct answers An apoenzyme consists of...
QUESTION 28 Among the following statements concerning the enzymes, all correct answers An apoenzyme consists of a holoenzyme and a.coenzyme Enzymes are biological catalysts that do not affect the reaction equilibrium The rate of reaction depends on the pH The catalytic site is formed of an active site and binding sites The activation energy of the uncatalyzed reaction is greater than the activation energy of the catalyzed reaction QUESTION 29 Which of the following statements are corrects? When the substrate...
Questiull Which of the following are common characteristics of allosteric enzymes? Choose all that apply. Reaction...
Questiull Which of the following are common characteristics of allosteric enzymes? Choose all that apply. Reaction rate regulated by effector molecules Usually have multiple catalytic subunits Often catalyze the committed step in a biochemical pathway Hyperbolic rate curves Often fibrous proteins Insensitive to inhibitors Question 15 0.25 pts What did John Northrop win the Nobel Prize for?
QUESTION 5 Which of the following statements about a catalyst is true? Catalysts decrease the activation...
QUESTION 5 Which of the following statements about a catalyst is true? Catalysts decrease the activation energy of a reaction. Catalysts decrease the rate of the forward reaction. Catalysts cause a system at equilibrium to shift towards the products. Catalysts cause a system at equilibrium to shift towards the reactants. Catalysts decrease the rate of the reverse reaction.
The following statements about enzymes are true, except: a. they are proteins tbat speed up chemical reactions....
The following statements about enzymes are true, except: a. they are proteins tbat speed up chemical reactions. b. they are often consumed or destroyed in the reaction. c. the active site is the location of the chemical reaction. d. their function can be affected by salt concentration or pH
All of the following enzymes are involved in carbohydrate digestion except: a. salivary amylase b. pancreatic...
All of the following enzymes are involved in carbohydrate digestion except: a. salivary amylase b. pancreatic amylase c. lactase d. maltase e carboxypeptidase
2. Enzymes are important biological molecules and they act as catalysts for specific chemical reactions. Their...
2. Enzymes are important biological molecules and they act as catalysts for specific chemical reactions. Their biological function is determined by their 3 dimensional shape and the functional groups present in the active site. (a) What are the main mechanisms by which an enzyme increase the rate of a reaction? (b) What is a cofactor in an enzyme mediated reaction? (c) Give the name of a cofactor (structure if possible) and indicate the type of reaction that it facilitates. 3....
Q1: List four important properties of enzymes. Q2: Describe negative feedback inhibition. Q3: Catalysts are believed to lower the activation energy of the transition state in a chemical reaction. [30% Points) Q4: Describe the difference between reversible and irreversible inhibitors. Give an example of each. [30% Points)
Enzymes are biological catalysts and Unction by A) increasing the free energy in a system. B) lowering the activation energy of a reaction. C) lowering entropy in a system. D) increasing the temperature near a reaction. E) altering the equilibrium of a reaction. Which of the following contributes to the specificity of enzymes? A) Each enzyme has a wide range of temperature and pH optimum B) Each enzyme has an active site that interacts with many C) Substrates themselves may...
QUESTION 28 Among the following statements concerning the enzymes, all correct answers An apoenzyme consists of a holoenzyme and a.coenzyme Enzymes are biological catalysts that do not affect the reaction equilibrium The rate of reaction depends on the pH The catalytic site is formed of an active site and binding sites The activation energy of the uncatalyzed reaction is greater than the activation energy of the catalyzed reaction QUESTION 29 Which of the following statements are corrects? When the substrate...
Questiull Which of the following are common characteristics of allosteric enzymes? Choose all that apply. Reaction rate regulated by effector molecules Usually have multiple catalytic subunits Often catalyze the committed step in a biochemical pathway Hyperbolic rate curves Often fibrous proteins Insensitive to inhibitors Question 15 0.25 pts What did John Northrop win the Nobel Prize for?
QUESTION 5 Which of the following statements about a catalyst is true? Catalysts decrease the activation energy of a reaction. Catalysts decrease the rate of the forward reaction. Catalysts cause a system at equilibrium to shift towards the products. Catalysts cause a system at equilibrium to shift towards the reactants. Catalysts decrease the rate of the reverse reaction.
All of the following enzymes are involved in carbohydrate digestion except: a. salivary amylase b. pancreatic amylase c. lactase d. maltase e carboxypeptidase
2. Enzymes are important biological molecules and they act as catalysts for specific chemical reactions. Their biological function is determined by their 3 dimensional shape and the functional groups present in the active site. (a) What are the main mechanisms by which an enzyme increase the rate of a reaction? (b) What is a cofactor in an enzyme mediated reaction? (c) Give the name of a cofactor (structure if possible) and indicate the type of reaction that it facilitates. 3....
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