Which statement about enzyme catalyzed reactions is not true? a) enzymes form complexes with their substrates....
Which statement about enzyme catalyzed reactions is not true?
a) enzymes form complexes with their substrates.
b) enzymes lower the activation energy for chemical reactions.
c) enzymes change the K eq for chemical reactions.
d) many enzymes change shape slightly when substrate binds.
e) reactions occur at the "active site" of enzymes, where a precise 3D
orientation of amino acids is an important feature of catalysis.
Homework Answers
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Which statement about enzyme catalyzed reactions is not
true?
a) enzymes form complexes with their substrates....
9. Which of the following statements about enzyme catalyzed reactions is NOT true? a. Enzymes form...
9. Which of the following statements about enzyme catalyzed reactions is NOT true? a. Enzymes form complexes with their substrates b. Enzymes lower the activation energy for chemical reactions c. Enzymes change the Key for chemical reactions d. Many enzymes change shapes slightly when substrate binds 10. To overcome an energy barrier between reactants and products, energy must be provided to get the reaction started. This energy, which is recovered as the reaction proceeds, is called: a. Activation energy b....
Part A - Overview of enzyme structure and enzymatic reactions Enzymes are large globular proteins. Much...
Part A - Overview of enzyme structure and enzymatic reactions Enzymes are large globular proteins. Much of their three dimensional shape is the result of interactions between the R (variable) groups of their amino acids. The active site is the portion of the enzyme that will interact with the substrate the molecule that the enzyme acts upon. The nature and arrangement of amino acids in the active site make each enzyme specific to a substrate and to the reaction it...
Which statement about enzyme catalysis is false? All of the active site amino acids are next...
Which statement about enzyme catalysis is false? All of the active site amino acids are next to each other in the primary sequence. Enzymes speed up reactions by forming specific non-covalent bonds between the enzyme amino acids and the transition state molecule. Some enzymes require other molecules, called cofactors, to carry out chemical reactions. Generally, the most important amino acids for an enzyme's function are those in the active site. Question 6 1 pt When [S] is much more than...
The rate of an enzyme-catalyzed reaction initially increases with an increase in the substrate concentration, but...
The rate of an enzyme-catalyzed reaction initially increases with an increase in the substrate concentration, but eventually reaches a maximum value, even though the concentration of substrate continues to increase. Which of the following best explains why? O As substrate concentration increases, the substrates preferentially bind with each other instead of the active site of the enzyme, and no additional catalysis occurs. As substrate concentration increases, the active sites of all the enzyme molecules become occupied with substrate molecules, and...
The following occur in enzyme-catalyzed reactions except A. The substrate is transformed at the active site...
The following occur in enzyme-catalyzed reactions except A. The substrate is transformed at the active site B. The enzyme does not undergo any change change C. Enzyme-substrate complex is formed O D. Activation energy of the reaction is increased O E. Activation energy is lowered QUESTION 34 bonds In the alpha helical structure of the DNA, the base G pairs with the base c by A. 3 hydrogen B. 3 covalent C. 2 covalent D.3 amide E. 2 hydrogen
describe the role of enzymes in the catalysis of biological reactions (include in the discussion substrate,...
describe the role of enzymes in the catalysis of biological reactions (include in the discussion substrate, product, active site, lock and key model, activation energy, enzyme substrate complex, and transition state complex, and steps of enzyme action)?
BIOCHEMISTRY please answers the both questions Q1: Which of the following statements about enzymes are true?...
BIOCHEMISTRY please answers the both questions Q1: Which of the following statements about enzymes are true? (Check all that apply) A) Enzymes affect the activation energy of the reaction. b) Enzymes affect the equilibrium position of a chemical reaction. c) Enzymes affect the Gibbs Free Energy change of a chemical reaction. d) Enzymes decrease the time needed for a reaction to reach equilibrium. Q2: What best describes the nature of the active site. a) It is a rigid pocket that...
1 2 3 4 5 6 7 8 9 Part A Which of the following is/are...
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Part A Which of the following is/are means whereby a catalyst can lower the activation energy of a reaction? quantum tunneling decreasing the number of reactive molecules permanently binding substrates inefficient collisions altering the temperature within the cell to one appropriate for reactions to proceed Subrnit Request Answer Part A An enzyme Obinds substrates in a manner that facilitates the formation of product decreases the rate of a reaction. is always...
All of the following apply to enzyme structure and function EXCEPT: (choose what does not apply...
All of the following apply to enzyme structure and function EXCEPT: (choose what does not apply to the question) A. enzyme active sites function to lower the activation energy of substrate molecules B. enzymes may require coenzymes that change the shape of the active site C. enzymes increase the speed of chemical reactions D. enzymes may have allosteric sites that are used to regulate substrate-active site binding E. enzymes may require cofactors such as Ca++ that improve the binding of...
2. How enzyme reactions work Aa Aa 3 The following image is a simplified illustration of...
2. How enzyme reactions work Aa Aa 3 The following image is a simplified illustration of how enzymes catalyze reactions in cells. Click the boxes and correctly label the molecules in the image. Substrate DNA Product -Enzyme Coenzyme The table provides descriptions of what is occurring at steps A, B, and in the reaction. Review the descriptions, then choose the letter from the image that matches each description in the left-hand column of the table. Step Description Product(s) released; the...
9. Which of the following statements about enzyme catalyzed reactions is NOT true? a. Enzymes form complexes with their substrates b. Enzymes lower the activation energy for chemical reactions c. Enzymes change the Key for chemical reactions d. Many enzymes change shapes slightly when substrate binds 10. To overcome an energy barrier between reactants and products, energy must be provided to get the reaction started. This energy, which is recovered as the reaction proceeds, is called: a. Activation energy b....
Part A - Overview of enzyme structure and enzymatic reactions Enzymes are large globular proteins. Much of their three dimensional shape is the result of interactions between the R (variable) groups of their amino acids. The active site is the portion of the enzyme that will interact with the substrate the molecule that the enzyme acts upon. The nature and arrangement of amino acids in the active site make each enzyme specific to a substrate and to the reaction it...
Which statement about enzyme catalysis is false? All of the active site amino acids are next to each other in the primary sequence. Enzymes speed up reactions by forming specific non-covalent bonds between the enzyme amino acids and the transition state molecule. Some enzymes require other molecules, called cofactors, to carry out chemical reactions. Generally, the most important amino acids for an enzyme's function are those in the active site. Question 6 1 pt When [S] is much more than...
The rate of an enzyme-catalyzed reaction initially increases with an increase in the substrate concentration, but eventually reaches a maximum value, even though the concentration of substrate continues to increase. Which of the following best explains why? O As substrate concentration increases, the substrates preferentially bind with each other instead of the active site of the enzyme, and no additional catalysis occurs. As substrate concentration increases, the active sites of all the enzyme molecules become occupied with substrate molecules, and...
The following occur in enzyme-catalyzed reactions except A. The substrate is transformed at the active site B. The enzyme does not undergo any change change C. Enzyme-substrate complex is formed O D. Activation energy of the reaction is increased O E. Activation energy is lowered QUESTION 34 bonds In the alpha helical structure of the DNA, the base G pairs with the base c by A. 3 hydrogen B. 3 covalent C. 2 covalent D.3 amide E. 2 hydrogen
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Part A Which of the following is/are means whereby a catalyst can lower the activation energy of a reaction? quantum tunneling decreasing the number of reactive molecules permanently binding substrates inefficient collisions altering the temperature within the cell to one appropriate for reactions to proceed Subrnit Request Answer Part A An enzyme Obinds substrates in a manner that facilitates the formation of product decreases the rate of a reaction. is always...
2. How enzyme reactions work Aa Aa 3 The following image is a simplified illustration of how enzymes catalyze reactions in cells. Click the boxes and correctly label the molecules in the image. Substrate DNA Product -Enzyme Coenzyme The table provides descriptions of what is occurring at steps A, B, and in the reaction. Review the descriptions, then choose the letter from the image that matches each description in the left-hand column of the table. Step Description Product(s) released; the...
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