Indicate whether each of the following statements about an enzyme active site is true or false. It is the location where substrate molecules are produced. It always has a fixed, rigid geometry. It always has a geometrical shape exactly complementary to that of substrate. It always accommodates several structurally related substrates. It is the location where substrate molecules are converted to product molecules. It always has a shape that has a degree of flexibility to it. It always accommodates only one specific substrate.

Indicate whether each of the following statements about an enzyme active site is true or false. It is the location where substrate molecules are produced. It always has a fixed, rigid geometry. It always has a geometrical shape exactly complementary to that of substrate. It always accommodates several structurally related substrates. It is the location where substrate molecules are converted to product molecules. It always has a shape that has a degree of flexibility to it. It always accommodates only one specific substrate.

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter6: Energy, Enzymes, And Biological Reactions

Section: Chapter Questions

Problem 1TYK: The capacity to do work best defines: a metabolic pathway. entropy. kinetic or potential energy. a...

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Enzymes _______. a. enhance reaction rates b. are affected by pH c. act on specific substrates d. all of the above
Indicate whether each of the following statements about an enzyme active site is true or false. a. It is the location where substrate molecules are produced. b. It always has a fixed, rigid geometry. c. It always has a geometrical shape exactly complementary to that of substrate. d. It always accomodates several structurally related substrates. e. It is the location where substrate molecules are converted to product molecules. f. It always has a shape that has a degree of flexibility to it. g. it always accomodates only one specific substrate.
When the enzyme hexokinase binds to glucose and ATP it undergoes a conformational change. All of the following are true about this enzyme-substrate binding EXCEPT: The active site changes shape so that it binds more tightly to the substrates The substrates are optimally positioned for the reaction to occur The substrates become contorted or strained, which increases their reactivity The activation energy of the reaction increases
All of the following are characteristics of the active site of an enzyme EXCEPT? It has less water content compared to the cytoplasm. It is found somewhere in the interior of the enzyme. It is the binding site for many different kinds of molecules. It has a complementary shape to its substrate.
Which of the following statements regarding enzymes and transition states is true? stabilization of the transition state must be less than stabilization of ES for catalysis to occur binding of substrate to an enzyme often causes strain, thus promoting transition state formation the transition state conformation of an enzyme catalyzed reaction is identical to the conformation seen in the uncatalyzed transition state formation of the transition state always assures that the reaction will proceed to product none of the above are true
All of the following are characteristics of the active site of an enzyme EXCEPT? Select the correct response. It has a complementary shape to its substrate. It is the binding site for many different kinds of molecules. It is found somewhere in the interior of the enzyme. It has less water content compared to the cytoplasm.
Which of the following is NOT true about enzymes? Enzyme inhibitors interact reversibly or irreversibly with an enzyme to alter its Km and /or Vmax values. Enzymes typically act under milder conditions of temperature and pH than non-enzyme chemical catalysts. Zymogens are the inactive precursors of enzyme. Nucleophilic groups can catalyze reactions through the transient formation of covalent bonds with the substrate. Transition state stabilization can significantly increase the activation energy for a reaction.
Identify the type of enzyme inhibition each of the following inhibitor characteristics is associated with: 1. An inhibitor that decreases enzyme activity by binding to a site on the enzyme other that the active site. 2. An inhibitor that inactivates enzymes by forming a strong covalent bond of the enzyme acitve site.
The place on the enzyme where the substrate binds is called the: a) coenzyme b) transition state c) active site d) enzyme-substrate complex The enzyme-bound substrate is also called: a) coenzyme b) transition state c) active site d) enzyme-substrate complex The enzyme-bound substrate facilitates the formation of the: a) coenzyme b) transition state c) active site d) enzyme-substrate complex The binding of substrates to most enzymes may be best described as: a) lock and key b) induced fit c) backside attachment d) cofactor displacement
Which of the following describe what enzymes such as Chymotrysin accomplish to allow products to form and be released by the enzyme active site? Group of answer choices catalyze chemical eactions that are thermodynamically unfavorable to occur establish a more stable transition state at a higher energy level to perform a catalysis reaction redce the chemical energy held within a chemical bond modify chemical structure of a substrate to "fit" within the active site
"An enzyme reaches a maximum rate at high substrate concentration because it has a fixed number of active sites where substrate binds", is true or false.
Coenzymes function to: change the shape of enzymes, allowing different additional substrates to bind. denature the enzyme, stopping the chemical reaction from occurring. interact directly with enzymes, either enabling the reaction to occur or making the substrate-enzyme interaction more efficient. dilate blood vessels, allowing more blood to flow, allowing more substrate to reach enzymes. absorb excess hydrogen and hydroxide ions, keeping the pH relatively stable, so that reactions can occur most efficiently.