Biology: Concepts and Investigations
5th Edition
ISBN: 9781260259049
Author: Hoefnagels
Publisher: MCG
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Textbook Question
Chapter 4, Problem 3MCQ
How does an enzyme affect the energy of a reaction?
a. The activation energy is lowered.
b. The net energy released is lowered.
c. The energy of the reactants is raised.
d. The energy of the products is raised.
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Students have asked these similar questions
What is the active site of an enzyme?
A. Specific molecule that acts as the reactant in an enzyme-mediated reaction
B. An ion or nonprotein organic molecule that associates with an enzyme and is necessary for its function
C. The part of an enzyme where substrates bind and a reaction occurs
D. A specific ion or molecule that binds to an enzyme to enhance or inhibit its activity
How does an enzyme affect a chemical reaction? Select all that apply.
A. Lowers the activation energy
B. Decreases the rate of the reaction
C. Increases the activation energy
D. Increases the rate of the reaction
Enzymes speed up a reaction by:
Select one:
a. Decreasing the amount of
activation energy needed to drive the
reaction
b. Change the amount of energy of
the reactant
c. Increasing the amount of activation
energy needed to drive the reaction
d. Change the amount of energy of
the products
Chapter 4 Solutions
Biology: Concepts and Investigations
Ch. 4.1 - What are some examples of the work of a cell?Ch. 4.1 - Prob. 2MCCh. 4.1 - Prob. 3MCCh. 4.1 - Prob. 4MCCh. 4.2 - What is metabolism on a cellular level?Ch. 4.2 - Prob. 2MCCh. 4.2 - Prob. 3MCCh. 4.3 - What are the main parts of an ATP molecule?Ch. 4.3 - Prob. 2MCCh. 4.3 - Describe the relationships among endergonic...
Ch. 4.4 - Prob. 1MCCh. 4.4 - Prob. 2MCCh. 4.4 - Prob. 3MCCh. 4.4 - Prob. 4MCCh. 4.4 - List three conditions that influence enzyme...Ch. 4.5 - What is diffusion?Ch. 4.5 - What types of substances diffuse freely across a...Ch. 4.5 - Prob. 3MCCh. 4.5 - Prob. 4MCCh. 4.5 - Prob. 5MCCh. 4.5 - Prob. 6MCCh. 4.6 - How does a knifefish adjust its electric field?Ch. 4.6 - Prob. 2MCCh. 4 - Prob. 1MCQCh. 4 - Building proteins _____ energy; ATP hydrolysis...Ch. 4 - How does an enzyme affect the energy of a...Ch. 4 - Prob. 4MCQCh. 4 - Prob. 5MCQCh. 4 - Some people claim that lifes high degree of...Ch. 4 - List some examples of endergonic and exergonic...Ch. 4 - Why do electron transport chains release energy?Ch. 4 - Provide an example of an appliance that uses...Ch. 4 - Name at least four ways that a cell uses ATP.Ch. 4 - Use what you know about enzymes to propose an...Ch. 4 - Prob. 7WIOCh. 4 - Prob. 8WIOCh. 4 - Prob. 9WIOCh. 4 - Liver cells are packed with glucose. If the...Ch. 4 - Prob. 1PITCh. 4 - Prob. 2PITCh. 4 - Prob. 3PIT
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Substance A is converted to substance B in a metabolic reaction. Which statement best describes the role of enzyme during this reaction? A. It dissolves substance A in the reaction medium. B. It speeds up the reaction without it being consumed in the process. C. It provides energy to the reaction system D. It adjusts the pH of the reaction medium.arrow_forwardWhat is the definition of a catabolic metabolic pathway? A. A pathway that releases energy and releases matter B. A pathway that stores energy and releases matter C. A pathway that releases energy and stores matter D. A pathway that stores energy and stores matterarrow_forwardWhat distinguishes a linear metabolic pathway from a cyclic metabolic pathway? A. The last step of the pathway regenerates a reactant for the first step. B. The product inhibits an enzyme in the pathway, slowing or stopping the metabolic pathway. C. A linear pathway runs straight in one direction from reactant to product. D. Enzymes convert reactants into intermediates before separate enzymes convert intermediates into products.arrow_forward
- The substrate of an enzyme is? A. an organic accessory molecule B. The molecole(s) released at the end of an enzyme-facilitated reaction. C. The shape of the enzyme D. One of the amino acids that makes up the enzyme E. What the enzyme acts on.arrow_forwardwhat is the first step in an enzyme-catalyzed reaction? a. formation of enzyme-substrate complex b. ionization of enzyme c. dimerizing the substance d. catalysis of enzymearrow_forwardWhen an enzymatic reaction is in progress, do you expect to see happen to the amount of product? A It will increase as the reaction proceeds. B It will decrease as the reaction proceeds. C The amount will not change as reaction proceeds. D It is not possible to predict what will happen to it as the reaction proceeds.arrow_forward
- Enzymes: A. increase the amount of energy released during a reaction. B. decrease the amount of energy required for a reaction. C. increase the amount of energy required for a reaction. D. decrease the amount of energy released during a reaction.arrow_forwardHow does a non-competitive inhibitor decrease the rate of an enzyme reaction? O A. by binding at the active site of the enzyme B. by changing the shape of the active site on the enzyme, without binding to active site O C. by changing the free energy change of the reaction D. by acting as a coenzyme for the reactionarrow_forwardWhich statement defines a coenzyme? a. An enzyme precursor b. A unit consisting of an enzyme bound to reactants plus ATP c. An inactive enzyme that becomes functional upon contact with specific cofactors d. The active part of an enzyme e. An organic molecule closely associated with enzymesarrow_forward
- Which of these statements about enzymes is true? a,Most proteins are enzymes. b.Most enzymes are proteins. c.Enzymes are changed by the reactions they catalyze. d.The active sites of enzymes have little specificity for substrates.arrow_forwardIn a highly high-temperature environment, you placed an enzyme and some substrates. You've seen that there hasn't been any reaction. Applying what you have learned on enzyme activity, how would you explain what occurred? A. The enzyme was not placed at a pH level that would allow it to react at its maximum rate. B. There are not enough enzymes for the reaction to occur. C. The enzyme may have denatured or broken down due to the high temperature of the environment, resulting in no reaction. D. There are not enough substrates for reaction to occur. Substrate concentration affects enzyme activity. Determine what would occur when there are too many substrates and fewer enzymes? A. No enzyme activity would occur. B. The reaction rate would continuously increase. C. The reaction would speed up tremendously. D. Maximal rate of reaction would occur. Enzyme activity mainly involves the active site and the substrate. How would you compare the active site from the substrate? A. The substrate…arrow_forwardINSTRUCTIONS - Answer the following multiple-choice questions and EXPLAIN in 3-5 sentences why you chose that answer. Answer properly -arrow_forward
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