Microbiology Fundamentals: A Clinical Approach
3rd Edition
ISBN: 9781259709227
Author: Marjorie Kelly Cowan Professor, Heidi Smith
Publisher: McGraw-Hill Education
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Chapter 7, Problem 19Q
Summary Introduction
Introduction:
Enzymes are the cellular macromolecules which play a crucial role in the completion of cellular
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Which of the following is not true about enzymes?a. They are consumed by the reactions they catalyze.b. They are usually made of amino acids.c. They lower the activation energy of chemical reactions.d. Each one is specific to the particular substrate(s) to which it binds.
Which of the following is NOT true of enzymes?
a) They may interact chemically with their substrates
b) They may catalyze a reaction in both forward and reverse directions.
c) They may alter Keq for the reaction that they catalyze.
d) They may decrease the entropy of their substrates.
Which of the following is not true about enzymes: a. They increase ΔG of reactions. b. They are usually made of amino acids. c. They lower the activation energy of chemical reactions. d. Each one is specific to the particular substrate(s) to which it binds.
Chapter 7 Solutions
Microbiology Fundamentals: A Clinical Approach
Ch. 7.1 - Describe the relationship among metabolism,...Ch. 7.1 - Fully describe the structure and function of...Ch. 7.1 - Differentiate between constitutive and regulated...Ch. 7.1 - Diagram four major patterns of metabolic pathways.Ch. 7.1 - Describe how enzymes are controlled.Ch. 7.1 - NCLEX PREP 2. An enzyme that catalyzes starch is...Ch. 7.2 - Name the chemical in which energy is stored in...Ch. 7.2 - Create a general diagram of a redox reaction.Ch. 7.2 - Identify electron carriers used by cells.Ch. 7.2 - Prob. 3NP
Ch. 7.3 - Name the three main catabolic pathways and the...Ch. 7.3 - Construct a paragraph summarizing glycolysis.Ch. 7.3 - Describe the Krebs cycle, with emphasis on what...Ch. 7.3 - Discuss the significance of the electron transport...Ch. 7.3 - State two ways in which anaerobic respiration...Ch. 7.3 - Summarize the steps of microbial fermentation, and...Ch. 7.3 - Describe how noncarbohydrate compounds are...Ch. 7.3 - Q. From this information, can you identify another...Ch. 7.4 - Prob. 16AYPCh. 7.4 - Define amphibolism.Ch. 7.4 - Prob. 2MMCh. 7 - NCLEX PREP 1. Which of the following is/are...Ch. 7 - Prob. 1QCh. 7 - Prob. 2QCh. 7 - Prob. 3QCh. 7 - Prob. 4QCh. 7 - Prob. 5QCh. 7 - Prob. 6QCh. 7 - Prob. 7QCh. 7 - Prob. 8QCh. 7 - Prob. 9QCh. 7 - Prob. 10QCh. 7 - Prob. 11QCh. 7 - Prob. 12QCh. 7 - Prob. 13QCh. 7 - Prob. 14QCh. 7 - Prob. 15QCh. 7 - Prob. 16QCh. 7 - Defend this statement: Microbes (and their...Ch. 7 - Prob. 18QCh. 7 - Prob. 19QCh. 7 - Prob. 20QCh. 7 - Polymerase chain reaction (PCR) is a lab...Ch. 7 - From chapter 3, figure 3.15. On these depictions...
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- Which of the following describes a reaction that requires substrate 1 to bind the the enzyme, then substrate 2 binds, and then the products are produced? A. No ternary complex B. Ordered ternary complex C. Ping-Pong D. Random ternary complexarrow_forwardWhich of the following accurately describes how an enzyme functions? a. reduces the energy content of the products b. allows for the exothermic reaction of materials that are usually endothermic c. changes the reaction mechanism effectively reducing the activation energy d. shifts the equilibrium for the reactionarrow_forwardWhich of the following best describes the relationship between an enzyme and a substrate a. stable b. causes permanent alteration to the enzyme c. results from non-complimentary bonding d. are complimentaryarrow_forward
- Which of the following statements is not true about enzymes?* A. Enzymes are biological catalysts B. Enzymes as catalysts lowers the activation energy thus, speeds up the rate of reaction C. Enzymes are proteins D. Enzymes are highly specific E. None of the given optionsarrow_forwardWhich of the following statement regarding enzymes is false? a.) they speed up reaction rates b.) they work within narrow temperature and pH ranges c.) The active site binds the substarate d.) They are consumed in the reactions they catalyzearrow_forwardWhich of the following choices BEST describes metabolism? a. breakdown of biomolecules b. controlled by enzymes and involved ATP c. all of the choices are correct d. synthesis of biomoleculesarrow_forward
- In 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_forwardWhat roles do enzymes play in nature? Group of answer choices A.They have a role in metabolic reactions B. They increase rates of reaction but do not shift the equilibrium formed between products and reactants C. They catalyze cellular processes D. All of the abovearrow_forwardWhy is an enzyme considered "specific"? A. Only one type of enzyme is found in our bodies B. Only certain enzymes can pass through the cell membrane C. Its active site must match the substrate to do its job D. The enzyme can only move from high to low concentrationarrow_forward
- Which of the following statements regarding enzymes is true? A. Enzymes decrease the free energy change of a reaction. B. Enzymes cjange the direction of chemical reaction. C. Enzymes prevent changes in substrate concentrations. D. Enzymes increase the rate of a reaction. E. Enzymes are permanently altered by the reactions they catalyze.arrow_forwardWhich statement is true regarding the function of a catalyst in a chemical reaction? a) A catalyst increases the rate of a reaction. b) A catalyst provides an alternate mechanism for the reaction. c) A catalyst is not consumed by the reaction. d) All of the above are true.arrow_forwardWhich 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_forward
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