Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 2, Problem 6TY
Summary Introduction
Introduction: The
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All chemical reactions are theoretically reversible. However, many biological reactions are irreversible. Which factor(s) contribute to the irreversibility of biological reactions?
a. high energy requirementsb. product removalc. state of chemical equilibriumd. a and be. a, b, and c
A chemical reaction is more likely to occur spontaneously if
A. the products of the reaction are more complex than the reactants.
B. the system takes up heat from its surroundings.
C. the products of the reaction are more disordered than the reactants.
D. the system gains free energy.
Chemical reactions that take place in living systems include
A. Neutralization reaction
B. Condensation reaction
C. Hydrolysis reaction
D. All the above
Chapter 2 Solutions
Biology
Ch. 2.1 - Before the experiment conducted by Ernest...Ch. 2.1 - What was the hypothesis tested by Rutherford?Ch. 2.1 - Prob. 3EQCh. 2.1 - Explain the difference between an electron shell...Ch. 2.2 - Core Skill: Modeling The goal of this modeling...Ch. 2.2 - Prob. 1CCCh. 2.3 - When oil dissolves in a soapy solution, where is...Ch. 2.4 - Core Skill: Connections Look ahead to Figure...Ch. 2 - _______________ make(s) up the nucleus of an atom....Ch. 2 - Prob. 2TY
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- Which of these statements concerning enzymes is correct?a. Enzymes increase the rate of reactions but are permanentlychanged as a result.b. Enzymes are proteins that function as catalysts.c. Enzymes increase the activation energy requirement for a reactionto occur.d. Enzymes usually can only double the rate of a chemicalreaction.e. Enzymes increase the kinetic energy of the reactants.arrow_forwardA substance that has weight and occupies space is calleda. kinetic energy.b. a catalyst.c. matter.d. potential energy.arrow_forwardSome exergonic chemical reactions that proceed slowly in the outside world proceed quickly in the human body. This is primarily because Select one: a. Body temperature is higher than outside temperature. b. Humans have enzymes that lower the activation energy of a chemical reaction. c. Humans have enzymes that increase the amount of energy released by a chemical reaction. d. All of the abovearrow_forward
- Which of these statements concerning enzymes is correct? a. Enzymes increase the rate of reactions but are permanently changed as a result. b. Enzymes are proteins that function as catalysts. c. Enzymes increase the activation energy requirement for a reaction to occur. d. Enzymes usually can only double the rate of a chemical reaction. e. Enzymes increase the kinetic energy of the reactants.arrow_forwardWhich 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 of the following statements are correct about how enzymes accelerate chemical reactions (select all that apply)? A. Enzymes bind substrates to raise their effective concentration B. Enzymes enhance the rate of a chemical reaction C. Enzymes catalyze chemical reactions by destabilizing transition states D. Side chains of protein provide reactive groups that facilitate reaction E. Enzymes shift the equilibrium of a chemical reaction to favor product formationarrow_forward
- proteins function to give structure to the body, regulate processes, provide protection, help muscles to contract,transport substances and serve as enzymes. As enzymes,proteins serves to: a.Lower the activation energy of biochemical reactions b.speed up biochemical reactions c.orient colliding molecules d.all of the above e.only two of the abovearrow_forwardWhich of the following statements is false? a. A reaction may not occur at a detectable rate even though it has a favorable equilibrium. b. After a reaction, the enzyme involved becomes available to catalyze the reaction again. c. For S → P, a catalyst shifts the reaction equilibrium to the right. d. Lowering the temperature of a reaction will lower the reaction rate. e. Substrate binds to an enzyme's active site.arrow_forwardWatera. is composed of two oxygen atoms and one hydrogen atom.b. has a low specific heat.c. is composed of polar molecules into which ionic substancesdissociate.d. is produced in a hydrolysis reaction.e. is a very small organic molecule.arrow_forward
- Which two of the following apply to the products of an exergonic reaction? A. Have less energy than the reactants B. Are less ordered than the reactants C. Are more ordered than the reactants D. Have more energy than the reactantsarrow_forwardA molecule that loses an electron to a free radicala. becomes more stable.b. becomes electrically neutral.c. becomes less reactive.d. is permanently destroyed.e. becomes a free radical itself.arrow_forwardAccording to the lock-and-key model of enzyme action,a. reactants must first be heated.b. enzyme shape is not important.c. each enzyme can catalyze many types of reactions.d. reactants must bind to an active site on the enzyme.e. enzymes control only a small number of reactions in the cell.arrow_forward
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