BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Textbook Question
Chapter 6, Problem 2U
During a
a. reduced and now has a higher energy level.
b. oxidized and now has a lower energy level.
c. reduced and now has a lower energy level.
d. oxidized and now has a higher energy level.
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Endergonic reactions do which of the following? Select all that apply.
A. Are nonspontaneous
B. Consume energy
C. Are spontaneous
D. Release energy
Enzymes catalyze a chemical reaction by
A. decreasing the amount of ATP required to activate a reaction
B. increasing the amount of ATP required to activate a reaction
C. slowing down the reaction to obtain more products
D. increasing the reaction to obtain more products
E. decreasing the amount of ATP required and obtaining more products.
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.
Chapter 6 Solutions
BIOLOGY
Ch. 6.1 - Prob. 1LOCh. 6.1 - Prob. 2LOCh. 6.1 - Describe the nature of redox reactions.Ch. 6.2 - Explain the laws of thermodynamics.Ch. 6.2 - Prob. 2LOCh. 6.2 - Contrast the course of a reaction with and without...Ch. 6.3 - Describe the role of ATP in short-term energy...Ch. 6.3 - Prob. 2LOCh. 6.4 - Discuss the specificity of enzymes.Ch. 6.4 - Explain how enzymes bind to their substrates.
Ch. 6.4 - Prob. 3LOCh. 6.5 - Prob. 1LOCh. 6.5 - Prob. 2LOCh. 6.5 - Prob. 3LOCh. 6 - Prob. 1DACh. 6 - A covalent bond between two atoms represents what...Ch. 6 - During a redox reaction the molecule that gains an...Ch. 6 - Prob. 3UCh. 6 - A spontaneous reaction is one in which a. the...Ch. 6 - Prob. 5UCh. 6 - Which of the following is NOT a properly of a...Ch. 6 - Where is the energy stored in a molecule of ATP?...Ch. 6 - Prob. 1ACh. 6 - Which of the following statements is NOT true...Ch. 6 - Prob. 3ACh. 6 - Prob. 4ACh. 6 - Enzymes have similar responses to both changes in...Ch. 6 - Prob. 6ACh. 6 - Examine the graph showing the rate of reaction...Ch. 6 - Phosphofructokinase functions to add a phosphate...
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- Which 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 the following is not an example of an energy transformation? a. Heating up dinner in a microwave b. Solar panels a work c. Formation of static electricity d. None of the abovearrow_forwardEnzymes (a) speed up reactions that would otherwise occur much more slowly. (b) spur reactions that would otherwise never occur. (c) provide energy for anabolic but not catabolic pathways. (d) are consumed during the reactions they catalyze.arrow_forward
- A reducing chemical reaction ________. a. removes a hydrogen atom from the substrate b. adds an electron to the substrate c. reduces the compound to a simpler formarrow_forwardWhen an enzymatic reaction is in progress, do you expect to see happen to the amount of substrate? 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_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 are organic catalysts that (a) alter the direction in which a chemical reaction proceeds, (b) determine the nature of the products of a reaction, (c) increase the speed of a chemical reaction, (d) are essential raw materials for a chemical reaction that are converted into some of its products.arrow_forwardWhat law of chemistry determines how much energy can be transferred when it is converted from one form to another? a. the first law of thermodynamics b. the second law of thermodynamics c. the conservation of matter d. the conservation of energyarrow_forwardthe energy released by ___ reactions is used to run ________ reactions A. ENDERGONIC; ENDERGONIC B. EXERGONIC; ENDERGONIC C. EXERGONIC; EXERGONIC D. ENDERGONIC; EXERGONICarrow_forward
- enzymes are efficient catalysts because they can do which of the following? A) catalyze reactions that ottherwise would not occur. B) decrease the free energy of activation of reactions, C) decrease the standard free energy change o reactions , D) prevent the conversion of product to substrate, E) shift the equilibrium of reactions toward more complete inversion of productarrow_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_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_forward
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