EP BIOLOGY TODAY+TOMORROW W/O PHYSIO.
5th Edition
ISBN: 9781305583856
Author: STARR
Publisher: CENGAGE L
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Chapter 4, Problem 6SQ
Summary Introduction
Introduction: An enzyme is a substance that acts as a macromolecular biological catalyst in living things. It is made up of proteins that folded into complex forms and found throughout the body. The reaction is speed by the enzymes by reducing activation energy. Thus, it drops the barrier that avoids the occurrence of reactions.
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Students have asked these similar questions
The active site of an enzymea. is identical in structure for all enzymes.b. is the part of the enzyme where its substrate can fit.c. can be used only once.d. is not affected by environmental factors, such as pH and temperature.
________ is a regulatory mechanism in which the end product of a metabolic pathway inhibits an enzyme that catalyzes an early step in the pathway.
a.
Cooperative inhibition
b.
Feedback inhibition
c.
Allosteric inhibition
d.
Non-competitive inhibition
e.
Metabolic inhibition
What is it called when the final product of an enzymatic pathway acts as a modulator for the first enzyme in the pathway?
a. isoenzyme activation
b. relative specificity
c. feed back inhibition
d. competitive inhibition
Chapter 4 Solutions
EP BIOLOGY TODAY+TOMORROW W/O PHYSIO.
Ch. 4 - Figure 4.5 Energy inputs and outputs in chemical...Ch. 4 - Figure 4.10 Enzymes, temperature, and pH. Each...Ch. 4 - Prob. 3FIOCh. 4 - Prob. 4FIOCh. 4 - The genus Ferroplasma consists of a few species of...Ch. 4 - Prob. 2DIDCh. 4 - Prob. 3DIDCh. 4 - Prob. 1SQCh. 4 - Prob. 2SQCh. 4 - Prob. 3SQ
Ch. 4 - Prob. 4SQCh. 4 - Prob. 5SQCh. 4 - Prob. 6SQCh. 4 - Prob. 7SQCh. 4 - Prob. 8SQCh. 4 - Ions or molecules tend to diffuse from a region...Ch. 4 - Prob. 10SQCh. 4 - Prob. 11SQCh. 4 - Prob. 12SQCh. 4 - A transport protein requires ATP to pump sodium...Ch. 4 - Prob. 14SQCh. 4 - Prob. 15SQCh. 4 - Prob. 1CTCh. 4 - Water molecules tend to diffuse in response to...Ch. 4 - Dixie Bee wanted to make JELL-O shots for her next...Ch. 4 - The enzyme trypsin is sold as a dietary enzyme...Ch. 4 - Prob. 5CT
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- 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_forwardEnzymes are typically specific to ________. a. one substrate b. any substrate they encounter c. a handful of substratesarrow_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_forward
- 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.arrow_forwardThe lock-and-key theory described the action of ______. Select one: a. enzymes as locks that fit other enzymes b. substrates as locks that fit different enzymes c. enzymes as keys that fit different chemicals d. substrates as keys that fit different enzymesarrow_forwardAn enzymea. becomes part of the final products.b. is nonspecific for substrate.c. is consumed by the reaction.d. is heat and pH labile.arrow_forward
- 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.arrow_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_forwardWhich 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.arrow_forward
- Which of these is not true about enzymes? A. Most of them are proteins B. Are changed at the end of the reaction C. Can only speed up the rate of the reaction D. Very specific in function E. Work better in specific mediumarrow_forwardThe following statement can be said about enzymes: A. lowers activation energy of reactions B. regulates chemical activities in the body C. 3D shape is essential for normal function D. all of these E. B and C onlyarrow_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
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