Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Textbook Question
Chapter 2, Problem 5TYK
Radioactive isotopes can be used in studies of metabolic pathways because
- a. their half-lives allow a researcher to time an experiment.
- b. they are more reactive.
- c. the cell does not recognize the extra protons in the nucleus, so isotopes are readily used in
metabolism . - d. their location or quantity can be experimentally determined because of their radioactivity.
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How could you use the diversity of metabolic pathways that produce the same or similar products to critique this argument?
Rank the steps from first to last.
a. New enzymes cause modification of the pathway in an advantageous way. b. The biochemical pathway is gradually modified. c. A pathway exists and accomplishes some functions. d. An organism with cellular enzymes has mutations that allow new enzymes to arise.
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 2 Solutions
Study Guide for Campbell Biology
Ch. 2 - Fill in the names beside the symbols of the...Ch. 2 - The difference between the mass number and the...Ch. 2 - To move to a shell farther from the nucleus, an...Ch. 2 - Prob. 4IQCh. 2 - Fill in the blanks in the following concept map to...Ch. 2 - Prob. 6IQCh. 2 - Prob. 7IQCh. 2 - Prob. 8IQCh. 2 - Draw the structural formula of a water molecule,...Ch. 2 - Look at your sketch of a water molecule in...
Ch. 2 - Prob. 11IQCh. 2 - Prob. 1SYKCh. 2 - Atoms can have various numbers associated with...Ch. 2 - Prob. 3SYKCh. 2 - Prob. 1TYKCh. 2 - Prob. 2TYKCh. 2 - Prob. 3TYKCh. 2 - Prob. 4TYKCh. 2 - Radioactive isotopes can be used in studies of...Ch. 2 - Prob. 6TYKCh. 2 - Prob. 7TYKCh. 2 - Prob. 8TYKCh. 2 - Prob. 9TYKCh. 2 - Prob. 10TYKCh. 2 - Prob. 11TYKCh. 2 - Prob. 12TYKCh. 2 - Prob. 13TYKCh. 2 - Prob. 14TYKCh. 2 - Prob. 15TYKCh. 2 - A covalent bond between two atoms is likely to be...Ch. 2 - Prob. 17TYKCh. 2 - Prob. 18TYKCh. 2 - For questions 19-21, choose from the following...Ch. 2 - Prob. 20TYKCh. 2 - Prob. 21TYKCh. 2 - Prob. 22TYKCh. 2 - Prob. 23TYKCh. 2 - Prob. 24TYKCh. 2 - Prob. 25TYKCh. 2 - What is the difference between a molecule and a...Ch. 2 - Prob. 27TYKCh. 2 - Prob. 28TYK
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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.arrow_forwardThe probabiliy of a particular reaction occurring in a cell can be increased by A) having reactants contained within an organelle B) having reactants contained within an organelle with the necessary enzymes C) having low concentrations of the reactants D) having reactants with enthalphy with high enthalpy product(s)arrow_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
- When 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________ 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 inhibitionarrow_forwardWhat 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 inhibitionarrow_forward
- Endergonic reactions do which of the following? Select all that apply. A. Are nonspontaneous B. Consume energy C. Are spontaneous D. Release energyarrow_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_forwardWhen electromagnetic energy is absorbed, it can be converted to which of the following? Group of answer choices a) Chemical energy as in photosynthesis. b) Electrical energy as with solar collectors c) Sensible heat d) All of the above e. None of the abovearrow_forward
- What is the difference between cellular respiration and fermentation? Select an answer. a) cellular respiration does not need oxygen, while fermentation needs oxygen b) cellular respiration needs oxygen, while fermentation does not need oxygen c) cellular respiration produces very little energy, while fermentation produces a lot of energy d) Almost all cells carry out fermentation, while few carry out cellular respirationarrow_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_forwardCells are able to extract energy from glucose during cellular respiration. Which of the following contributes to the release of energy? Answer can be multiple a Creating energy by breaking C-H and C-C bonds. b Breaking high energy bonds to release their energy. c Replacing glucose's high energy bonds with new low energy bonds. d The formation of strong C-O and O-H bonds.arrow_forward
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