Concepts of Biology
1st Edition
ISBN: 9781938168116
Author: Samantha Fowler, Rebecca Roush, James Wise
Publisher: OpenStax College
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Textbook Question
Chapter 4, Problem 5RQ
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
d. Each one is specific to the particular substrate(s) to which it binds.
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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 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.
Which of the following statements concerning enzymes is TRUE?
a.
Enzymes can increase the equilibrium constant of a reaction by 1000-fold.
b.
The activity of many enzymes can be regulated.
c.
Many enzymes are consumed in the reactions they catalyze.
d.
The rate of enzymatic catalysis is independent of pH.
Chapter 4 Solutions
Concepts of Biology
Ch. 4 - Figure 4.6 Look at each of the processes shown and...Ch. 4 - Figure 4.15 Cyanide inhibits cytochrome c oxidase,...Ch. 4 - Figure 4.16 Tremetol, a metabolic poison found in...Ch. 4 - Which of the following is not an example of an...Ch. 4 - Which of the following is not true about enzymes?...Ch. 4 - Energy is stored long-term in the bonds of _____...Ch. 4 - The energy currency used by cells is _____. a. ATP...Ch. 4 - The glucose that enters the glycolysis pathway is...Ch. 4 - What do the electrons added to NAD do? a. They...Ch. 4 - Chemiosmosis involves a. the movement of electrons...
Ch. 4 - Which of the following fermentation methods can...Ch. 4 - The cholesterol synthesized by cells uses which...Ch. 4 - Beta oxidation is ______. a. the breakdown of...Ch. 4 - Does physical exercise to increase muscle mass...Ch. 4 - Explain in your own terms the difference between a...Ch. 4 - With regard to enzymes, why are vitamins and...Ch. 4 - Both prokaryotic and eukaryotic organisms carry...Ch. 4 - We inhale oxygen when we breathe and exhale carbon...Ch. 4 - When muscle cells run out of oxygen, what happens...Ch. 4 - Would you describe metabolic pathways as...
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- 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 is true of all enzymes? A They are soluble in water. B They have a quaternary structure. They have only one active site. D They catalyse anabolic reactions. Carrow_forwardWhich 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_forward
- Which 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_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 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_forward
- Which of the following is NOT true of enzymes? A. Made of protein B. Made of carbohydrates. C. React with a substrate D. Are not altered with reactions.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_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_forward
- INSTRUCTIONS - Answer the following multiple-choice questions and EXPLAIN in 3-5 sentences why you chose that answer. Answer properly -arrow_forwardEnzymes speed up a reaction by: Select one: a. Decreasing the amount of activation energy needed to drive the reaction b. Change the amount of energy of the reactant c. Increasing the amount of activation energy needed to drive the reaction d. Change the amount of energy of the productsarrow_forwardWhich of the following is a primary function of the active site of an enzyme? a. It binds allosteric regulators of the enzyme. b. It binds noncompetitive inhibitors of the enzyme. c. It catalyzes the reaction associated with the enzyme. d. It is activated by the presence of the end product of the metabolic pathway in which the enzyme is involved. Clear my choice Question 2 Not yet answered Points out of 2.00 Flag question Question text Which of the following statement about the mass spectrometry is true? a. Large amount of protein sample is needed for mass spectrum, and thus it is very expensive. b. It is a powerful method to determine the 3-dimensional structure of proteins. c. It can be sued for protein location in a living cell. d. It can be used to measure the molecular weight of proteins. e. It can be used to determine the stability of a protein structure in solution. Clear my choice…arrow_forward
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