WHAT IS LIFE? A GUIDE TO BIO 3E+LAUNCHPA
3rd Edition
ISBN: 9781319103316
Author: PHELAN
Publisher: Macmillan Higher Education
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Chapter 2, Problem 17MC
Summary Introduction
Introduction:
Enzymes are proteins that catalyze biochemical reactions in cells.
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Which of the following is true about enzymes.
a) Enzymes are catalysts and they increase the rate of a reaction while they are not altered by the reaction.
b) Enzymes are proteins that can be denatured by changes in pH or temperature.
c) Enzymes are highly specific for the substrates they react with and catalyze only one or a limited set of possible reactions with those substrates.
d) All of these are true about enzymes
e) None of these are true about enzymes
Which of the following statements about enzymes are true? Choose all that apply.
Group of answer choices:
a) Enzymes are nonspecific
b) Enzymes speed up the rates of chemical reactions
c) Enzymes require a lot of energy to synthesize
d) Enzymes are not important in biological systems
E) Reactants in enzyme-catalyzed reactions are called substrates
F) Enzymes lower the activation energy of reaction
G) Enzymes change ∆G of reactions
H) One enzyme usually catalyzes many types of reactions
I answered for letters , B, E, anf F, and got a 1.5 out of 2, so I am missing one.
Thank You!
Which of the following statement regarding enzymes is false?
a.) they speed up reaction rates
b.) they work within narrow temperature and pH ranges
c.) The active site binds the substarate
d.) They are consumed in the reactions they catalyze
Chapter 2 Solutions
WHAT IS LIFE? A GUIDE TO BIO 3E+LAUNCHPA
Ch. 2 - Prob. 1SACh. 2 - Prob. 2SACh. 2 - Prob. 3SACh. 2 - Prob. 4SACh. 2 - Prob. 5SACh. 2 - Prob. 6SACh. 2 - Prob. 7SACh. 2 - Prob. 8SACh. 2 - Prob. 9SACh. 2 - Prob. 10SA
Ch. 2 - Prob. 11SACh. 2 - Prob. 12SACh. 2 - Prob. 13SACh. 2 - Prob. 14SACh. 2 - Prob. 15SACh. 2 - Prob. 16SACh. 2 - Prob. 17SACh. 2 - Prob. 18SACh. 2 - Prob. 19SACh. 2 - Prob. 20SACh. 2 - Prob. 1MCCh. 2 - Prob. 2MCCh. 2 - Prob. 3MCCh. 2 - Prob. 4MCCh. 2 - Prob. 5MCCh. 2 - Prob. 6MCCh. 2 - Prob. 7MCCh. 2 - Prob. 8MCCh. 2 - Prob. 9MCCh. 2 - Prob. 10MCCh. 2 - Prob. 11MCCh. 2 - Prob. 12MCCh. 2 - Prob. 13MCCh. 2 - Prob. 14MCCh. 2 - Prob. 15MCCh. 2 - Prob. 16MCCh. 2 - Prob. 17MCCh. 2 - Prob. 18MCCh. 2 - Prob. 19MC
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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_forward1) Answer the following questions about a Vegetarian diet: a) List Pros and Cons of being on the diet. b) List any possible misconceptions that may have been verified or nullified by scientific articles for this diet. c) What biochemical pathway would this diet target?arrow_forwardYou are studying a metabolic pathway and are trying to decide if it is an anabolic pathway or a catabolic pathway. Which of the following would help diagnose this problem? A) Look for common intermediates. B) Look for ATP-requiring steps. C) Look for enzymes under allosteric regulation. OD) All of the above. OE) None of the above.arrow_forward
- Enzymes work by... OA) Altering the equilibrium position of a reaction B) Altering the DG value for a reaction C) Increasing the activation energy for a reaction D) Preventing degradation of the product E) Promoting the formation of the transition statearrow_forwardAlthough all of these play a part, the most important factor which drives protein folding is: a) hydrogen bond formation b) salt bridge formation c) ion-dipole interactions d) the hydrophobic effect The active site of an enzyme binds which type of molecule? a) allosteric activator b) coenzyme c) substrate d) product A coenzyme is also considered to be a prosthetic group if it: a) assists in enzyme catalysis b) binds to the active site c) acts as an allosteric inhibitor d) is covalently bound to the enzyme Proteases catalyze the cleavage of proteins into smaller peptides and amino acids by reaction with water. Proteases fall into the broader class of: a) transferases b) lyases c) hydrolases d) oxidoreductases 13. The Michaelis - Menten constant Km represents: a) 1/2 Vmax b) the substrate concentration at 1/2 Vmax c) 1/2 the substrate concentration at Vmax d) the minimum amount of substrate needed to initiate the reaction Enzymes alter which of these…arrow_forwardIndicate which enzyme works on each molecule.a) Amylose b) Hydrogen peroxide c) DNAarrow_forward
- 1. ATP is a good source of energy for the cell because a) it is versatile-able to be used in many types of reactions b) its breakdown is easily coupled with energy–requiring reactions c) it provides just the right amount of energy for cellular reactions d) all of these are correct 2. Which of the following is an example of potential energy? a) gasoline in the tank of an automobile b) the engine of an auto running c) a skier moving downhill d) pushing a desk across a room 3. The conditions for alcoholic or lactic acid fermentation: a) are the same as those for cellular respiration b) result in the production of more ATP than cellular respiration c) include the requirement of both carbon dioxide and oxygen d) produce less ATP than cellular respiration 4. Which of the following statements is TRUE? a) according to chemisomotic theory, concentration gradients drive the formation of ATP b) an electron loses energy each time it is transferred down the ETC c) there is a buildup of H+…arrow_forwarda) What is the Steady State assumption; how does steady state differ from equilibrium? b) Transition state; what are two ways that enzymes can decrease the transition state energy?arrow_forwardWhich of the following statements is true concerning thermodynamics of reactions within a cell? a) Spontaneous reactions always consume energy b) Unfavorable reactions can be coupled to nonspontaneous reactions c) Compartmentalization can be used to drive up the concentration of substrates to force a reaction to occur d) All important reactions are spontaneousarrow_forward
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