An enzyme that has lost its shape a. Is denatured and no longer functional. b. Is...
An enzyme that has lost its shape
a. Is denatured and no longer functional.
b. Is denatured but still functional.
c. Is not different from a regular enzyme because shape is not important.
d. Can be restored by extreme temperatures or pH swings.
Homework Answers
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An enzyme that has lost its shape
a. Is denatured and no longer functional.
b. Is...
D Each enzyme is specihic of and because its shape catalyzes on certain reactions. The chemical reactions taking place in a cell will most likely speed up if the 3. A genetic material stops re...
D Each enzyme is specihic of and because its shape catalyzes on certain reactions. The chemical reactions taking place in a cell will most likely speed up if the 3. A genetic material stops replicating. B the size of the cell increases. C the enzymes involved become inactive. D the concentration of the reactants is increased. 4. Enzymes A are able to heat up molecules so that they can react B provide CO2 for chemical reactions. C are biological catalysts....
that moves out the cell The sodium-potassium pump is an A. Enzyme ATP B. Enzyme, sodium...
that moves out the cell The sodium-potassium pump is an A. Enzyme ATP B. Enzyme, sodium C. Peripheral protein sodium D. Peripheral protein potassium E. All of the above reactions Activation energy is required for A. Anabolic B. Catabolic C. A&B D. None of the above In which environment would an organism benefit from having a high concentration of unsaturated lipids in the cell membrane? A. Extreme cold temperatures B. Extreme hot temperature C. Dry Conditions D. Wet conditions E....
Under what circumstances may the enzyme arginase in the liver change its shape and become inactive?...
Under what circumstances may the enzyme arginase in the liver change its shape and become inactive? Select the correct answer below: when the pH is 9.7 when the pH is around 7.4 when the pH is around 12.0 B and C
question 3: what happens to the structure of a protein when it is denatured? question 4:...
question 3: what happens to the structure of a protein when it is
denatured?
question 4: why is it important for a protein to be at a
certain ph to carry out its function
zymes in your textbook, especially the sections on enzym REPORT: Your report should include two separate files: a table of the data from your enzyme experiments online and conclusions consisting of answers to the questions. WARM-UP QUESTIONS: 1. What part of the name 6-O-a-L-ramnosyl-D-glucosidase shows that...
4. Noncompetitive inhibitors: a) bind to the active site b) bind to the enzyme-substrate complex c)...
4. Noncompetitive inhibitors: a) bind to the active site b) bind to the enzyme-substrate complex c) bind outside the active site and decrease substrate binding d) bind outside the active site and decrease rate of catalysis. 5. Which statement best describes the effect of pH upon enzyme catalyzed reactions? a) rate increases with increasing pH b) rate decreases with increasing pH c) rate increases with increasing pH until the denaturation pH is reached d) every enzyme has an optimum pH...
An enzyme works well as a catalyst at a pH of 6.8. The pk of an...
An enzyme works well as a catalyst at a pH of 6.8. The pk of an essential catalytic residue is known to be 7.2 It is found that catalytic activity is significantly lower when pH= 8.1. What is likely the cause of the decrease in activity? Select all that apply. Select one or more: a. Glu or Asp must lose a proton to inactivate the protein, b. The protein has changed shape due to a change in charge. c. His...
Which statement about acetylation is false? a. A protein may be acetylated at the N' terminus...
Which statement about acetylation is false? a. A protein may be acetylated at the N' terminus by acetyltransferase D. A protein may be acetylated on a lysine R group by an acetyltransferase C. Acetylation is not reversible. d. Acetylation may induce a conformation change in the protein. QUESTION 2 True/False: All proteins that are ubiquitinated are sent to the proteasome and degraded True False QUESTION 3 If a hydrolytic enzyme of the lysosome escapes and enters the cytosol, it will...
Enzymes are biological catalysts and Unction by A) increasing the free energy in a system. B)...
Enzymes are biological catalysts and Unction by A) increasing the free energy in a system. B) lowering the activation energy of a reaction. C) lowering entropy in a system. D) increasing the temperature near a reaction. E) altering the equilibrium of a reaction. Which of the following contributes to the specificity of enzymes? A) Each enzyme has a wide range of temperature and pH optimum B) Each enzyme has an active site that interacts with many C) Substrates themselves may...
11. Local conditions can affect the specificity of an enzyme for its substrate, and thus the...
11. Local conditions can affect the specificity of an enzyme for its substrate, and thus the enzyme's catalytic activity. Which of the following alterations would be least likely to affect an enzyme in this manner? a) Increased temperature b) Increased substrate concentration c) increased H concentration d) Increased pH e) none of the above True / False: (3 pts each) 12. The Gl tracts of carnivores are longer and more specialized than those of herbivores. 13. Micelles are formed when...
ICE Chapter 7 .) Match each Catalytic Mechanism or Enzyme Mediated Reaction to its description: a....
ICE Chapter 7 .) Match each Catalytic Mechanism or Enzyme Mediated Reaction to its description: a. Act as molecular switches by turning on/off cell signaling and gene expression Acid-Base Catalysis b. Isomerizations, condensations, and Covalent Catalysis dehydrations (hydrolysis) c Nucleophile group on the enzyme attacks an electrophile substrate, forming an enzyme- Metal lon Catalysis substrate intermediate d. Proton transfer involving water or a functional group Coenzyme Dependent Redox Reactions e. Include dehyd rogenases. Involves NAD /NADH, NADP*/NAD PH, FAD/FADH2, FMN/FMNH2...
D Each enzyme is specihic of and because its shape catalyzes on certain reactions. The chemical reactions taking place in a cell will most likely speed up if the 3. A genetic material stops replicating. B the size of the cell increases. C the enzymes involved become inactive. D the concentration of the reactants is increased. 4. Enzymes A are able to heat up molecules so that they can react B provide CO2 for chemical reactions. C are biological catalysts....
that moves out the cell The sodium-potassium pump is an A. Enzyme ATP B. Enzyme, sodium C. Peripheral protein sodium D. Peripheral protein potassium E. All of the above reactions Activation energy is required for A. Anabolic B. Catabolic C. A&B D. None of the above In which environment would an organism benefit from having a high concentration of unsaturated lipids in the cell membrane? A. Extreme cold temperatures B. Extreme hot temperature C. Dry Conditions D. Wet conditions E....
question 3: what happens to the structure of a protein when it is
denatured?
question 4: why is it important for a protein to be at a
certain ph to carry out its function
zymes in your textbook, especially the sections on enzym REPORT: Your report should include two separate files: a table of the data from your enzyme experiments online and conclusions consisting of answers to the questions. WARM-UP QUESTIONS: 1. What part of the name 6-O-a-L-ramnosyl-D-glucosidase shows that...
4. Noncompetitive inhibitors: a) bind to the active site b) bind to the enzyme-substrate complex c) bind outside the active site and decrease substrate binding d) bind outside the active site and decrease rate of catalysis. 5. Which statement best describes the effect of pH upon enzyme catalyzed reactions? a) rate increases with increasing pH b) rate decreases with increasing pH c) rate increases with increasing pH until the denaturation pH is reached d) every enzyme has an optimum pH...
An enzyme works well as a catalyst at a pH of 6.8. The pk of an essential catalytic residue is known to be 7.2 It is found that catalytic activity is significantly lower when pH= 8.1. What is likely the cause of the decrease in activity? Select all that apply. Select one or more: a. Glu or Asp must lose a proton to inactivate the protein, b. The protein has changed shape due to a change in charge. c. His...
Which statement about acetylation is false? a. A protein may be acetylated at the N' terminus by acetyltransferase D. A protein may be acetylated on a lysine R group by an acetyltransferase C. Acetylation is not reversible. d. Acetylation may induce a conformation change in the protein. QUESTION 2 True/False: All proteins that are ubiquitinated are sent to the proteasome and degraded True False QUESTION 3 If a hydrolytic enzyme of the lysosome escapes and enters the cytosol, it will...
Enzymes are biological catalysts and Unction by A) increasing the free energy in a system. B) lowering the activation energy of a reaction. C) lowering entropy in a system. D) increasing the temperature near a reaction. E) altering the equilibrium of a reaction. Which of the following contributes to the specificity of enzymes? A) Each enzyme has a wide range of temperature and pH optimum B) Each enzyme has an active site that interacts with many C) Substrates themselves may...
11. Local conditions can affect the specificity of an enzyme for its substrate, and thus the enzyme's catalytic activity. Which of the following alterations would be least likely to affect an enzyme in this manner? a) Increased temperature b) Increased substrate concentration c) increased H concentration d) Increased pH e) none of the above True / False: (3 pts each) 12. The Gl tracts of carnivores are longer and more specialized than those of herbivores. 13. Micelles are formed when...
ICE Chapter 7 .) Match each Catalytic Mechanism or Enzyme Mediated Reaction to its description: a. Act as molecular switches by turning on/off cell signaling and gene expression Acid-Base Catalysis b. Isomerizations, condensations, and Covalent Catalysis dehydrations (hydrolysis) c Nucleophile group on the enzyme attacks an electrophile substrate, forming an enzyme- Metal lon Catalysis substrate intermediate d. Proton transfer involving water or a functional group Coenzyme Dependent Redox Reactions e. Include dehyd rogenases. Involves NAD /NADH, NADP*/NAD PH, FAD/FADH2, FMN/FMNH2...
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