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2. The heme group found in hemoglobin is an example of which of the following? a....
2. The heme group found in hemoglobin is an example of which of the following? a....
2. The heme group found in hemoglobin is an example of which of the following? a. Metal ion b. Cosubstrate c. Coenzyme d. None of the above 3. A is altered in the course of the reaction and dissociates from the active site of the enzyme a. Casubstrate b. Prosthetic group c. Metal ion d. None of the above 4. NADH is an example of an a. Metal ion b. Organic cofactor c. Coenzyme d. B and C A catalytically...
QUESTION 4 Which of the following statements is false? a. A cofactor may be an exogenous...
QUESTION 4 Which of the following statements is false? a. A cofactor may be an exogenous small molecule necessary for enzymatic function. b. A holoenzyme lacks its cofactor and/or coenzyme. c. A coenzyme is typically a vitamin-derived component. d. A ligase typically uses ATP cleavage to form bonds. e. An apoenzyme is typically catalytically inactive.
The enzyme pyruvate decarboxylase uses several redox coenzymes. Which of the following is the best description...
The enzyme pyruvate decarboxylase uses several redox coenzymes. Which of the following is the best description of the coenzymes NADH and FADH2? A.NADH of a prosthetic group and FADH2 is a cosubstrate. B.FADH2 of a prosthetic group and NADH is a cosubstrate. C. NADH and FADH2 are both is cosubstrates. D. NADH and FADH2 are both prosthetic groups
QUESTION 17 Which of the following is NOT used as a criterion to classify viruses? Nucleic...
QUESTION 17 Which of the following is NOT used as a criterion to classify viruses? Nucleic acid Number of capsomeres Morphology Size Biochemical tests QUESTION 18 In which pathway is the most NADH generated? the electron transport system the Krebs cycle glycolysis alcoholic fermentation mixed acid fermentation QUESTION 19 An envelope is acquired during which of the following steps? Adsorption Biosynthesis Release Penetration Uncoating QUESTION 20 An apoenzyme is part of a simple enzyme. also called a coenzyme. the protein...
Which statement is false about the heme group contained in globins? The chemical structure of the...
Which statement is false about the heme group contained in globins? The chemical structure of the heme groups in myoglobin and hemoglobin B The heme group is tightly, but non-covalently, held in myoglobin molecule. When oxygen binds to heme, the iron ion is oxidized from Fe to Fe3. If exposed to air, a free heme group (not associated with hemoglobin) is readily oxidized converting Fe2 to Fe3 and can no longer bind oxygen A are identical. C D
41. An enzyme-substrate complex forms when substrate binds to an enzyme at the enzyme's site. 42....
41. An enzyme-substrate complex forms when substrate binds to an enzyme at the enzyme's site. 42. An inorganic ion such as zinc or manganese that is needed for an enzyme to function is acting as a 43. Competitive inhibition of enzymes occurs when: site A) catalytic B) allosterie C) operative B) cofactor C) apoenzyme D) holoenzyme A) coenzyme A) the inhibitor binds to the active site of the enzyme B) the inhibitor binds to the allosteric site of the enzyme...
12. Which of the following statements is true of enzyme catalysts? A B C To be...
12. Which of the following statements is true of enzyme catalysts? A B C To be effective, they must be present at the same concentration as their substrate. They can increase the equilibrium constant for a given reaction by a thousand-fold or more. They lower the activation energy for conversion of substrate to product. Their catalytic activity is independent of pH. They are generally equally active on D and L isomers of a given substrate. D E 13. In competitive...
Which of these is not found in myoglobin? A) alpha helix b) beta sheet c) heme...
Which of these is not found in myoglobin? A) alpha helix b) beta sheet c) heme group 1. d) globular folding pattern 2. Which statement about hemoglobin is not true? A) it is globular b) it contains helix- loop-helix c) it has three subunits d) it has heme groups 3. The molecule which binds in the central cavity of hemoglobin when it is deoxygenated is: a) CO2 b) heme c) BPG d) all of these 4. The transition of hemoglobin...
ter 9. Hemoglobin and Myoglobin Which of these is not found in myoglobin? A) alpha helix...
ter 9. Hemoglobin and Myoglobin Which of these is not found in myoglobin? A) alpha helix b) beta sheetc) heme group, d) globular folding pattern • Which statement about hemoglobin is not true? A) it is globular b) it contains helix loop-helix c) it has three subunits d) it has heme groups · The molecule which binds in the central cavity of hemoglobin when it is deoxygenated is: a) CO2 b) heme c) BPG d) all of these - The...
Chapter 9. Hemoglobin and Myoglobin 1. Which of these is not found in myoglobin? A) alpha...
Chapter 9. Hemoglobin and Myoglobin 1. Which of these is not found in myoglobin? A) alpha helix b) beta sheet c) heme group d) globular folding pattern 2. Which statement about hemoglobin is not true? A) it is globular b) it contains helix- loop-helix c) it has three subunits d) it has heme groups 3. The molecule which binds in the central cavity of hemoglobin when it is deoxygenated is: a) CO2 b) heme c) BPG d) all of these...
2. The heme group found in hemoglobin is an example of which of the following? a. Metal ion b. Cosubstrate c. Coenzyme d. None of the above 3. A is altered in the course of the reaction and dissociates from the active site of the enzyme a. Casubstrate b. Prosthetic group c. Metal ion d. None of the above 4. NADH is an example of an a. Metal ion b. Organic cofactor c. Coenzyme d. B and C A catalytically...
QUESTION 4 Which of the following statements is false? a. A cofactor may be an exogenous small molecule necessary for enzymatic function. b. A holoenzyme lacks its cofactor and/or coenzyme. c. A coenzyme is typically a vitamin-derived component. d. A ligase typically uses ATP cleavage to form bonds. e. An apoenzyme is typically catalytically inactive.
QUESTION 17 Which of the following is NOT used as a criterion to classify viruses? Nucleic acid Number of capsomeres Morphology Size Biochemical tests QUESTION 18 In which pathway is the most NADH generated? the electron transport system the Krebs cycle glycolysis alcoholic fermentation mixed acid fermentation QUESTION 19 An envelope is acquired during which of the following steps? Adsorption Biosynthesis Release Penetration Uncoating QUESTION 20 An apoenzyme is part of a simple enzyme. also called a coenzyme. the protein...
Which statement is false about the heme group contained in globins? The chemical structure of the heme groups in myoglobin and hemoglobin B The heme group is tightly, but non-covalently, held in myoglobin molecule. When oxygen binds to heme, the iron ion is oxidized from Fe to Fe3. If exposed to air, a free heme group (not associated with hemoglobin) is readily oxidized converting Fe2 to Fe3 and can no longer bind oxygen A are identical. C D
41. An enzyme-substrate complex forms when substrate binds to an enzyme at the enzyme's site. 42. An inorganic ion such as zinc or manganese that is needed for an enzyme to function is acting as a 43. Competitive inhibition of enzymes occurs when: site A) catalytic B) allosterie C) operative B) cofactor C) apoenzyme D) holoenzyme A) coenzyme A) the inhibitor binds to the active site of the enzyme B) the inhibitor binds to the allosteric site of the enzyme...
12. Which of the following statements is true of enzyme catalysts? A B C To be effective, they must be present at the same concentration as their substrate. They can increase the equilibrium constant for a given reaction by a thousand-fold or more. They lower the activation energy for conversion of substrate to product. Their catalytic activity is independent of pH. They are generally equally active on D and L isomers of a given substrate. D E 13. In competitive...
Which of these is not found in myoglobin? A) alpha helix b) beta sheet c) heme group 1. d) globular folding pattern 2. Which statement about hemoglobin is not true? A) it is globular b) it contains helix- loop-helix c) it has three subunits d) it has heme groups 3. The molecule which binds in the central cavity of hemoglobin when it is deoxygenated is: a) CO2 b) heme c) BPG d) all of these 4. The transition of hemoglobin...
ter 9. Hemoglobin and Myoglobin Which of these is not found in myoglobin? A) alpha helix b) beta sheetc) heme group, d) globular folding pattern • Which statement about hemoglobin is not true? A) it is globular b) it contains helix loop-helix c) it has three subunits d) it has heme groups · The molecule which binds in the central cavity of hemoglobin when it is deoxygenated is: a) CO2 b) heme c) BPG d) all of these - The...
Chapter 9. Hemoglobin and Myoglobin 1. Which of these is not found in myoglobin? A) alpha helix b) beta sheet c) heme group d) globular folding pattern 2. Which statement about hemoglobin is not true? A) it is globular b) it contains helix- loop-helix c) it has three subunits d) it has heme groups 3. The molecule which binds in the central cavity of hemoglobin when it is deoxygenated is: a) CO2 b) heme c) BPG d) all of these...
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