For the electron transport chain, all are inhibitors except: Select one: O a. Antimycin A O b. fluoroacetate c. Oc. Amytal O d. NaN2
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- Complex III contains which cofactor as a prosthetic group? A. iron-sulfur clusters B. FAD C. FMN D. coenzyme Q E. copperUncouplers of oxidative phosphorylation are all expect: Select one: O a. thermogenin O b. dinitrocresol O c. antimycin A O d. 2,4 dinitrophenolWhich of the following is not a CYP450 catalyzed oxidation/reduction reaction? O A. deamination OB. hydroxylation c.epoxidation O D. N-demethylation O E. alcohol oxidation
- Which of the following is incorrect about chymotrypsin? It uses acid-base catalysis b. It has three essential amino acid residues (called the catalytic triad) at the active site It does not use metal catalysis d. It does not use covalent catalysis a. O c.bisphosphoglycerate mutase is an example of Select one: a. transferase b. lyase c. none d. isomeraseDoes the following inhibitors decrease ATP production or Blocks ATP production? a. DCCD b. FCCP c. Amytal d. Carboxin e. Cyanide
- 1. Choose all the correct answers. Enzyme catalyzing this reaction: COO CO0 но C-H + NAD* CH2 + NADH + H* CH2 лвенный тет CoO COO L-Malate Oxaloacetate A. Belongs to the class of transferases. B. Belongs to the class of oxidoreductases. C. Is a simple enzyme. D. Is a holoenzyme.A solution of glucose is 100% labeled with 13C at carbon 6, then is reacted upon with glycolytic enzymes. Which of the following correctly described the resuling glyceraldehyde-3-phosphate? a. 100% labeled at carbon 1 b. 100% labeled at carbon 3 c. 50% labeled at carbon 1. d. 50% labeled at carbon 3.Proteases are one of the main drug targets. Choose the False statement regarding proteases. A. Proteases are enzymes that cleave peptide bonds. B. Water is a reactant in the reaction catalyzed by proteases. C. Proteases, like all enzymes show substrate specificity, meaning they cleave only substate that fit the bonding product. D. Proteases rely on the proton transfer from NADH to the substrate. E. Protease mechanism involves only acid-base catalysis.
- Classification of flavonoids is based on: Select one: a. The oxidation state of the heterocyclic ring C b. The position of ring B c. The number of oxygen atoms in the cycle d. Two choices are trueCOO COO C -NH2 CH2 CH2 1 3 CH2 CH2 CH2 4 CH2 H- -NH3 -NH3 H- C COO CO- А C a. Aminotransferase is the only enzyme that can catalyze the B -> C conversion b. Reaction 4 requires ATP c. All reactions (1-4) run only in the liver d. Compound A is a nitrogen donor for synthesis of 5- ribosylamine e. Reaction 1 is a hydrolysis and the enzyme catalyzing this reaction is active only in hepatocytesWhich of the following organisms cannot perform oxidative phosphorylation? Select one: a. E. coli b. tulips c. white rhinos d. mushrooms e. none of the above Clear my choice