Enzymes Which of the following statements about enzymes or their function is true? All of these Enzymes speed up reactions by lowering activation energy Enzymes are proteins whose three-dimensional form is key to their function Enzymes do not alter the overall change in free energy for a reaction All of these Enzymes speed up reactions by lowering activation energy Enzymes are proteins whose three-dimensional form is key to their function Enzymes do not alter the overall change in free energy for a reaction ANSWER DOWNLOAD EXAMIANS APP
Enzymes The proteolysis rate enhancement by chymotrypsin (~1010 folds) corresponds to a reduction in activation energy of about 40 kJ/mol 58 kJ/mol 88 kJ/mol 49 kJ/mol 40 kJ/mol 58 kJ/mol 88 kJ/mol 49 kJ/mol ANSWER DOWNLOAD EXAMIANS APP
Enzymes The role of Asp 102 and His 57 during trypsin catalysis is to clamp the substrate into the active site function as a proton shuttle keep the specificity pocket open neutralize the charge on the other's side chain clamp the substrate into the active site function as a proton shuttle keep the specificity pocket open neutralize the charge on the other's side chain ANSWER DOWNLOAD EXAMIANS APP
Enzymes How is the enzyme COX-1 important in human health? It is a chemical derivative of aspirin It catalyzes the production of hormones that maintain the stomach lining It helps to transport carbon dioxide in the blood It is critical for the biosynthesis of DNA It is a chemical derivative of aspirin It catalyzes the production of hormones that maintain the stomach lining It helps to transport carbon dioxide in the blood It is critical for the biosynthesis of DNA ANSWER DOWNLOAD EXAMIANS APP
Enzymes Which of the following is false statement with regard to comparison between Serine and HIV proteases? Both forms an acyl-enzyme intermediate Both require water to complete the catalytic cycle Both use nucleophilic attack to hydrolyze the peptide bond Both show specificity for certain amino acid sequences Both forms an acyl-enzyme intermediate Both require water to complete the catalytic cycle Both use nucleophilic attack to hydrolyze the peptide bond Both show specificity for certain amino acid sequences ANSWER DOWNLOAD EXAMIANS APP
Enzymes The E.coli pyruvic acid dehydrogenase complex is reported to Catalyze the oxidation of pyruvic acid to acetyl Co A and CO2 retard the reduction of pyruvic acid to acetyl Co A and CO2 decatalyze the oxidation of pyruvic acid to acetyl Co A and CO2 Catalyze the reduction of pyruvic acid to acetyl Co A and CO2 Catalyze the oxidation of pyruvic acid to acetyl Co A and CO2 retard the reduction of pyruvic acid to acetyl Co A and CO2 decatalyze the oxidation of pyruvic acid to acetyl Co A and CO2 Catalyze the reduction of pyruvic acid to acetyl Co A and CO2 ANSWER DOWNLOAD EXAMIANS APP
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