Enzymes Which of the following statements about enzymes or their function is true? Enzymes are proteins whose three-dimensional form is key to their function All of these Enzymes do not alter the overall change in free energy for a reaction Enzymes speed up reactions by lowering activation energy Enzymes are proteins whose three-dimensional form is key to their function All of these Enzymes do not alter the overall change in free energy for a reaction Enzymes speed up reactions by lowering activation energy ANSWER DOWNLOAD EXAMIANS APP
Enzymes In the enzyme-catalyzed reaction shown below, what will be the effect on substances A, B, C, and D of inactivating the enzyme labeled E2? A ---(E1)---> B ---(E2)---> C ---(E3)---> A, B, C, and D will all still be produced A will still be produced, but not B, C, or D A, B, and C will still be produced, but not D A and B will still be produced, but not C or D A, B, C, and D will all still be produced A will still be produced, but not B, C, or D A, B, and C will still be produced, but not D A and B will still be produced, but not C or D ANSWER DOWNLOAD EXAMIANS APP
Enzymes The cleavage specificity of trypsin and chymotrypsin depend in part on the absence of water in the active site size, shape, and charge of the active site or specificity pocket presence of a low-barrier hydrogen bond in the active site or specificity pocket proximity of Ser 195 to the active site or specificity pocket absence of water in the active site size, shape, and charge of the active site or specificity pocket presence of a low-barrier hydrogen bond in the active site or specificity pocket proximity of Ser 195 to the active site or specificity pocket ANSWER DOWNLOAD EXAMIANS APP
Enzymes The proteolysis rate enhancement by chymotrypsin (~1010 folds) corresponds to a reduction in activation energy of about 49 kJ/mol 58 kJ/mol 40 kJ/mol 88 kJ/mol 49 kJ/mol 58 kJ/mol 40 kJ/mol 88 kJ/mol ANSWER DOWNLOAD EXAMIANS APP
Enzymes Tryprotophan synthetase of E.coli, a typical bifunctional oligomeric enzyme consist of a protein designated A two proteins designated A and B a protein designated B a protein A and one-subunit a a protein designated A two proteins designated A and B a protein designated B a protein A and one-subunit a ANSWER DOWNLOAD EXAMIANS APP
Enzymes The E.coli pyruvic acid dehydrogenase complex is reported to 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 oxidation of pyruvic acid to acetyl Co A and CO2 Catalyze the reduction 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 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