Enzymes The nucleophile in serine proteases is Asparagine water Serine both (a) and (b) Asparagine water Serine both (a) and (b) ANSWER DOWNLOAD EXAMIANS APP
Enzymes The role of Asp 102 and His 57 during trypsin catalysis is to function as a proton shuttle clamp the substrate into the active site keep the specificity pocket open neutralize the charge on the other's side chain function as a proton shuttle clamp the substrate into the active site keep the specificity pocket open neutralize the charge on the other's side chain ANSWER DOWNLOAD EXAMIANS APP
Enzymes Which of the common features are shared between serine and aspartate proteases? Both show specificity for certain amino acid sequences Both require water to complete the catalytic cycle Both use a base to activate the nucleophile All of these Both show specificity for certain amino acid sequences Both require water to complete the catalytic cycle Both use a base to activate the nucleophile All of these 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 88 kJ/mol 58 kJ/mol 49 kJ/mol 40 kJ/mol 88 kJ/mol 58 kJ/mol 49 kJ/mol ANSWER DOWNLOAD EXAMIANS APP
Enzymes What is the specificity of the Clostripain protease? None of these It cleave after His residues It cleave after Arg residues It cleave after Lys residues None of these It cleave after His residues It cleave after Arg residues It cleave after Lys residues ANSWER DOWNLOAD EXAMIANS APP
Enzymes How is the enzyme COX-1 important in human health? It is critical for the biosynthesis of DNA It helps to transport carbon dioxide in the blood It catalyzes the production of hormones that maintain the stomach lining It is a chemical derivative of aspirin It is critical for the biosynthesis of DNA It helps to transport carbon dioxide in the blood It catalyzes the production of hormones that maintain the stomach lining It is a chemical derivative of aspirin ANSWER DOWNLOAD EXAMIANS APP
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