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

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Enzymes
How is the enzyme COX-1 important in human health?

It is a chemical derivative of aspirin
It is critical for the biosynthesis of DNA
It catalyzes the production of hormones that maintain the stomach lining
It helps to transport carbon dioxide in the blood

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Enzymes
Which of the following is false statement with regard to comparison between Serine and HIV proteases?

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

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