Enzymes
The proteolysis rate enhancement by chymotrypsin (~1010 folds) corresponds to a reduction in activation energy of about

88 kJ/mol
40 kJ/mol
58 kJ/mol
49 kJ/mol

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

Both show specificity for certain amino acid sequences
Both require water to complete the catalytic cycle
Both use nucleophilic attack to hydrolyze the peptide bond
Both forms an acyl-enzyme intermediate

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

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

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