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

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

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Enzymes
Enzyme-driven metabolic pathways can be made more efficient by

concentrating enzymes within specific cellular compartments
fixing enzymes into membranes so that they are adjacent to each other
All of these
grouping enzymes into free-floating, multienzyme complexes

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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 forms an acyl-enzyme intermediate
Both show specificity for certain amino acid sequences
Both require water to complete the catalytic cycle

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

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

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