Enzymes
Before they can react, many molecules need to be destabilized. This state is typically achieved through

changing the reaction from a biosynthetic to a catabolic pathway
changing the three-dimensional shape of the molecule
the input of a small amount of activation energy
oxidizing the molecules by removing electrons

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

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
It is critical for the biosynthesis of DNA

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

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

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