Enzymes
Which of the common features are shared between serine and aspartate proteases?

Both use a base to activate the nucleophile
Both require water to complete the catalytic cycle
All of these
Both show specificity for certain amino acid sequences

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

It is critical for the biosynthesis of DNA
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

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