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

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

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

It helps to transport carbon dioxide in the blood
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

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