Enzymes
Common feature in all serine proteases is a

hydrophilic specificity pocket
hydrophobic specificity pocket
single reactive serine residue
cluster of reactive serine residues

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

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

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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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