Enzymes
Common feature in all serine proteases is a

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

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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 a chemical derivative of aspirin
It catalyzes the production of hormones that maintain the stomach lining
It is critical for the biosynthesis of DNA

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Enzymes
Which of the following statements about enzymes or their function is true?

Enzymes speed up reactions by lowering activation energy
Enzymes do not alter the overall change in free energy for a reaction
Enzymes are proteins whose three-dimensional form is key to their function
All of these

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