Enzymes
The role of Asp 102 and His 57 during trypsin catalysis is to

neutralize the charge on the other's side chain
function as a proton shuttle
keep the specificity pocket open
clamp the substrate into the active site

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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 is critical for the biosynthesis of DNA
It helps to transport carbon dioxide in the blood

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Enzymes
The cleavage specificity of trypsin and chymotrypsin depend in part on the

proximity of Ser 195 to the active site or specificity pocket
presence of a low-barrier hydrogen bond in the active site or specificity pocket
absence of water in the active site
size, shape, and charge of the active site or specificity pocket

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

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

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