Enzymes
The proteolysis rate enhancement by chymotrypsin (~1010 folds) corresponds to a reduction in activation energy of about

40 kJ/mol
58 kJ/mol
49 kJ/mol
88 kJ/mol

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Enzymes
Before they can react, many molecules need to be destabilized. This state is typically achieved through

changing the three-dimensional shape of the molecule
the input of a small amount of activation energy
changing the reaction from a biosynthetic to a catabolic pathway
oxidizing the molecules by removing electrons

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Enzymes
In the enzyme-catalyzed reaction shown below, what will be the effect on substances A, B, C, and D of inactivating the enzyme labeled E2? A ---(E1)---> B ---(E2)---> C ---(E3)--->

A, B, C, and D will all still be produced
A, B, and C will still be produced, but not D
A will still be produced, but not B, C, or D
A and B will still be produced, but not C or D

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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
size, shape, and charge of the active site or specificity pocket
absence of water in the active site

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