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

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

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

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

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

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

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

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