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

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

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

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

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Enzymes
How is the enzyme COX-1 important in human health?

It is a chemical derivative of aspirin
It is critical for the biosynthesis of DNA
It helps to transport carbon dioxide in the blood
It catalyzes the production of hormones that maintain the stomach lining

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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, 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
A, B, C, and D will all still be produced

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