Enzymes
Which of the common features are shared between serine and aspartate proteases?

Both require water to complete the catalytic cycle
Both show specificity for certain amino acid sequences
All of these
Both use a base to activate the nucleophile

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

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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
All of these
grouping enzymes into free-floating, multienzyme complexes
concentrating enzymes within specific cellular compartments

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

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