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

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

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

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

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

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

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

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Enzymes
Which of the following is false statement with regard to comparison between Serine and HIV proteases?

Both require water to complete the catalytic cycle
Both use nucleophilic attack to hydrolyze the peptide bond
Both show specificity for certain amino acid sequences
Both forms an acyl-enzyme intermediate

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