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

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

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

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

All of these
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

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

All of these
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

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