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

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

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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 forms an acyl-enzyme intermediate
Both show specificity for certain amino acid sequences

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