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

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

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

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

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Enzymes
The E.coli pyruvic acid dehydrogenase complex is reported to

decatalyze the oxidation of pyruvic acid to acetyl Co A and CO2
retard the reduction of pyruvic acid to acetyl Co A and CO2
Catalyze the oxidation of pyruvic acid to acetyl Co A and CO2
Catalyze the reduction of pyruvic acid to acetyl Co A and CO2

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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 forms an acyl-enzyme intermediate
Both require water to complete the catalytic cycle

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