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

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

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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
The E.coli pyruvic acid dehydrogenase complex is reported to

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

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