Enzymes
Common feature in all serine proteases is a

hydrophilic specificity pocket
single reactive serine residue
cluster of reactive serine residues
hydrophobic specificity pocket

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

changing the three-dimensional shape of the molecule
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

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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
Catalyze 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 reduction of pyruvic acid to acetyl Co A and CO2

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

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

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