Enzymes
Common feature in all serine proteases is a

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

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

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

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

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