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 helps to transport carbon dioxide in the blood
It is critical for the biosynthesis of DNA

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

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

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Enzymes
The cleavage specificity of trypsin and chymotrypsin depend in part on the

size, shape, and charge of the active site or specificity pocket
proximity of Ser 195 to the active site or specificity pocket
presence of a low-barrier hydrogen bond in the active site or specificity pocket
absence of water in the active site

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

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

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