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

It is a chemical derivative of aspirin
It catalyzes the production of hormones that maintain the stomach lining
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

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

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Enzymes
Which of the following statements about enzymes or their function is true?

Enzymes speed up reactions by lowering activation energy
Enzymes are proteins whose three-dimensional form is key to their function
Enzymes do not alter the overall change in free energy for a reaction
All of these

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