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

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

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Enzymes
Which of the following is false statement with regard to comparison between Serine and HIV proteases?

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

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Enzymes
Enzyme-driven metabolic pathways can be made more efficient by

All of these
fixing enzymes into membranes so that they are adjacent to each other
grouping enzymes into free-floating, multienzyme complexes
concentrating enzymes within specific cellular compartments

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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 reduction 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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