Enzymes
What is the specificity of the Clostripain protease?

It cleave after His residues
None of these
It cleave after Lys residues
It cleave after Arg residues

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

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

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

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

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

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