Enzymes
The proteolysis rate enhancement by chymotrypsin (~1010 folds) corresponds to a reduction in activation energy of about

49 kJ/mol
88 kJ/mol
40 kJ/mol
58 kJ/mol

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

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

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

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
Enzymes speed up reactions by lowering activation energy
All of these

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

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

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