The option that most effectively substitutes the letters X and Y would be:
A). X: substrate
Y: active site
- "Substrate" is described as the surface on which an organism enlarges or to which it is associated.
- In the given situation, the attachment of item X with item Y will allow Y to develop/grow and perform the chemical reaction.
- Therefore, X exemplifies substrate while Y demonstrates the active site.
Thus, option A is the correct answer.
Learn more about "Substrate" here:
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