biological evaluation of the next hexapeptide. Place these peptides in descending order, starting with the highest (for example, Peptide 2> peptide 1> peptide 3) and mark the essential amino acids: 1) Glu-Asp-Pro-Ala-Cys-Gly; 2) Glu-Asp-Pro-Ala-Val-Cys; 3) Glu-Val-Pro-Thr-Ala-Gly;

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.

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