Homework_11_02-04-09_C&A

Homework_11_02-04-09_C&A - Biology 5A Homework 11...

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Biology 5A Homework 11 February 4-6, 2009 1. The accompanying graph of data was obtained in enzyme experiments. The reaction rate at each temperature was measured at the start of an experiment, that is, when the enzyme was first mixed with the substrate. As temperature increased from 20 ° C to 40 ° C, the reaction rate increased because both the substrate molecules and the enzyme molecules moved faster and collided more frequently in solution. The most likely explanation for the shape of the graph in the 55 ° C to 60 ° C range is that: A. Peptide bonds broke, causing the enzyme to lose tertiary structure. B. Hydrogen bonds broke, causing the enzyme to lose secondary, tertiary, and possibly quaternary structure. C. Ionic bond formation increased, causing the enzyme to become too rigid to function. D. Hydrophobic interactions became stronger than peptide bonds and caused the enzyme to precipitate. E.
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This note was uploaded on 02/27/2009 for the course BIO Bio 5A taught by Professor Zhu,rao during the Spring '08 term at UC Riverside.

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Homework_11_02-04-09_C&A - Biology 5A Homework 11...

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