University:
University of Pennsylvania
Course:
CHEM 5510 | Biological Chemistry I
Academic year:

2021
Views:

490

Pages:

2
Author:

ilikemyicons0y5

Quiz #3: Proteins, reaction rates, and enzymes Name: ____________ Use the table of amino acids provided to draw the line-angle structure of the tripeptide: N-Val-Gln-Lys-C. (Leave some room to answer question 2 below.) Circle the atoms or groups in your structure above that can participate in formation of tertiary structure, and label each circle with the strongest type of interaction or force that each circled group can participate in. Val - R1 -> London Forces Gln - R2 -> London Forces, Dipole-dipole Lys - R3 -> London Forces, Ionic bond 3. The reaction rate for the reaction catalyzed by the enzyme ATP synthase (shown below) was studied over a range of temperatures. The concentrations of substrates and enzyme and the pH were kept constant. The data from this experiment is given in the graph below. ADP + phosphate --- ATP synthase --> ATP + water Use code with caution. (Graph) Y-axis: Rate of ATP formation (mmol/min) X-axis: Temperature (Celsius) The graph shows a bell curve with a peak around 37 degrees Celsius. a. The graph gives evidence that in general, higher temperatures lead to faster reaction rates. Explain this observation in terms of collision theory, using diagrams if necessary. b. Explain why the general trend you explained in part a above is no longer true when the reaction mixture is heated over 37°C. Your explanation should draw on principles of protein structure and enzyme function.

Quiz # 3 Protein, Reaction Rates, and Enzymes

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