During early digestion, the concentrations of pepsin and pepsinogen change insid

Question

During early digestion, the concentrations of pepsin and pepsinogen change inside of the stomach. The formation of the active form is enhanced by a feedback mechanism such that active forms can convert inactive forms to produce more active forms. To study this conversion in the lab, scientists purified both pepsin and pepsinogen and added one of the two forms to a solution at pH = 2. They then monitored the concentrations of both pepsin and pepsinogen in solution. The results are shown below. b) a) Time Which curve best represents pepsin concentration? Curve a (dashed line) Curve b (solid line)

Explanation / Answer

The curve A represents the pepsin concentration because at Ph 2 the optimum activity for pepsin can be observed. So, the pepsinogen that is shown as curve b decreases and concentration of pepsin that is represented by curve a increases.

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