Consider the simplified schematic of a eukaryotic cell shown below. Schematic of eukaryotic cell
Region A indicates the cell’s cytoplasm; Region B indicates the inside of an organelle. The pH of the cytoplasm is 7, and the pH of organelle B is 2. (“pH” is a measure of the acidity of a solution.)

The optimum pH range for each enzyme is shown below. Consider the activity of two enzymes, enzyme 1 and enzyme 2 (an enzyme is a protein that enables chemical reactions to proceed more quickly).

Graph of enzyme activity (y-axis) as a function of pH (x-axis). The activity of enzyme 1 peaks at pH 2, and the activity of enzyme 2 peaks at pH 7
Part 1. In which region of the cell (A or B) will the purple enzyme (enzyme 2, right-most curve) be most active?

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Part 2. In which region (A or B) will the blue enzyme (enzyme 1, left-most curve) be most active?

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Part 3. Imagine if both enzymes were present in the same prokaryotic cell. Could both enzymes have full activity?