Question

1. you want to determine the effect of ph on the uptake of sucrose in tomato plant cells. you expose the cells to a sucrose solution at varying ph levels and record the data shown in the chart below. (a) identify the optimal ph for sucrose uptake in tomato plant cells. (b) explain why the ph identified in part (a) would lead to an increase in sucrose uptake. (c) predict how a ph of 2 would affect sucrose uptake.

Explanation:

Step1: Identify optimal pH

By observing the graph, the highest rate of sucrose uptake occurs at pH 4. So the optimal pH is 4.

Step2: Explain increase at optimal pH

At pH 4, the transport - proteins or enzymes involved in sucrose uptake may be most active. The specific pH can affect the conformation and activity of these proteins, facilitating more efficient binding and transport of sucrose into the cells.

Step3: Predict effect of pH 2

A pH of 2 is more acidic than the optimal pH of 4. It may denature the transport - proteins or enzymes involved in sucrose uptake. This could lead to a decrease in sucrose uptake as the proteins may lose their proper structure and function, reducing their ability to transport sucrose into the tomato plant cells.

Answer:

(a) The optimal pH for sucrose uptake in tomato plant cells is 4.
(b) At pH 4, the transport - proteins or enzymes involved in sucrose uptake are most active, likely due to optimal conformation for binding and transporting sucrose.
(c) A pH of 2 would likely decrease sucrose uptake as it may denature the transport - proteins or enzymes involved in the uptake process.