Question

About membrane transport, which statement is WRONG?

A. There is a Vmax for uniport transporters.
B. The energy required for membrane transport can come from ATP or electrochemical gradients.
C. Water as a small molecule is highly permeable through biomembranes.
D. Symporters and antiporters both utilize the energy stored in the concentration gradient of a transport molecule.

Answer 1

The correct answer is C. Water as a small molecule is highly permeable through biomembranes.

Step-by-step explanation:

The correct answer is C. Water as a small molecule is highly permeable through biomembranes.

While it is true that some small molecules, like water, can easily pass through the cell membrane, not all small molecules are highly permeable. For example, polar molecules like ions and some solutes cannot pass through the cell membrane easily and require specific protein channels for facilitated transport.

In contrast, options A, B, and D are all correct statements. Uniport transporters do have a Vmax, the energy required for membrane transport can come from ATP or electrochemical gradients, and both symporters and antiporters utilize the energy stored in the concentration gradient of a transport molecule.