Question

select the false statement about transporter proteins in membranes (pumps and channels). a) ion channels can be selective. b) ion channels can exist in open and closed states. c) membranes are less permeable to na ion than to glucose. d) membrane pumps are energy transducers. e) lipophilic molecules need to be actively transported through membranes by pumps.

Answer 1

The false statement about transporter proteins is that lipophilic molecules need to be actively transported through membranes by pumps; in reality, lipophilic molecules can diffuse passively.

Step-by-step explanation:

To answer the question, we need to select the false statement about transporter proteins in membranes (pumps and channels). The options given are:

(a) Ion channels can be selective.

(b) Ion channels can exist in open and closed states.

(c) Membranes are less permeable to Na+ ion than to glucose.

(d) Membrane pumps are energy transducers.

(e) Lipophilic molecules need to be actively transported through membranes by pumps.

After reviewing the information, the false statement is (e) Lipophilic molecules need to be actively transported through membranes by pumps. This is incorrect because lipophilic molecules can easily diffuse across the cell membrane without the need for active transport, as they merge well with the hydrophobic interior of the lipid bilayer.