Question

Which of the following is not true about channels?

a. They are made of sequences of amino acids and fatty acids
b. They allow diffusion of ions
c. They have a conformation similar to a doughnut
d. Their diameter is slightly larger than that of the ion
e. They are integral proteins

Answer 1

Ion channels are pores in the cell membrane that allow the diffusion of ions. They are integral proteins made up of amino acids and have a conformation similar to a doughnut. The diameter of the ion channels is slightly larger than that of the ions.

Step-by-step explanation:

Ion channels are pores in the cell membrane that allow specific charged particles to cross the membrane. They are made up of sequences of amino acids and not fatty acids, so option a is not true. Ion channels allow the diffusion of ions, have a conformation similar to a doughnut, and their diameter is slightly larger than that of the ion. Additionally, they are integral proteins, meaning they are embedded within the membrane.