The Cell membrane contains

A) a double layer of fatty acid tails and phosphate heads
B) cholesterol
C) protein channels or pores
D) a and b
E A,B, and C

Its E. the cell membrane contains a double layer of fatty acid tails and phosphate heads which allow for diffusion to take place, the protein channels are there for more complex molecules to pass through the membrane and cholesterole is there to prevent cell from freezing ( like a layer of fat )

The correct answer is E) A, B, and C - the cell membrane contains a double layer of fatty acid tails and phosphate heads, cholesterol, and protein channels or pores. To arrive at this answer, one can understand the structure and composition of the cell membrane.

The cell membrane is made up of a phospholipid bilayer, meaning it consists of two layers of phospholipids. Each phospholipid molecule contains a hydrophilic (water-loving) phosphate head and hydrophobic (water-fearing) fatty acid tails. This arrangement leads to the formation of the lipid bilayer, with the hydrophobic tails facing each other, shielding themselves from the surrounding water, while the hydrophilic heads face outward, interacting with the watery fluids inside and outside the cell.

In addition to phospholipids, the cell membrane also contains cholesterol. Cholesterol molecules are interspersed within the lipid bilayer and help enhance the stability and fluidity of the membrane.

Furthermore, the cell membrane features protein channels or pores that facilitate the movement of molecules and ions across the membrane. These protein channels act as gateways or tunnels, allowing specific substances to pass through the membrane. They play a crucial role in various cellular functions, such as nutrient uptake, waste removal, and cellular communication.

In summary, the cell membrane contains a double layer of fatty acid tails and phosphate heads (phospholipid bilayer), cholesterol, and protein channels or pores.