Question

Cell membranes are a border between the aqueous
environment outside the cell and the aqueous
environment of the cytoplasm inside the cell. Cell
membranes are in part made of phospholipid polymers.
Based on the properties of the monomers that make up the phospholipid polymer, which of the following best predicts how the two phospholipids are positioned in the cell membrane?

A) The hydrophilic heads will face outward toward the cell's exterior and inward toward the cell's interior. The fatty acids will be tail-to-tail in the center of the membrane.

B) The glycerol region in the fatty acid will bend toward the interior of the cell. The choline will bend toward the exterior of the cell.

C) The hydrophobic heads will bind with other
hydrophobic heads and turn inward to the center of
the membrane. The fatty acids will randomly move, giving the membrane fluidity.

D) One choline will turn inward toward other choline in the bilayer. The fatty acids will be attracted to the choline and form the interior of the membrane.​

Answer 1

Answer:

I think it’s C because the tails are inside the lipid bilayer and the choline which looks like the hydrophilic heads are the exterior

Answer 2

The hydrophobic tails of the phospholipid are in the interior with the hydrophilic heads facing the aqueous envrionment internally and externally in the cell membrane.

What is the cell membrane?

The cell membrane is a phospholipid bilayer which serves to separate and protect the internal cell contents from the external envrionment.

The cell membrane membrane is arranged such that the hydrophobic tails of the phospholipid are in the interior with the hydrophilic heads facing the aqueous envrionment internally and externally.

Therefore, the hydrophilic heads will face outward toward the cell's exterior and inward toward the cell's interior while the fatty acids will be tail-to-tail in the center of the membrane.

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