Final answer:
The other leaflet contains phosphatidylcholine, a major phospholipid component of the plasma membrane with a choline head group.
Step-by-step explanation:
The other leaflet has phosphatidylcholine as the type of phospholipid. This lipid is one of the primary constituents of the biological membrane and plays a critical role in the plasma membrane's structure and function.
Phosphatidylcholine molecules are comprised of a glycerol backbone, two fatty acids, a phosphate group, and a choline head group. The fatty acid chains are hydrophobic and face inward in the bilayer, while the choline head group is hydrophilic and interacts with the aqueous environment outside and inside the cell, providing stability and fluidity to the membrane.
Phosphatidylcholine, or phosphatidyl choline, is a type of phospholipid that is present in the other leaflet. Phosphatidylcholines have a common structure that includes glycerol, two fatty acid chains, a phosphate, and a choline group. These phospholipids are important constituents of biological membranes, including the plasma membrane of cells.