Final answer:
Phospholipids are constructed from products of photosynthesis, like carbohydrates, that form the carbon backbone of the fatty acids and glycerol in phospholipids, essential for plasma membrane structure.
Step-by-step explanation:
The statement that best supports the claim that phospholipids are large molecules created by rearranging the products of photosynthesis is that the products of the light-independent reactions of photosynthesis, which include carbohydrates and other forms of reduced carbon, can be used to construct the fatty acid chains and glycerol backbone of phospholipids. These components are then assembled with a phosphate group to form phospholipids, which are important constituents of the plasma membrane of cells.
Phospholipids have a glycerol backbone to which two fatty acids are attached, forming a diacylglycerol, and a phosphate group that is modified by an alcohol. These molecules are amphipathic, with hydrophilic heads and hydrophobic tails, allowing them to form bilayers that constitute cell membranes. Photosynthesis produces the carbohydrate molecules that ultimately are the source of the carbon backbone in the synthesis of these fatty acids.