$1.$ Draw the structure of phosphatidic acid. Circle the polar parts of the molecule and box the non$-$polar parts of the molecule.

$2.$Based on the structure why would this molecule be a major building block for glycerophospholipids that make up the cell membrane? In your answer include which part of the molecule would be inside the membrane and which one out and why.

$3.$ What specific $$effect$$would drive your answer to $2?$