<prompt> Cardiolipin is an impoant component of which of the following:MitochondriaCell membraneRibosomeAll of the above  <response>: Phosphatidic acid is a precursor of phosphatidyl-glycerol which, in turn, gives rise to cardiolipin. This phospholipid is found only in mitochondria and is essential for mitochondrial function. Ref: Harper 28th edition, chapter 16. 