This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Organelles, Subject name: Biochemistry
A major lipid of mitochondrial membrane is: 
Select and explain. 
A. Inositol, B. Plasmalogen, C. Cardiolipin, D. Lecithin
C: Cardiolipin
Answer: C: Cardiolipin 
Explanation: Cardiolipin is a phospholipid which is present in inner mitochondrial membrane Found only in mitochondria Can be antigenic Has a role in apoptosis signaling Act as anticoagulant Decreased or altered cardiolipin can lead to ageing, hea failure, hypothyroidism & Bah syndrome (cardioskeletal myopathy) Complex structure Made up of Glycerol attached to two Phosphatidic acid.