This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory chain, Subject name: Biochemistry
Thermogenin is present in 
Select and explain. 
A. Cytoplasm, B. Mitochondria, C. Ribisome, D. Nucleus
B: Mitochondria
Answer: B: Mitochondria 
Explanation: Thermogenin, a protein present in the inner mitochondrial membrane of adipocytes, provides an alternate pathway for protons. It is one of the uncoupling proteins (UCP).Ref: DM Vasudevan Textbook of Medical Biochemistry, 6th edition, page no: 234