<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 10-day-old newborn is undergoing surgery for the removal of a branchial cleft cyst. Histopathology of the cyst shows squamous cells with lymphoid infiltrate and keratinaceous cellular debris embedded in adipose tissue with a high concentration of mitochondria. Which of the following substances is most likely to be found within these mitochondria?? A: Thermogenin, B: Leptin, C: Kinesin, D: Ubiquitin, E: Clathrin,  <response>: This is a question about the cellular and molecular biology of a branchial cleft cyst in a newborn. The key details are that the cyst contains squamous cells and adipose tissue with a high concentration of mitochondria. Mitochondria are organelles that generate ATP through cellular respiration. They contain proteins involved in oxidative phosphorylation and the citric acid cycle. Of the answer choices, A Thermogenin is a protein found in the inner mitochondrial membrane that helps generate heat by uncoupling oxidative phosphorylation. Since the mitochondria described are highly concentrated, it is likely they contain thermogenin to meet the high energy demands of the cells.A: Thermogenin 