Detailed Instructions: In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
Q: The UCP1 protein found in some of these structures can be activated by beta-3 adrenergic signalling cascades. Defects in this structure can cause conditions such as Leigh's disease and MELAS syndrome. The hydrogen hypothesis is a model for the evolutionary development of this structure while Peter Mitchell's chemiosmotic theory explains its function. These organelles contain numerous infoldings called cristae as well as a viscous matrix. For 10 points, name this maternally inherited organelle, the so called powerhouse of the cell.
A:
Science