Answer :
B. Mitochondria. A membrane-bound organelle that makes energy available to the rest of the cell
Answer:
The correct answer is B. mitochondria.
Mitochondria is a double membrane-bound cell organelle found in most of the eukaryotic cells.
It is also called the powerhouse of the cell as the main function of this organelle is to synthesize adenosine triphosphate (ATP, the energy currency of the cell) by the process of cellular respiration.
The major sets of reactions (excluding glycolysis) of cellular respiration take place in mitochondria. For instance, pyruvate dehydrogenase complex reactions and Krebs cycle take place in mitochondria.
NADH and FADH₂ synthesized from these reactions donate electrons to the electron transport chain placed in the inner membrane of the mitochondria.
This chain produces chemiosmosis which powers the ATP synthase (in the inner mitochondrial membrane) to add a phosphate group to ADP and thus producing ATP.
