Α-ketoglutarate dehydrogenase is a multi-enzyme complex analogous to: a. pyruvate kinase. b. glyceraldehyde-3-phosphate dehydrogenase. c. isocitrate dehydrogenase. d. pyruvate dehydrogenase. e. lactate dehydrogenase.

Although respiratory organs vary across different organisms, they all contain respiratory surfaces that have a large surface area and are extremely thin. explain why having an extremely thin respiratory surface with a large surface area is advantageous for the process of gas exchange