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.

Which of the following is not a characteristic of a hydrogen bond? 1. it is responsible for the unusual physical properties of water. 2. it is weaker than a covalent bond. 3. it is stronger than other dipole-dipole interactions. 4. it can occur when hydrogen is covalently bound to very electronegative elements liks f, cl, br and i.