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16. Coupling of the reaction centers of oxidative phosphorylation is achieved by which one of the following? (1) Making a complex of all four reaction centers. (2) Locating all four […]

15. From the following statements: A. Biosynthesis of proteins and nucleic acids from precursors results in production of chemical energy in the form of ATP. NAOH. NADPH and FADH2 B. […]

14. Among the following which chemical inhibits the mitochondrial electron transport chain- (1) Streptomycin       (2) Nystatin (3) Azides                (4) Penicillin   The mitochondrial electron transport chain (ETC) is essential for […]

13. Which of the following proteins acts as an energy transducer? (1) G-protein. (2) Bacteriorhodopsin. (3) Hemoglobin. (4) Heat shock protein.   Energy transducers are proteins that convert one form […]

12. Electron transfer from donors such as NADH and FADH2 to O2 occurs in (1) membranes of ER, chloroplast and mitochondria (2) chloroplast only (3) mitochondria only (4) organellar membranes […]

11. Proton motive force during oxidative phosphorylation is generated in mitochondria by (1) exchanging protons for sodium ions (2) pumping protons out into intermembrane space (3) pumping hydroxyl ions into […]

10. In prokaryotes, the terminal electron acceptor in anaerobic conditions are generally (1) Glucose, fructose,  maltose (2) Fatty acids (3) SO42-,  NO32- , S (4) Antioxidants such as Vitamin K […]

9. Iron-sulphur clusters (Fe-S) are the key prosthetic groups that carry electrons in of the below EXCEPT. (1) NADH – CoQ reductase (2) Succinate – CoQ reductase (3) Cytochrome c […]

8. NADH donates its electron to electron transport chain through primary acceptor (1) CoQ          (2) FMN (3) FAD          (4) Cytochrome oxidase   NADH is a crucial electron carrier in cellular […]

7. In mitochondria the enzymes of electron transport chain are located at (1) Outer membrane (2) Inter membrane space (3) Inner membrane (4) Matrix   The electron transport chain (ETC) […]