Questions 18-21 are based on the electron transport chain figure shown above. Wh

Question

Questions 18-21 are based on the electron transport chain figure shown above. What is the species labeled #1 in this figure? a) CoQ b) an electron c) NADH d) a proton The number "2" represents the final chemical product produced by the electron transport chain. What species is this a) NADH b) H_2O c) O_2 d) FADH_2 How does ATP synthase generate ATP (product #3)? a) Light is absorbed by chlorophyll and the energy is transferred to ADP and P_ b) The electrons from NADH are used to reduce ADP and P_ c) The energy released by the movement of protons across the inner membrane is coupled to ATP synthesis d) A phosphate group is transferred to ADP from another chemical species in the mitochondria Which compartment of the mitochondrion is labeled by #4? a) Matrix b) Intermembrane space c) Stroma d) Inner membrane

Explanation / Answer

Electron transport chain transfers electrons from electron donors to the ones who accept via series of oxidation reduction reactions , coupled with transfer of protons that release energy for the production of energy rich molecules ATP.

Ans 18 d. A proton

Ans 19 . B. H2O

Ans 20. C. The energy released by the movement of protons across the inner membrane is coupled to ATP synthesis

Ans 21. A. Matrix

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