21. The histone(s) B) H3 D) H2B A) H1 C) H2A 22. In the stage 1 of photosynthesi

Question

21. The histone(s) B) H3 D) H2B A) H1 C) H2A 22. In the stage 1 of photosynthesis, a proton gradient is generated and ATP is synthesized. Where do protons become concentrated in the chloroplast? A) thylakoid space B) stroma D) thylakoid membrane C) inner membrane 23. How many ATP are produced by chemiosmosis for one glucose oxidation? A) 30 B) 28 D) 25 C) 26 24. Which of the following statements about the chemiosmotic theory is correct? A) Electron transfer in mitochondria is accompanied by an asymmetric release of protons on one sid of the inner mitochondrial membrane. B) It predicts that oxidative phosphorylation can occur even in the absence of an intact inner mitochondrial membrance. C) The effect of uncoupling reagents is a consequence of their ability to carry electrons through membranes. D) The membrane ATP synthase has no significant role in the chemiosmotic theory 25. Which of the following does NOT participate in the electron-transport chain of mitochondria? A) cytochrome c B) ubiquinone D) copper ion C) rhodopsin

Explanation / Answer

Answer 22. Protons become concentrated in the thylakoid space of the chloroplast.

Answer 23. ATP produced by the process of chemiosmosis for one glucose oxidation is 30.

Answer 24. Option A is correct. Electron transfer in mitochondria is accompanied by an asymmetric release of protons on one side of the inner mitochondrial membrane.

Answer 25. Rhodopsin doesn't participate in the electron transport chain of mitochondria.

Only time rhodopsin is used in energy production is through a unusual pathway in archea. Rhodopsin based phototropy occurs in archea bacteria and involves the pumping a proton across the cell membrane and leading to the development of a proton motive force, without the participation of an electron transport chain.

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