by plants as a final electron acceptor for photosynthesis d

Cyclic photophosphorylation occurs less commonly in plants than noncyclic photophosphorylation in plants, probably when there is too little NADP+ available. It is also seen in certain photosynthetic bacteria. Cyclic photophosphorylation involves only Photosystem I and generates ATP but not NADPH. As the electrons from the reaction center of Photosystem I are picked up by the electron transport chain, they are transported back to the reaction center chlorophyll. As the electrons are transported down the electron transport chain, some of the energy released is used to pump protons across the thylakoid membrane from the stroma of the chloroplast to the thylakoid interior space producing a proton gradient or proton motive force. As the accumulating protons in the thylakoid interior space pass back across the thylakoid membrane to the stroma through ATP synthetase, this energy is used to generate ATP from ADP and Pi.

that the final electron acceptor of photosynthesis is ..

A shows aerobic respiration, because O2 is the terminalelectron acceptor; B shows anaerobic respiration because NO3- is the terminalelectron acceptor.b) What is the function of the molecules labeled "Q"? As they acceptelectrons from one the previous electron carrier and give them up to thenext carrier, quinone molecules also move protons across the membrane,outside the cell.


In the last video we learned a little bit about photosynthesis

Identify the parts of the chloroplast and what phase of photosynthesis occurs in which organelles CLE 3210.3.3 Investigate the ..

Cyclic photophosphorylation occurs less commonly in plants than noncyclic photophosphorylation, most likely occurring when there is too little NADP+ available. It is also seen in certain photosynthetic bacteria. Cyclic photophosphorylation involves only Photosystem I and generates ATP but not NADPH. As the electrons from the reaction center of Photosystem I are picked up by the electron transport chain, they are transported back to the reaction center chlorophyll. As the electrons are transported down the electron transport chain, some of the energy released is used to pump protons across the thylakoid membrane from the stroma of the chloroplast to the thylakoid interior space producing a proton gradient or . As the accumulating protons in the thylakoid interior space pass back across the thylakoid membrane to the stroma through ATP synthetase complexes, this energy is used to generate ATP from ADP and Pi (see Fig. 4).