Lesson 7.9 Chemiosmosis powers ATP synthesis in the light reasons

1. Lesson 7.9Chemiosmosis powers ATP synthesis in the light reasons Jill G. Jordan D. Missy F. Jeremiah J.

2. Chemiosmosis powers ATP synthesis in the light reasons 1. Chemiosmosis has to do with the understood energy that is produced from this equation that powers the plant with ATP. A. Process is analogous with that of cellular respiration’s electron transport system. I. Remember that the ATP synthase is powered by the concentration gradient of hydrogen ions across the membrane II. The ions are pumped in the opposite direction this time. This means they are pumped to the low concentration intermembrane space also called the stroma in plants

3. 2. How it works A. You learn the path of electrons in chloroplasts by studying its ETC with all the photosystems and such B. This process creates the concentration gradient that drives chemiosmosis, the passing of H+ from high to low concentration through ATP synthase C. When the electrons go down the ETC, this energy creates an opportunity for a H+ ion to pass through the membrane unfaciltated D. To create the mass amounts of ATP, remaining H+ molecules in the thylakoid interior are shot through ATP synthase and into the stroma with ATP synthase

4. + Stroma (low H+ concentration) H+ ATP H+ ADP + P NADP+ NADPH Light + Light H+ Thylakoid membrane H+ H+ H+ H+ H20 H+ Electron Transport Chain H+ H+ H+ 2 + O2 ATP Synthase 1/2 H+ Photosystem I Photosystem II H+

5. Oxidative Phosphorylation Photophosphorylation • Located in the thylakoid membrane of the chloroplast • Located along the cristae in the mitochondria • Hydrogen ions are pumped across the membrane from the stroma to the thylakoid space • Hydrogen ions are pumped across the membrane from the intermembrane space into the mitochondrial matrix • Chemiosmosis occurs in both processes to generate ATP • Chemiosmotic production of ATP is called photophosphorylation • Chemisomotic production of ATP is called oxidative phosphorylation • Use the potential energy of a concentration gradient of hydrogen ions • Initial energy input to produce ATP is light energy • Initial energy input to produce ATP is glucose • Chloroplast transforms light energy into chemical energy of ATP • ATP synthase is present in both processes and is driven by the concentration gradient of hydrogen ions • Mitochondria transfer chemical energy from food into ATP • Final electron acceptor is NADP+ where they are stored at a high state of potential energy in NADPH • Final electron acceptor is oxygen where they are stored at a low energy level in water • Product of both processesare ATP • ATP and NADPH produce during this process are used in the Calvin Cycle, the next process

6. Oxidative Phosphorylation Photophosphorylation • Located in the thylakoid membrane of the chloroplast • Located along the cristae in the mitochondria • Hydrogen ions are pumped across the membrane from the stroma to the thylakoid space • Hydrogen ions are pumped across the membrane from the intermembrane space into the mitochondrial matrix • Chemiosmosis occurs in both processes to generate ATP • Chemiosmotic production of ATP is called photophosphorylation • Chemisomotic production of ATP is called oxidative phosphorylation • Use the potential energy of a concentration gradient of hydrogen ions • Initial energy input to produce ATP is light energy • Initial energy input to produce ATP is glucose • Chloroplast transforms light energy into chemical energy of ATP • ATP synthase is present in both processes and is driven by the concentration gradient of hydrogen ions • Mitochondria transfer chemical energy from food into ATP • Final electron acceptor is NADP+ where they are stored at a high state of potential energy in NADPH • Final electron acceptor is oxygen where they are stored at a low energy level in water • Product of both processesare ATP • ATP and NADPH produce during this process are used in the Calvin Cycle, the next process

7. Oxidative Phosphorylation Photophosphorylation • Located in the ________________membrane of the chloroplast • Located along the _________in the mitochondria • Hydrogen ions are pumped across the membrane from the ________to the_________ _____________ • Hydrogen ions are pumped across the membrane from the _______________space into the mitochondrial __________ • _______________occurs in both processes to generate ATP • Chemiosmotic production of ATP is called____________________ • Use the ____________energy of a concentration gradient of hydrogen ions • Chemisomotic production of ATP is called__________ _________________ • Initial energy input to produce ATP is ___________ energy • Initial energy input to produce ATP is ____________ • Chloroplast transforms light energy into chemical energy of ATP • _______ ______________is present in both processes and is driven by the concentration gradient of hydrogen ions • Mitochondria transfer chemical energy from food into ATP • Final electron acceptor is ________ where they are stored at a ______state of potential energy in NADPH • Product of both processesare ATP • Final electron acceptor is __________where they are stored at a ______energy level in water • ATP and NADPH produce during this process are used in the _________Cycle, the next process