Photosynthesis

 Occurs within the chloroplasts of plant cells, and in daylight hours.

Photosynthesis  Occurs within the chloroplasts of plant cells, and in daylight hours.  Water and Carbon Dioxide are joined to produce the sugar glucose – oxygen is a waste product.  Occurs within the chloroplasts of plant cells, and in daylight hours.  Water and Carbon Dioxide are joined to produce the sugar glucose – oxygen is a waste product.

Light-dependent reaction (1 st pathway)  Takes place on the thylakoid membranes of the grana of chloroplasts.

Light-dependent reaction (1 st pathway)  Takes place on the thylakoid membranes of the grana of chloroplasts.  Chlorophyll embedded in the thylakoid membrane have their electrons ‘excited’ by solar energy.  Takes place on the thylakoid membranes of the grana of chloroplasts.  Chlorophyll embedded in the thylakoid membrane have their electrons ‘excited’ by solar energy.

Light-dependent reaction (1 st pathway)  Takes place on the thylakoid membranes of the grana of chloroplasts.  Chlorophyll embedded in the thylakoid membrane have their electrons ‘excited’ by solar energy.  These high-energy electrons are passed along several carrier molecules and their energy is used to make ATP from ADP.  Takes place on the thylakoid membranes of the grana of chloroplasts.  Chlorophyll embedded in the thylakoid membrane have their electrons ‘excited’ by solar energy.  These high-energy electrons are passed along several carrier molecules and their energy is used to make ATP from ADP.

Light-dependent reaction (1 st pathway)  Takes place on the thylakoid membranes of the grana of chloroplasts.  Chlorophyll embedded in the thylakoid membrane have their electrons ‘excited’ by solar energy.  These high-energy electrons are passed along several carrier molecules and their energy is used to make ATP from ADP.  The electrons are then returned to the chlorophyll.  Takes place on the thylakoid membranes of the grana of chloroplasts.  Chlorophyll embedded in the thylakoid membrane have their electrons ‘excited’ by solar energy.  These high-energy electrons are passed along several carrier molecules and their energy is used to make ATP from ADP.  The electrons are then returned to the chlorophyll.

Light-dependent reaction (1 st pathway)  Water is split into hydrogen and oxygen – oxygen is not required so is released as O2 gas.

Light-dependent reaction (1 st pathway)  Water is split into hydrogen and oxygen – oxygen is not required so is released as O2 gas.  Hydrogen is picked up by carrier molecules (NADP) and taken to the second pathway.  Water is split into hydrogen and oxygen – oxygen is not required so is released as O2 gas.  Hydrogen is picked up by carrier molecules (NADP) and taken to the second pathway.

Light-independent reaction (2 nd pathway)  Also known as the Calvin cycle and occurs in the liquid matrix of the chloroplast – the stroma.

Light-independent reaction (2 nd pathway)  Also known as the Calvin cycle and occurs in the liquid matrix of the chloroplast – the stroma.  CO2 and H enter a complex cycle and are passed around it. Rearrangement happens and C6H12O6 is formed as the final product.  Also known as the Calvin cycle and occurs in the liquid matrix of the chloroplast – the stroma.  CO2 and H enter a complex cycle and are passed around it. Rearrangement happens and C6H12O6 is formed as the final product.

Light-independent reaction (2 nd pathway)  Also known as the Calvin cycle and occurs in the liquid matrix of the chloroplast – the stroma.  CO2 and H enter a complex cycle and are passed around it. Rearrangement happens and C6H12O6 is formed as the final product.  The molecules that form the cycle are NOT used up – CO2 and H are continuously fed in.  Also known as the Calvin cycle and occurs in the liquid matrix of the chloroplast – the stroma.  CO2 and H enter a complex cycle and are passed around it. Rearrangement happens and C6H12O6 is formed as the final product.  The molecules that form the cycle are NOT used up – CO2 and H are continuously fed in.

Light-independent reaction (2 nd pathway)  Also known as the Calvin cycle and occurs in the liquid matrix of the chloroplast – the stroma.  CO2 and H enter a complex cycle and are passed around it. Rearrangement happens and C6H12O6 is formed as the final product.  The molecules that form the cycle are NOT used up – CO2 and H are continuously fed in.  ATP produced in the1st pathway is used to run this cycle.  Also known as the Calvin cycle and occurs in the liquid matrix of the chloroplast – the stroma.  CO2 and H enter a complex cycle and are passed around it. Rearrangement happens and C6H12O6 is formed as the final product.  The molecules that form the cycle are NOT used up – CO2 and H are continuously fed in.  ATP produced in the1st pathway is used to run this cycle.

Word & Chemical equation for photosynthesis  Carbon dioxide + water –-- solar energy ---  Glucose + Oxygen  6CO H 2 O – C 6 H 12 O 6 + 6O 2  Carbon dioxide + water –-- solar energy ---  Glucose + Oxygen  6CO H 2 O – C 6 H 12 O 6 + 6O 2

Word & Chemical equation for photosynthesis  Carbon dioxide + water –-- solar energy ---  Glucose + Oxygen  6CO H 2 O – C 6 H 12 O 6 + 6O 2  The glucose produced is - stored as insoluble starch - Used in respiration  Carbon dioxide + water –-- solar energy ---  Glucose + Oxygen  6CO H 2 O – C 6 H 12 O 6 + 6O 2  The glucose produced is - stored as insoluble starch - Used in respiration

Word & Chemical equation for photosynthesis  Carbon dioxide + water –-- solar energy ---  Glucose + Oxygen  6CO H 2 O – C 6 H 12 O 6 + 6O 2  The glucose produced is - stored as insoluble starch -Used in respiration -Used to make other organic chemicals needed (fats, amino acids, cellulose)  Carbon dioxide + water –-- solar energy ---  Glucose + Oxygen  6CO H 2 O – C 6 H 12 O 6 + 6O 2  The glucose produced is - stored as insoluble starch -Used in respiration -Used to make other organic chemicals needed (fats, amino acids, cellulose)