Photosynthesis Photosynthesis Occurs within the chloroplasts of plant

Photosynthesis

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.

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.

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.

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.

Light-dependent reaction (1 st pathway) Water is split into hydrogen and oxygen – oxygen is not required so is released as O 2 gas.

Light-dependent reaction (1 st pathway) Water is split into hydrogen and oxygen – oxygen is not required so is released as O 2 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. CO 2 and H enter a complex cycle and are passed around it. Rearrangement happens and C 6 H 12 O 6 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. CO 2 and H enter a complex cycle and are passed around it. Rearrangement happens and C 6 H 12 O 6 is formed as the final product. The molecules that form the cycle are NOT used up – CO 2 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. CO 2 and H enter a complex cycle and are passed around it. Rearrangement happens and C 6 H 12 O 6 is formed as the final product. The molecules that form the cycle are NOT used up – CO 2 and H are continuously fed in. ATP produced in the 1 st pathway is used to run this cycle.

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

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

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