Photosynthesis Autotroph / Producer Organisms which are able to make their own energy and food. Chlorophyll – protein rich pigment found in Chloroplasts of plants Chlorophyll A and B absorb reds and blues of of sunlight and reflect green. Other Pigments: Carotenoids / Anthocyanins / Betalains Photosynthesis Photo = Light Synthesis = to make / produce / put together 6 water molecules + 6 carbon dioxide molecules using the energy from the sun make 1 glucose molecule + 6 oxygen molecules 6 H2 O + 6 C O2 > C 6 H 12 O 6 + 6 O2 Photosynthesis Light Dependent Reactions / Take place in the Granum Sunlight activates electrons in the thylakoid membranes of the chloroplast The activated electrons have enough energy to split one molecule of water (H2O). The oxygen is released into the atmosphere. The hydrogen is trapped by a substance called NADP and makes NADPH2. There is enough energy to bond a phosphate to adenosine diphosphate to make ATP. Photosynthesis Light Independent Reactions / Calvin Cycle Take place in the Stroma of the Chloroplasts Carbon dioxide is split using the energy from ATP formed in the Light dependent reactions. The Carbon attaches to a 5 carbon sugar (RuDP) which makes an unstable 6 Carbon sugar and immediately splits into two 3 Carbon compounds (PGA) (C3H5O3). The hydrogen being held by NADP~H attaches to PGA and makes PGAL (C3H6O3) Photosynthesis Two PGAL bond and form one glucose molecule. The remainder of the PGA return to make more RuDP (5 carbon compound). The reactions must occur 6 times in order for one molecule of glucose to be formed.