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Transform light energy to chemical engergy stored in the bonds of sugar they make from carbon dioxide and water
Organisms that make their own food and thus sustain themselves without consuming organic molecules derived from any other organisms
Organisms that produce organic molecules from inorganic molecules using the energy of light
A light-absorbing pigment in the chloroplasts that plays a central role in the chloroplasts
Consists of Carbon fixation, reduction, release of G3P, and regeneration of RuBP. Using carbon from CO2, electrons from NADPH, and energy from ATP, the cycle constructs G#P, which is used to build glucose and other organic molecules
Consists of a number of light-harvesting complexes surrounding a reaction center complex
Reaction center complex
Contains a pair of chlorophyll a molecules and a molecule called the primary electron acceptor, which is capable of accepting electrons and becoming reduced
Rubisco combines CO2 with a five-carbon sugar called ribulose bisphosphate (RuBP). The unstable product splits into two molecules of the three-carbon organic acid, 3-phosphoglyceric acid (3-PGA). For three CO3 entering, six 3-PGA result
Two chemical reactions consume energy from six molecules of ATP and oxidize six molecules of NADPH. Six molecules of 3-PGA are reduced, producing six molecules of G3P
Release of one molecule of G3P
One molecule of G3P you see leaving the cycle is the net product of photosynthesis. A plant cell uses G3P to make glucose and other organic compounds
Regeneration of RuBP
A series of chemical reactions uses energy from ATP to rearrage the atoms in the five G3P molecules (15 carbons total), forming three RuBP molecules (15 carbons). These can start another turn of the cycle
First organic compound produced is the three-carbon compound 3-PGA.Common and widely distributed; they include soy beans, oats, wheat and rice.
Alternate modes of carbon fixation have evolved that save water without shutting down photosynthesis. Preced the Calvin cycle by first fixing CO2 into a four-carbon compound. Keeps its stromata mostly closed
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