An organism that cannot make its own food but relies on other organisms for their energy
The process where green plants and algae absorb the sun's energy and convert it into stored chemical energy
Proved that plants needed something in the air to continue growing. That something was oxygen.
Repeated experiments and found that the oxygen in the air was replenished only when plants were exposed to sunlight.
Light Dependent Reactions of Photosynthesis (this will be fill-in-the-blank...and may not look exactly like this!)
*Photosystem II absorbs sunlight and energizes a couple of electrons.
*This takes place in the thylakoid membranes of the chloroplast.
*As electrons gain energy, they are passed down the Electron Transport Chain (ETC).
*To replace lost electrons, water molecules are broken apart into their chemical parts. The oxygens (O) are released into the environment. The hydrogen ions (H+) are pumped across to the inner thylakoid membrane. The electrons (e-) are sent down the ETC.
*As the electrons move down the ETC they lose energy. They are re-energized by sunlight when they reach Photosystem I.
*When electrons reach the end of the ETC, they are joined with NADP+ and H+ to form NADPH.
*While electrons travel down the chain, they create enough energy to shoot hydrogen ions to the inner thylakoid space. This causes a concentration gradient to occur.
*Since the hydrogen ions cannot come back across the membrane without help, they use ATP synthase to bring them back to the stroma. As ATP synthase spins, it creates enough energy to bond an ADP and phosphate together creating ATP.
*The ATP and NADPH will be used in the Light-Independent Reactions.
Light-Independent Reactions (Calvin Cycle)
(this will be fill-in-the-blank)
*Six carbon dioxide (CO2) molecules diffuse into the stroma of the chloroplat and attach to 6 5-carbon sugars already in the stroma.
*This creates six 6-carbon molecules that are very unstable and quickly break apart to form 12 3-carbon molecules.
*ATP and NADPH give the energy necessary to perform these reactions.
*Two of the 12 3-carbon molecules are removed from the cycle and are used to form sugars, lipids, amino acids, and other organic molecules.
The remaining 10 3-carbon molecules are converted back into six 5-carbon molecules and are recycled so the process can continue.