Step 4-Light Dependent. Jessica Pamment of DePaul University explains the steps of photosynthesis from the light reactions, inclusive of Photosystem II and I and chemiosmosis, to the Calvin Cycle in the light-independent reactions. 3. Photosynthesis is a multi-step process that requires sunlight, carbon dioxide, and water as substrates. The primary reactions of photosynthesis depend upon the availability of light and therefore it is called the light reactions or photochemical reactions. Start studying Steps of Photosynthesis. The oxgyen is then given away as a gas and the hydrogen becomes part of the glucose that the plant produces! Calvin cycle. the main steps in photosynthesis is sunlight,a plant,and oxygen or carbon dixiode 1. During the steps in the light reaction stage, energy from the sun converts into chemical energy, while the Calvin cycle brings carbon dioxide fixation. The light-dependent reaction takes place within the thylakoid membrane and requires a steady stream of sunlight, hence the name light-dependent reaction. CO2 and H2O enter the leaf. Step 1: The plant gathers sunlight from the chlorophyll in the cells to convert into energy. 2, the sunlight gives energy to the plant to start making food. Photosynthesis is a chemical process in plants which converts light energy to chemical energy. The visible light seen by humans as white light actually exists in a rainbow of colors. 2. Through a subsequent series of steps (that just happen to not require light), hydrogen atoms from NADPH are combined with carbon dioxide from the air to produce glucose a simple sugar. The electrons move down the e- transport chain (ETC) Step 2. 3, the roots suck nutrients to the leaves. 2. 4. And these two stages, we can call the light-dependent reactions. The chemical energy contained in these two molecules is used in the next step of photosynthesis to construct carbohydrates. Chlorophyll is a key molecule for photosynthesis, though other cartenoid pigments also participate. Photosynthesis consists of two stages, the light reactions, and the dark reactions. This starts when photons from sunlight strike the leaf, excite the chlorophyll (the light absorbing pigment that drives photosynthesis) and activate electrons. Light falls on the chlorophyll of grana inside the chloroplast , some electrons in the atoms of chlorophyll will gain energy , these excited electrons are shifted up from their low-energy levels to the higher ones .. Step 1. *Response times vary by subject and question complexity. During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds. STUDY. 3. this energy is then used to split water molecules from the soil into hydrogen and oxygen. Photosynthesis is not a single chemical reaction, but rather a set of chemical reactions. Median response time is 34 minutes and may be longer for new subjects. We would have trouble breathing if this was not a bi-product of photosynthesis. The leaves are made up of very small cells. Stage One: Light Reactions In the light-dependent process, which takes place in the grana, the stacked membrane structure within chloroplasts, the direct energy of light helps the plant to make molecules that carry energy for utilization in the dark phase of photosynthesis. CO2 molecules are added to five carbon molecules in the Calvin Cycle which create six carbon molecules. But it can be summarized like this: Carbon dioxide, water and light go in. Photosynthesis is defined as one process, but contains two distinct stages, which in turn break down into a series of steps. 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