Where are we going with this? The information on this page should increase understanding related to this standard: Understand how photosynthesis turns light energy into chemical energy.
Let's think about this a little more scientifically… Food is energy for living organisms. And… the Law of Conservation says that energy cannot be created or destroyed. It can change form… but… It can't just show up out of nowhere.
- The main goal of photosynthesis is to build sugars (most commonly glucose).
- It uses light to create glucose and oxygen.
- In other words, photosynthesis converts light energy into chemical energy.
- light dependent (also called the light reactions)
- light independent (also called the Calvin cycle or dark reactions)
Light Independent Reactions require ATP and NADPH; so, Light Dependent Reactions have to happen first so that those molecules can be created.
The light reaction begins (by taking in the reactants light, H2O, NADP+, ADP, and P).ATP, Oxygen, NADPH are produced (and passed to the dark reaction).The Dark reaction begins (by taking in the reactants ATP, NADPH, and CO2).Sugar, ADP, P, and NADP+ are produced (and go back to be reused by the light dependent reactions).
More specifically, electrons are small negatively charged parts of atoms. They can take in energy and be "excited," move from atom to atom, release energy… suffice to say that they are integral parts of chemical reactions.
- Photosynthesis requires water, CO2, and light.
- Photosynthesis makes glucose and oxygen.
- Photosynthesis happens in the chloroplast.
- Thylakoid = single flattened sac
- Granum = stack of thylakoids
- Photosynthesis has two main steps: light dependent and light independent reactions
- NADPH is the electron carrier in photosynthesis
- P stands for Photosynthesis