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- A pigment molecule in the photosystem absorbs one photon, a quantity or “packet” of light energy, at a time. A photon of light energy travels until it reaches a molecule of chlorophyll. The photon causes an electron in the chlorophyll to become “excited.”
Jul 30, 2017 · Photosynthesis Definition. Photosynthesis is the biochemical pathway which converts the energy of light into the bonds of glucose molecules. The process of photosynthesis occurs in two steps. In the first step, energy from light is stored in the bonds of adenosine triphosphate (ATP), and nicotinamide adenine dinucleotide phosphate (NADPH).
The photons in light provide the energy that drives photosynthesis. The chemical formula is the same for the two types of simple sugars produced by photosynthesis: glucose and fructose: C 6 H 12 O 6. The equation that summarizes photosynthesis is: water + carbon dioxide -> oxygen, water, and simple sugars.
Explain the relevance of photosynthesis to other living things. Identify the substrates and products of photosynthesis. Describe the main structures involved in photosynthesis. Relate the light-dependent and light-independent reactions.
Key Points. Light energy splits water and extracts electrons in photosystem II (PSII); then electrons are moved from PSII to cytochrome b6f to photosystem I (PSI) and reduce in energy. Electrons are re-energized in PSI and those high energy electrons reduce NADP + to NADPH.
A pigment molecule in the photosystem absorbs one photon, a quantity or “packet” of light energy, at a time. A photon of light energy travels until it reaches a molecule of chlorophyll. The photon causes an electron in the chlorophyll to become “excited.”
Mar 24, 2024 · Definition of Photosynthesis. Photosynthesis is the biological process by which plants, algae, and certain bacteria convert light energy into chemical energy, producing oxygen and organic compounds, primarily glucose, from carbon dioxide and water.
Learning Objectives. By the end of this section, you will be able to: Explain how plants absorb energy from sunlight. Describe how the wavelength of light affects its energy and color. Describe how and where photosynthesis takes place within a plant. How can light be used to make food?
