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- Light-dependent reactions, which take place in the thylakoid membrane, use light energy to make ATP and NADPH. In the process, water is used and oxygen is produced. Energy from ATP and NADPH are used to power the Calvin cycle, which produces GA3P from carbon dioxide. ATP is broken down to ADP and Pi, and NADPH is oxidized to NADP +.
bio.libretexts.org/Courses/Gettysburg_College/01:_Ecology_for_All/25:_Light_and_Photosynthesis
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.
- 25: Light and Photosynthesis - Biology LibreTexts
The light reactions of photosynthesis liberate oxygen, and...
- 5.2: The Light-Dependent Reactions of Photosynthesis
In the light-dependent reactions, energy absorbed by...
- 25: Light and Photosynthesis - Biology LibreTexts
The light reactions of photosynthesis liberate oxygen, and more oxygen dissolves in the cytosol of the cell at higher temperatures. Therefore, high light intensities and high temperatures (above ~ 30°C) favor the second reaction and result in photorespiration.
Sep 21, 2021 · In the light-dependent reactions, energy absorbed by sunlight is stored by two types of energy-carrier molecules: ATP and NADPH. The energy that these molecules carry is stored in a bond that holds a single atom to the molecule. For ATP, it is a phosphate atom, and for NADPH, it is a hydrogen atom.
The reactions that make up the process of photosynthesis can be divided into light-dependent reactions, which take place in the thylakoids, and light-independent reactions (also known as dark reactions or the Calvin cycle), which take place in the stroma.
Jul 6, 2024 · Light Reactions Overview. The light reactions of photosynthesis are the initial phase where light energy is captured and converted into chemical energy. This process takes place in the thylakoid membranes of the chloroplasts, where pigment molecules like chlorophyll absorb photons.
Light energy enters the process of photosynthesis when pigments absorb the light. In plants, pigment molecules absorb only visible light for photosynthesis. The visible light seen by humans as white light actually exists in a rainbow of colors.
Light-dependent reactions are certain photochemical reactions involved in photosynthesis, the main process by which plants acquire energy. There are two light dependent reactions: the first occurs at photosystem II (PSII) and the second occurs at photosystem I (PSI).
