The oxygen released by photosynthesis comes from: a . CO2 b. H2 O c. light. d. NADPH. e. elect

step 1 So if we write down the chemical reaction for photosynthesis, we have CO2, carbon dioxide, plus

The oxygen released by photosynthesis comes from: a . CO2...

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Key Concepts

Photosynthesis

Photosynthesis is the process by which plants, algae, and certain bacteria convert light energy into chemical energy. It uses water and carbon dioxide to produce glucose and oxygen. This process is fundamental to life on Earth since it forms the base of the food chain and produces the oxygen needed for respiration.

Light-dependent Reactions

The light-dependent reactions take place in the thylakoid membranes of chloroplasts. In these reactions, light energy is captured by chlorophyll to drive the splitting of water molecules (photolysis), generate high-energy electrons, and create ATP and NADPH, which are essential for the subsequent synthesis of sugars.

Photolysis of Water

Photolysis of water is the process by which water molecules are split into oxygen, protons, and electrons using light energy during photosynthesis. This mechanism is crucial because it provides the electrons needed to power the electron transport chain and releases oxygen as a byproduct, which is expelled into the atmosphere.

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