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What set of reactions uses h2o and produces O2?


What process produces O2?

Which are the light dependent reactions and the light-independent reactions?

In the light-dependent reactions, energy from sunlight is absorbed by chlorophyll and that energy is converted into stored chemical energy. In the light-independent reactions, the chemical energy harvested during the light-dependent reactions drives the assembly of sugar molecules from carbon dioxide.

What happens to oxygen released during photosynthesis?

In photosynthesis, solar energy is harvested as chemical energy in a process that converts water and carbon dioxide to glucose. Oxygen is released as a byproduct. In cellular respiration, oxygen is used to break down glucose, releasing chemical energy and heat in the process.

What is the source of oxygen gas in the atmosphere?


When oxygen is released as a result of photosynthesis it is a direct by product of?

2 replies. In photosynthesis process, light breaks water molecules by stripping water of an electron. This reaction frees both water molecules. Oxygen reacts with another free oxygen to form oxygen diatomic (O2).

What are the products of the light-dependent reactions?

The products of the light-dependent reactions, ATP and NADPH, are both required for the endergonic (def) light-independent reactions. The light-dependent reactions involve two photosystems called Photosystem I and Photosystem II.

What is the main purpose of light-dependent reactions of photosynthesis?

The overall purpose of the light-dependent reactions is to convert light energy into chemical energy. This chemical energy will be used by the Calvin cycle to fuel the assembly of sugar molecules. The light-dependent reactions begin in a grouping of pigment molecules and proteins called a photosystem.

What wavelengths of light should be used to maximize plant?

Special pigments in chloroplasts of plant cells absorb the energy of certain wavelengths of light, causing a molecular chain reaction known as the light-dependent reactions of photosynthesis. The best wavelengths of visible light for photosynthesis fall within the blue range (425–450 nm) and red range (600–700 nm).

What colors of light are most effective for photosynthesis and why?

Red light is more effective in photosynthesis because both the photosystems (PS I and PS II) absorb light of wavelengths in the red region (680 and 700 nm, respectively).

What is needed for light reactions to occur?

The light-dependent reactions use light energy to make two molecules needed for the next stage of photosynthesis: the energy storage molecule ATP and the reduced electron carrier NADPH. In plants, the light reactions take place in the thylakoid membranes of organelles called chloroplasts.