What stage of photosynthesis is light dependent?
Light energy is converted to chemical energy during the first stage of photosynthesis, which involves a series of chemical reactions known as the light-dependent reactions. In this article, we’ll explore the light-dependent reactions as they take place during photosynthesis in plants.
What does light dependent mean in biology?
Biology definition: Light-dependent reaction is the series of biochemical reactions in photosynthesis requiring light energy that is captured by light-absorbing pigments (such as chlorophyll) to be converted into chemical energy (ATP and NADPH).
What is the meaning of light dependent reaction?
The light-dependent reaction is a photochemical reaction taking place in the thylakoid membranes of chloroplasts, where light energy is transformed into adenosine triphosphate (ATP) and nicotinamide adenine dinucleotide phosphate (NADPH).
What are the three phases of the light-independent cycle of photosynthesis?
The light-independent reactions (also known as the Calvin cycle) can be organized into three basic stages: fixation, reduction, and regeneration (Video 13.6.
How are the light dependent and light independent phases linked?
In the light-independent reactions or Calvin cycle, the energized electrons from the light-dependent reactions provide the energy to form carbohydrates from carbon dioxide molecules. After the energy is transferred, the energy carrier molecules return to the light-dependent reactions to obtain more energized electrons.
What are the steps of light-dependent reactions?
Terms in this set (7)
- (1st Time) Energy is absorbed from the sun.
- Water is broken down.
- Hydrogen ions are transported across the thylakoid membrane.
- (2nd Time) Energy is absorbed from the sun.
- NADPH is produced from NADP+.
- Hydrogen ions diffuse through the protein channel.
- ADP becomes ATP.
What does light independent mean in biology?
Light-independent reaction (biology definition): Light-independent reaction is a series of biochemical reactions in photosynthesis not requiring light to proceed, and ultimately produce organic molecules from carbon dioxide.
Why does the light-independent phase come after the light-dependent?
The light-independent reactions are sometimes called the Calvin cycle because of the cyclical nature of the process. After the energy is transferred, the energy carrier molecules return to the light-dependent reactions to obtain more energized electrons.
What is the difference between light-dependent and light-independent reactions of photosynthesis?
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.