light absorption
Light-dependent reactions are in the thylakoid membrane inside the chloroplasts. Light-dependent reactions need light energy and are the first step of photosynthesis.
The first stage of photosynthesis is called the 'Light Dependant' stage or the photolysis of water. this is when light enters the cell and splits water into hydrogen and oxygen. The oxygen is then released into the atmosphere and the hydrogen is picked up by the hydrogen acceptor NADP becoming reduced NADPH2 which is then used for the next stage of photosynthesis.
Plants need photons in order to photosynthesize. There are photons which we cannot see, such as UV rays, but most plant energy comes from light which we can see. Also, remember that different plants absorb different kinds of light.
It is the first phase. The light dependent reaction.
Photosynthesis consists of two stages: a series of light-dependent reactions that are temperature independent and a series of temperature-dependent reactions that are light independent. The rate of the first series, called the light reaction, can be increased by increasing light intensity (within certain limits) but not by increasing temperature. In the second series, called the dark reaction, the rate can be increased by increasing temperature (within certain limits) but not by increasing light intensity.
light absorption
Excitation of electrons in photosystem II.
Light-dependent reactions are in the thylakoid membrane inside the chloroplasts. Light-dependent reactions need light energy and are the first step of photosynthesis.
The light dependent and the light independent reactions.
The light-dependent reactions, or light reactions, are the first stage of photosynthesis. In this process light energy is converted into chemical energy, in the form of the energy-carriers ATP and NADPH. In the light-independent reactions, the formed NADPH and ATP drive the reduction of CO2 to more useful organic compounds, such as glucose.
This is called the light phase oh photosynthesis as opposed to the dark phase. During the light phase, photons excite enzymes on the thylakoid. Also can be known as Light-Dependent Reactions
Photosynthesis is performed in two stages:Light reactions (or light-dependent reactions): Energy from sunlight is required.Dark reactions (or light-independent reactions): No sunlight is required. However, energy formed by the light-dependent reactions is needed.
light dependant reactions
Differences: >light reactions occur in the thykaloid membranes, but dark occur in stroma >light reactions are light dependent, or they need light to take place, whereas dark reactions don't > dark reactions use the products of the light reactions >light reactions are the first step of photosynthesis and dark reactions are the second step Similarities: >both in photosynthesis Thats really the only similarity!!! hope this helps :)
Photosynthesis happens in two stages, also called reactions. The first stage is the light-dependent stage. In this stage light energy is absorbed by chlorophyll and converted into chemical energy, and water is split to produce hydrogen. The unwanted oxygen from the water is released. The second stage is the light-independent stage. In this stage the chemical energy and the hydrogen from the first stage are used to convert carbon dioxide into carbohydrates, such as glucose. More details can be found on this site by searching for photosynthesis.
The first stage of photosynthesis is called the 'Light Dependant' stage or the photolysis of water. this is when light enters the cell and splits water into hydrogen and oxygen. The oxygen is then released into the atmosphere and the hydrogen is picked up by the hydrogen acceptor NADP becoming reduced NADPH2 which is then used for the next stage of photosynthesis.
Light Dependant Reactions