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Can the light dependant reactions occur without the light independent reactions?
No, the light-dependent reactions in photosynthesis cannot occur without the light-independent reactions. The light-dependent reactions, which take place in the thylakoid membranes of chloroplasts, require light energy to produce ATP and NADPH. These molecules are then used in the light-independent reactions (Calvin cycle) to convert carbon dioxide into glucose. Thus, both sets of reactions are interdependent and necessary for the complete process of photosynthesis.
Why is the second stage of photosynthesis called light independent reaction?
The light-independent reactions are sometimes referred to as the dark reactions, though that term may be misleading as they do not actually require darkness to proceed. The term "light-independent" is used to emphasize that the reactions occur regardless of the amount of light present as long as the proper substrate compounds are available. Even this term can be criticized, however, as the availability of substrates in plants depends on photosynthesis, so the reactions cannot be said to be entirely "light-independent." Furthermore, the term "dark reactions" may be more accurate in CAM (Crassulacean acid metabolism) plants, which only take up CO2, which is necessary for the reactions to proceed, at night.http://en.wikipedia.org/wiki/Light-independent_reaction
What happens when you manipulate plant growth by growing plants in the dark?
Plants do grow in the "dark." There are 2 phases to photosynthesis: a light phase and a dark phase. The dark phase does not necessarily mean it happens in the dark but it CAN occur during the dark. It is the metabolism of the compounds made during the light phase, the phase requiring sunlight, of photosynthesis. Plants held in the dark too long build up cell compounds from the normal cellular pathways and create a situation called "inhibition" in which the accumulation of the cellular metabolics, the by-product, build until it causes the cell to stop normal functioning and either dies or must alter the chemistry in a manner to move those by-products out of the cell.
What is the importance of light in photosynthesis?
The equation of photosynthesis is as below:Carbon dioxide + Water ---------> Glucose + OxygenThis reaction takes place in the presence of light and chlorophyll.The process of photosynthesis is completed in two stages:-Light Reactions: When light falls on leaves, it is absorbed by the chlorophyll in the chloroplasts. The solar energy is utilized to split water into oxygen and hydrogen, this process is called photolysis, and oxygen is released during this process. As these reactions take place only in the presence light, they are called light reactions.During light reactions two compounds are formed when solar energy is converted into chemical energy, these are:NADPH (Nicotinamide Adenine Di-nucleotide Phosphate)ATP (Adenosine Tri-Phosphate)NADP already exists in the cells of the leaf. The hydrogen released on the photolysis of water molecule is accepted by this compound and it becomes reduced to form NADPH.NADP (in cell) + H (from water) ---------> NADPHThis reaction takes place in the presence of light and enzymes.The compound ADP (Adenosine Di-Phosphate) is already present in the cells of the leaf and combines with the phosphate group using light energy to form a compound called ATP.ADP + P ---------> ATPThis reaction also takes place in the presence of light and enzymes.These compounds are energy rich and are needed for the dark reactions in photosynthesis.Dark Reactions: Utilizing the energy from ATP and the hydrogen from NADPH, water combines with carbon dioxide to form carbohydrates. Thus, the solar energy is now converted into chemical energy to form glucose. Other organic compounds are further synthesized from this glucose.This stage is also completed in a series of chemical reactions with the help of enzymes . Scientists have discovered an interesting thing about these two stages: only the first requires light, and the second can occur in the dark. So we call these reactions light and dark reactions respectively. Neither light energy nor chlorophyll are required for the dark reactions.Various steps of the dark reactions were studied by a scientist named Melvin Calvin, thus dark reactions are also known as Calvin's Cycle. When scientists performed experiments with chlorella plant, they found the rate of photosynthesis increased in non-continuous supply of light and again if the temperature is raised during dark reactions, the rate increases invariably. This also proved that light reactions are photochemical reactions which involve light, and dark reactions are chemical reaction which do not involve light.
How long does it take for your eyes to adjust to the dark?
It typically takes about 20-30 minutes for your eyes to fully adjust to the dark. During this time, your pupils dilate to let in more light, allowing you to see better in low-light conditions.
Chloroplasts can make carbohydrates in the dark if they are provided with enough chemical energy in the form of ATP and?
NADPH, which are produced during the light reactions of photosynthesis. This process is known as the Calvin cycle, which can occur in the absence of light as long as these energy molecules are available.
How are Light and Dark reaction the reverse of each other?
Light reactions require light to fix photons into Redox molecules. These are temporary, and to fix this energy for long term storage, the plants use the 'dark reactions' such as the Calvin cycle. It is sort of a misnomer, because they don't HAVE to occur in the dark, just that they don't require light.
What is gap time among light reaction and dark reaction?
Gap time between the light reactions and the dark reactions (Calvin cycle) in photosynthesis refers to the period when the products of the light reactions, namely ATP and NADPH, are generated and utilized. While the light reactions occur in the thylakoid membranes of chloroplasts, producing energy carriers using sunlight, the dark reactions take place in the stroma, relying on these energy carriers to fix carbon dioxide into glucose. Although the two processes are interconnected, they can occur at different times, with the dark reactions being able to utilize the products of light reactions even when light is not present, as long as the necessary substrates are available. However, in a typical day-night cycle, the gap time is minimal, as the dark reactions are dependent on the immediate availability of ATP and NADPH produced during the light reactions.
The dark reaction phase of photosynthesis occurs even without light as long as there suffcien supply of light reaction t lo?
The light reaction makes two substances needed by the dark reaction: ATP and NAPH. As long as these two substances are available the dark reaction can continue, even in the absence of light. However when they run out more light is needed to replace them.
Why is the Dark Reaction sometimes called Light Independent Reaction?
Because the dark reactions are CO2 assimilation's and do not need light energy. They use the ATP and NADPH created from the light reactions to convert CO2 to carbohydrates, so this can happen in the "dark" as long as the light reactions already happened.
Can the light dependant reactions occur without the light independent reactions?
No, the light-dependent reactions in photosynthesis cannot occur without the light-independent reactions. The light-dependent reactions, which take place in the thylakoid membranes of chloroplasts, require light energy to produce ATP and NADPH. These molecules are then used in the light-independent reactions (Calvin cycle) to convert carbon dioxide into glucose. Thus, both sets of reactions are interdependent and necessary for the complete process of photosynthesis.
Why is the second stage of photosynthesis called light independent reaction?
The light-independent reactions are sometimes referred to as the dark reactions, though that term may be misleading as they do not actually require darkness to proceed. The term "light-independent" is used to emphasize that the reactions occur regardless of the amount of light present as long as the proper substrate compounds are available. Even this term can be criticized, however, as the availability of substrates in plants depends on photosynthesis, so the reactions cannot be said to be entirely "light-independent." Furthermore, the term "dark reactions" may be more accurate in CAM (Crassulacean acid metabolism) plants, which only take up CO2, which is necessary for the reactions to proceed, at night.http://en.wikipedia.org/wiki/Light-independent_reaction
Beans in the dark will grow faster then the beans in the light why?
Beans grown in the dark tend to grow faster than those grown in the light because they allocate more energy towards elongating their stems to reach for light. In the absence of light, the energy is redirected into stem growth instead of leaf development, resulting in taller plants.
How the long do you leave the light on for marijuana?
12 hours of light 12 hours of dark
What happens when you manipulate plant growth by growing plants in the dark?
Plants do grow in the "dark." There are 2 phases to photosynthesis: a light phase and a dark phase. The dark phase does not necessarily mean it happens in the dark but it CAN occur during the dark. It is the metabolism of the compounds made during the light phase, the phase requiring sunlight, of photosynthesis. Plants held in the dark too long build up cell compounds from the normal cellular pathways and create a situation called "inhibition" in which the accumulation of the cellular metabolics, the by-product, build until it causes the cell to stop normal functioning and either dies or must alter the chemistry in a manner to move those by-products out of the cell.
What is the duration of The Long Absence?
The duration of The Long Absence is 1.42 hours.
When was The Long Absence created?
The Long Absence was created on 1961-05-17.
