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The light-dependent reaction can only occur in the light because light supplies the energy needed for the reaction. In this stage of photosynthesis, light energy is converted into chemical energy (ATP) and 'reducing power' (NADPH) which are then used in the light-independent reaction. Also in the light-dependent reaction, water is split to provide the hydrogen needed to make NADPH. The light-independent reaction can take place in the light andthe dark, i.e., it is independent of the light! However, it needs the products of the light-dependent reaction (ATP and NADPH), so it cannot continue indefinitely without it. In the light-independent reaction, the ATP and NADPH produced by the light-dependent reaction are used to convert carbon dioxide into carbohydrate, e.g., glucose. This happens in a series or reactions called the Calvin cycle. A link is provided.
What else can I help you with?
Why can the dark reaction occur in day light hours?
The dark reaction, also known as the Calvin cycle, can occur during daylight hours because it does not directly require light energy to proceed. It uses the ATP and NADPH generated during the light-dependent reactions to fix carbon dioxide and produce sugars. So even though it doesn't rely on light for its energy source, it still benefits from the products of the light-dependent reactions that happen during the day.
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.
Explain why the light-independent reactions are called such as?
The light-independent reactions do not directly require light energy to occur; they can proceed in the absence of light. These reactions, also known as the Calvin cycle, are responsible for the conversion of carbon dioxide into glucose and other organic molecules using ATP and NADPH produced during the light-dependent reactions.
Why is the light dependent reactions called the light dependent reaction?
it is the first stage because the product of the light dependent reaction is ATP and NADPH+H+ (Nicotinamide Adenine Dinucleotide Phosphate Hydrogen) and these are required in the light independent reaction (calvin-benson cycle) I hope this helps :DDD
Photosynthesis consists of two types of reactions?
There is a light reaction and a dark reaction (the Calvin Cycle). The light reaction is divided into 3 parts, Photosystem II, the Electron Transport Chain, and Photosystem I. The light reaction begins in Photosystem II when light hits the thylakoid so the chlorophyll loses and electron, and the electron moves up in energy levels and reaches the primary anceptor. From here it passes through the electron transport chain which is similar to the electron transport chain in cellular respiration, but it occurs in the thykaloids proton gradient is reversed through the membrane. Then it enters phtosystem I which is essentially the same thing as photosystem I, and the electrons from there pass through another electron transport chain. This produces ATP and NADPH which are used in the dark reaction, or Calvin Cycle, which is again similar to the Citric Acid Cycle but it begins with Acetyl acetate and produces 2 ATP 6 NADH and 1 FADH 2 per every 2 turns which are required to produce one glucose molecule, the ultimate goal of photosynthesis. I hope this was enough detail.
Which two reactants are needed for light dependent reaction?
My friends, the only 2 things you need are light and water. Sorry, though. If you dunk a lit light bulb in water, you will not get a light-dependent reaction. You will get electrocuted.... so don't try this one at home!
Why can the dark reaction occur in day light hours?
The dark reaction, also known as the Calvin cycle, can occur during daylight hours because it does not directly require light energy to proceed. It uses the ATP and NADPH generated during the light-dependent reactions to fix carbon dioxide and produce sugars. So even though it doesn't rely on light for its energy source, it still benefits from the products of the light-dependent reactions that happen during the day.
Light Reaction and Dark Reaction?
Light Reaction is other wise known as a light in-dependent reaction.It need Photons(little packages of Light energy) from the sun that goes to the stoma and coverts it over the the next step....(Down Below)Dark Reaction is other wise known as a light dependent reaction. Inside the stoma into the thylakloids(they are little pancake shaped things)and they use ATP (made in light reaction) and NADPH to convert CO2 (carbon dioxide) into Glucose.-MPD-
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
How do plant cells use photosynthesis to produce food?
Photosynthesis is a two part process. The first part is the light dependent reaction and it needs light. Light energy is used to make ATP (which takes place in the membrane of the thylakoid). The second part is the Calvin cycle/ light independent reaction and it doesnt need light. It uses the ATP that was made in the light dependent reaction to make glucose (which takes place in the stroma of the chloroplast). Glucose is the food.
Does mushroom need water and light?
Mushrooms do need water but are not dependent on light.
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.
Explain why the light-independent reactions are called such as?
The light-independent reactions do not directly require light energy to occur; they can proceed in the absence of light. These reactions, also known as the Calvin cycle, are responsible for the conversion of carbon dioxide into glucose and other organic molecules using ATP and NADPH produced during the light-dependent reactions.
Why is the light dependent reactions called the light dependent reaction?
it is the first stage because the product of the light dependent reaction is ATP and NADPH+H+ (Nicotinamide Adenine Dinucleotide Phosphate Hydrogen) and these are required in the light independent reaction (calvin-benson cycle) I hope this helps :DDD
Compare and contrast light dependent and light independent reactions of photosynthesis.?
Light-dependent reactions occur in the thylakoid membrane and require light energy to produce ATP and NADPH. Light-independent reactions (Calvin Cycle) occur in the stroma and use ATP and NADPH to convert CO2 into glucose. Both processes are essential for photosynthesis and occur in chloroplasts.
What type of chemical reaction is need to absorb energy to proceed?
Endothermic Reaction.... (Just to help you out someone helped me with this question and I GOT IT CORRECT!)
Do you need light for the light independent reaction to occur?
no you dont. you need complete darkness to allow the reaction to properly experimise
