The light-independent reactions are sometimes called the Calvin cycle because of the cyclical nature of the process. Although the light-independent reactions do not use light as a reactant (and as a result can take place at day or night), they require the products of the light-dependent reactions to function.
Does light independent require light?
Light-independent reaction is a series of biochemical reactions in photosynthesis not requiring light to proceed, and ultimately produce organic molecules from carbon dioxide. The energy released from ATP (produced during the light reactions) drives this metabolic pathway.
The requirements or ingredients for light-independent reactions are carbon dioxide and energy in the form of ATP and NADPH.
Can light-independent reactions occur in darkness?
(iv) Light reactions take place in the presence of light and dark reactions are independent of the products formed during light reactions.
At a point, the electrons gain so much kinetic energy that they will leave the Photosystem and pass through the electron transport chain. If they cannot gain enough energy from sunlight, the electron transport chain will not occur. Thus, light is necessary for the light-dependent reaction.
Why is light needed for light-dependent reactions?
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.
Which is light independent reaction?
The light-independent reactions of photosynthesis take place within the stroma. It contains enzymes that work with ATP and NADPH to “fix” carbon from carbon dioxide into molecules that can be used to build glucose.
What are the three requirements of light dependent reaction?
What is required for both the light dependent and light-independent reactions to proceed?
Light dependent reactions occur in Grana of Chloroplasts, Light Independent reactions occur in Stroma of Chloroplasts. Hence Chloroplasts are required for both the light-dependent and light-independent reactions to proceed. Elaine C. The answer is energy.
Where does light dependent reaction occur?
Light-dependent reactions happen in the thylakoid membrane of the chloroplasts and occur in the presence of sunlight. The sunlight is converted to chemical energy during these reactions. The chlorophyll in the plants absorb sunlight and transfers to the photosystem which are responsible for photosynthesis.
Can Calvin cycle occur without light-dependent reaction?
1 Answer. Krishan T. Calvin-Benson cycle would not be possible without the light dependent reactions because it would lack ATP and NADPH2 molecules.
What is the difference between light-dependent and 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 is required for both the light-dependent and light-independent reactions to proceed quizlet?
The L-D reactions require light energy and water, and the L-IND reactions require ATP, NADPH and CO2.
Why is there a need to go on with light-independent reactions Why not stop with the light-dependent reactions since ATP and NADPH are energy carrying molecules?
Why is there a need to go on with Light-Independent reactions? Why not stop with Light-Dependent Reactions since ATP and NADPH are energy carrying molecules? The Light-Independent uses ATP and NADPH from the Light-Dependent reactions to produce high energy carbohydrates and oxygen. Where does Carbon Dioxide come from?
Why are light-independent reactions called?
These reactions are also called the light-independent reactions because they are not directly driven by light. In the Calvin cycle, carbon atoms from CO2start text, C, O, end text, start subscript, 2, end subscript are fixed (incorporated into organic molecules) and used to build three-carbon sugars.
Does light independent reaction produce ATP?
The light-independent reactions use the ATP and NADPH from the light-dependent reactions to reduce carbon dioxide and convert the energy to the chemical bond energy in carbohydrates such as glucose.
Which of the following reactions of photosynthesis are not light independent?
These energy-carrying molecules are made in the stroma where the Calvin cycle takes place. The Calvin cycle is not totally independent of light since it relies on ATP and NADH, which are products of the light-dependent reactions.
What are the four reactants needed for light reaction to occur?
In photosynthesis, water, carbon dioxide, ATP, and NADPH are reactants. RuBP and oxygen are products. In photosynthesis, water and carbon dioxide are reactants. GA3P and oxygen are products.
How are light dependent and light-independent reactions of photosynthesis related?
What is the process of light dependent reaction?
In the light-dependent reactions, which take place at the thylakoid membrane, chlorophyll absorbs energy from sunlight and then converts it into chemical energy with the use of water. The light-dependent reactions release oxygen as a byproduct as water is broken apart.
Does the Calvin cycle require light?
The Calvin cycle refers to the light-independent reactions in photosynthesis that take place in three key steps. Although the Calvin Cycle is not directly dependent on light, it is indirectly dependent on light since the necessary energy carriers (ATP and NADPH) are products of light-dependent reactions.
Why does Calvin cycle also called light-independent reaction?
The Calvin cycle is also known as the light- independent reactions because it is not directly driven by light. It is considered indirectly dependent on light since the necessary energy carriers ( ATP and NADPH) which are products of light-dependent reactions.
Why does Calvin cycle needs the product of light face?
Because it is needed to convert oxygen into sugar. Explanation: Although the Calvin Cycle is not light-dependent directly, it is light-Dependent indirectly because the required energy carriers are results of light-dependent processes.
What are the light independent products?
The light-independent reaction’s reactants are carbon dioxide, NADPH and ATP. Its products are glucose, NADP+, ADP, and inorganic phosphate.
Which is an important difference between light-dependent LD and light-independent?
Terms in this set (10) Which is an important difference between light-dependent (L-D) and light-independent (L-IND) reactions in photosynthesis? The L-D reactions require light energy and water, and the L-IND reactions require ATP, NADPH, and CO2.
Where does the light-independent reactions get their energy from quizlet?
The light-dependent reactions require light and water, occur in the thylakoids, and produce ATP and NADPH. The light-independent reactions require carbon dioxide, occur in the stroma, and produce high-energy sugars.
Why should the light dependent reaction occur before the light-independent reaction?
Light-dependent reactions occur before light-independent reactions because of the following reactions: Light-dependent reactions take place in thylakoid membranes (grana) of chloroplasts in presence of light. , which then passes into the stroma of the chloroplast.
Which of the following reactions are light dependent?
So, the correct answer is ATP and NADPH2.
What is the byproduct of light independent reaction?
The light-independent reactions can proceed once products (NADPH and ATP) of the light-dependent reactions are present in the chloroplast.
What are the reactants and products of light-dependent and light-independent reactions?
The products of light-dependent pathways of photosynthesis are Oxygen, ATP, and NADPH. The reactants of light-independent reactions are ATP, NADPH, and Carbon Dioxide. The main purpose of the light independent reaction is to produce glucose.
What are the products of light independent reaction used to power the light independent reaction?
NADPH and ATP are the products of light-dependent reactions used to power the light-independent reaction.
Which step in photosynthesis does not need light?
The light-independent stage, also known as the Calvin Cycle, takes place in the stroma, the space between the thylakoid membranes and the chloroplast membranes, and does not require light, hence the name light-independent reaction.
In what ways are the light-dependent and light-independent reactions related or reliant on one another?
1 Answer. The light-independent reactions (calvin cycle) use the energy-carrying molecules (ATP and NADPH) from the light-dependent reactions along with absorbed carbon dioxide to form glucose.
Why the light reactions and dark reactions are interdependent?
The products of light reaction, i.e. ATP & NADPH2 (assimilatory power) are required for dark reaction i.e. for reduction of CO2 into glucose. During dark phase, ADP, iP, & NADP get regenerated, and are required for the synthesis of ATP & NADPH2 during light reaction. Thus the two are interdependent.
How does a plant make energy without light?
At night, or in the absence of light, photosynthesis in plants stops, and respiration is the dominant process. The plant uses energy from the glucose it produced for growth and other metabolic processes.
What provides electrons for the light reactions?
Light reactions occur when plants synthesize food from carbon dioxide and water, referring specifically to the part of energy production that requires light and water to generate electrons needed for further synthesis. Water provides the electrons by splitting into hydrogen and oxygen atoms.
How does the Calvin cycle differ from the light-dependent reactions?
Light-dependent reactions, which take place in the thylakoid membrane, use light energy to make ATP and NADPH. The Calvin cycle, which takes place in the stroma, uses energy derived from these compounds to make GA3P from CO2.