The products of the light-dependent reactions, ATP and NADPH , are both required for the endergonic light-independent reactions. The light-dependent reactions involve two photosystems called Photosystem I and Photosystem II.
What are the 3 end products of the light-independent reaction?
Light reactions harness energy from the sun to produce chemical bonds, ATP, and NADPH. These energy-carrying molecules are made in the stroma where carbon fixation takes place. The light-independent reactions of the Calvin cycle can be organized into three basic stages: fixation, reduction, and regeneration .
What are the products of light-dependent reactions?
2. The light-dependent reactions convert light energy into chemical energy. The goal of the light-dependent reactions of photosynthesis is to collect energy from the sun and break down water molecules to produce ATP and NADPH . These two energy-storing molecules are then used in the light-independent reactions.
Is light a reaction?
Light reaction is the first stage of photosynthesis process in which solar energy is converted into chemical energy in the form of ATP and NADPH. The protein complexes and the pigment molecules help in the production of NADPH and ATP.
What are the end products of light-dependent reaction Class 10?
ATP and NADPH2 are the product of light-dependent reactions which reduces CO 2 into carbohydrate in the light-independent reactions and oxygen is evolved.
What is difference between light and dark reaction?
What is the difference between light and dark reaction? The light reaction is the initial stage of photosynthesis which traps light energy to produce ATP and NADPH, whereas dark reaction is the second step of photosynthesis which utilizes the energy from ATP and NADPH to produce glucose.
Does light independent reaction produce oxygen?
Photosynthesis absorbs light energy to build carbohydrates in chloroplasts, and aerobic cellular respiration releases energy by using oxygen to metabolize carbohydrates in the cytoplasm and mitochondria. Photosynthesis consumes carbon dioxide and produces oxygen.
Is glucose a light dependent reaction?
Oxygenic photosynthesis is composed of two stages: the light-dependent reactions and the light-independent reactions. 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.
Why does oxygen production stop without light?
Answer 2: Plants break down sugar to energy using the same processes that we do. Oxygen is needed to break the sugar into carbon dioxide, releasing energy the plants can use to stay alive. ... Since there's no sunlight at night, this gives the plants a way to stay alive, even when there's no light.
What are the 7 steps of light-dependent reactions?
- (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 is the difference between light-dependent and light-independent reaction?
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 the product of light reaction?
Thus the correct answer is (A) NADPH and ATP are the products of light reaction.
Where do light reactions occur?
The light reaction takes place in the thylakoid discs . There, water (H 2 0) is oxidized, and oxygen (O 2 ) is released. The electrons freed up from water are transfered to ATP and NADPH. The dark reaction occurs outside of the thylakoids.
What are the 4 steps of light reactions?
- Light absorption in PSII. When light is absorbed by one of the many pigments in photosystem II, energy is passed inward from pigment to pigment until it reaches the reaction center. ...
- ATP synthesis. ...
- Light absorption in PSI. ...
- NADPH formation.
What are the two types of light reaction?
Two types of reaction centers exist, generally called Photosystem I (PSI) and Photosystem II (PSII). Thus, two types of overall reactions make up photosynthesis— the light and dark reactions —while two more types of reactions compose the light reaction—those carried out by PSI and PSII.
What is the relationship between light reaction and dark reaction?
| Light reaction Dark reaction | It takes place in the presence of light. It takes place in the presence or absence of light. | It is also called a photochemical reaction or Hill reaction. It is also called the biosynthetic phase or Blackman's reaction or carbon dioxide fixation or the Calvin cycle. |
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