Table of Contents
- 1 How is dark phase of photosynthesis dependent on the light phase?
- 2 How does dark reaction depend on light reaction?
- 3 Do the light independent reactions of photosynthesis occur in the dark?
- 4 What is dark stage of photosynthesis?
- 5 How does light reaction differ to dark reaction?
- 6 Which light reaction occurs in the dark?
- 7 Does the dark reaction occur at night?
- 8 What is light phase and dark phase?
How is dark phase of photosynthesis dependent on the light phase?
The light absorption occurs with the help of photosystem I and photosystem II. At the end of light reaction ATP and NADPH are produced which are used in dark reactions to produce glucose from carbon dioxide. Dark phase: It takes place in the stroma or matrix of chloroplast and can take place in the absence of light.
How does dark reaction depend on light reaction?
The Calvin cycle is also called the dark reactions or light-independent reactions because it is the part that doesn’t need energy from the sun to happen. So although the cycle itself doesn’t use light energy, it does depend on the light reactions to provide it with the ATP and NADPH.
Will the light dependent reaction work in the dark?
No. As the title says, light-dependent reactions are dependent on light to occur. The purpose of these structures is to absorb light in turn exciting the electrons that make them up. At a point, the electrons gain so much kinetic energy that they will leave the Photosystem and pass through the electron transport chain.
Do the light independent reactions of photosynthesis occur in the dark?
The light independent process (also called dark reactions or the Calvin-Benson cycle) takes place in the stroma of the chloroplast. Carbon dioxide is modified by series of chemical reactions to form carbohydrates. The energy for these reactions comes from ATP and NADPH generated during the light dependent process.
What is dark stage of photosynthesis?
The dark stage of photosynthesis is an intricate process where NADPH and ATP are used to produce carbohydrate molecules (or sugars). Unlike the light phase, it can happen in light or darkness.
What is light reaction and dark reaction in photosynthesis?
The main difference between light and dark reaction is that light reaction is the first stage of photosynthesis, which traps light energy in order to produce ATP and NADPH whereas dark reaction is the second stage of photosynthesis, which produces glucose by using the energy form ATP and NADPH produced from the light …
How does light reaction differ to dark reaction?
Which light reaction occurs in the dark?
Difference between Light and Dark Reaction
| Light Reaction | Dark Reaction |
|---|---|
| The water molecules split into hydrogen and oxygen. | Glucose is produced. Co2 is utilized in the dark reaction. |
| Photolysis occurs in PS-II. | Photolysis does not occur. |
Why is light needed for light-dependent reactions?
Light is required for the light dependent reactions because it energizes electrons in the reaction centre. Photosynthesis involves light reaction and dark reaction. During light reaction, the chlorophyll present in the (1) _______________ gets activated by absorbing light energy.
Does the dark reaction occur at night?
No, the dark reaction does not occur at night. It occurs during the day, but the reaction does not use the light directly.
What is light phase and dark phase?
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.