What are light reactions associated with?

Photosynthesis begins with the light reactions. The energy is then temporarily transferred to two molecules, ATP and NADPH, which are used in the second stage of photosynthesis. ATP and NADPH are generated by two electron transport chains. During the light reactions, water is used and oxygen is produced.

Where does light reaction take place?

thylakoid discs
The light reaction takes place in the thylakoid discs. There, water (H20) is oxidized, and oxygen (O2) is released. The electrons freed up from water are transfered to ATP and NADPH. The dark reaction occurs outside of the thylakoids.

What is the light reaction process?

“Light reaction is the process of photosynthesis that converts energy from the sun into chemical energy in the form of NADPH and ATP.”

What is the significance of light reaction?

The main purpose of the light reaction is to generate organic energy molecules such as ATP and NADPH which are needed for the subsequent dark reaction. Chlorophyll absorbs the red and blue segment of the white light and photosynthesis occurs most efficiently at these wavelengths.

What are the end products of light reaction?

What are the end products of light reactions?

Hint: The process of using the energy in sunlight to make food (glucose) is known as photosynthesis.
Complete answer:
Therefore, the end products are ATP and NADPH.
Note: The ATP and NADPH from the light-dependent reactions are used to make sugars in the Calvin cycle.

What are the 4 steps of light reactions?

Here are the basic steps:

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.

Can the dark reaction occur in light?

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. Therefore, it is known as the dark reaction.

What are the three products of the light reactions?

Light reactions harness energy from the sun to produce chemical bonds, ATP, and NADPH.

What are the major events of light reaction?

The important events of light reaction are (i) Excitation of chlorophyll molecule to emit a pair of electrons and use of their energy in the formation of ATP from ADP + Pi. This process is called photophosphorylation. Splitting of water molecule (a) (b) End products of light reaction are NADPH and ATP.

What are the 3 products of light 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 3 products of the light-dependent reactions?

The exergonic light-dependent reactions of photosynthesis convert light energy into chemical energy, producing ATP and NADPH. These reactions occur in the thylakoids of the chloroplasts. The products of the light-dependent reactions, ATP and NADPH, are both required for the endergonic light-independent reactions.

What is another name for the light reaction?

The Calvin Cycle These reactions actually have several names associated with them. Other names for light-independent reactions include the Calvin cycle, the Calvin-Benson cycle, and dark reactions.

What are the steps of the light reaction?

To summarise the light reaction, we can write it down as the following reaction: 2H 2 O + 2NADP+ + 3ADP + 3Pi → O 2 + 2NADPH + 3ATP. For any plant performing photosynthesis, four factors influence this process. CO2, water, light, and chlorophyll are the raw materials for photosynthesis.

What is the purpose of the light reaction?

The Steps Involved in the Light Reaction. The main purpose of the light reaction is to generate organic energy molecules such as ATP and NADPH which are needed for the subsequent dark reaction. Chlorophyll absorbs the red and blue segment of the white light and photosynthesis occurs most efficiently at these wavelengths.

How is the light reaction involved in photosynthesis?

The light reaction is a light-dependent process which includes a series of events such as light absorption, hydrolysis, the release of oxygen, formation of ATP and NADPH. The light reaction of photosynthesis initiates only when it is supplied with light energy. The photosystem is the arrangement of pigments, including chlorophyll within thylakoids.

Which is an example of a light dependent reaction?

Light Dependent Reactions 1 Light Reaction Definition. “Light reaction is the process of photosynthesis that converts energy from the sun into chemical energy in the form of NADPH and ATP.” 2 Process of Light Reaction. 3 Key Points on Light Reaction.

What are light reactions associated with? Photosynthesis begins with the light reactions. The energy is then temporarily transferred to two molecules, ATP and NADPH, which are used in the second stage of photosynthesis. ATP and NADPH are generated by two electron transport chains. During the light reactions, water is used and oxygen is produced. Where…