Is co2 needed for light-dependent reactions?

In the light-independent reactions, the chemical energy harvested during the light-dependent reactions drives the assembly of sugar molecules from carbon dioxide. Therefore, although the light-independent reactions do not use light as a reactant, they require the products of the light-dependent reactions to function.

What gas is produced during the light-dependent reactions?

oxygen
The light-dependent reactions release oxygen as a byproduct as water is broken apart. In the Calvin cycle, which takes place in the stroma, the chemical energy derived from the light-dependent reactions drives both the capture of carbon in carbon dioxide molecules and the subsequent assembly of sugar molecules.

What are the needed materials in light-dependent reactions?

The light dependent reaction uses water and light. Light provides the energy needed to break apart water molecule. This process will make oxygen and hydrogen ions. The hydrogen ions are used to make ATP.

What are the 5 steps of light-dependent 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.

What is the waste product in the light-dependent cycle?

During the light dependent reactions of photosynthesis, water is split into O2 and H+ . The oxygen is excreted and the hydrogen ion combines with NADP to form NADPH, which will be used in the Calvin cycle (light independent reactions).

What are the end products of light dependent reaction?

ATP and NADPH2 are the product of light-dependent reactions which reduces CO2 into carbohydrate in the light-independent reactions and oxygen is evolved.

What are the 7 steps to light-dependent reactions?

Terms in this set (7)

• (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 are the three major steps in light-dependent reaction?

These reactions occur within specialised membrane discs within the chloroplast called thylakoids and involve three steps: Excitation of photosystems by light energy. Production of ATP via an electron transport chain.

What are light-dependent reactions?

The light-dependent reaction is a photochemical reaction taking place in the thylakoid membranes of chloroplasts, where light energy is transformed into adenosine triphosphate (ATP) and nicotinamide adenine dinucleotide phosphate (NADPH).

What is the first step in the light-dependent reactions?

The overall function of light-dependent reactions, the first stage of photosynthesis, is to convert solar energy into chemical energy in the form of NADPH and ATP, which are used in light-independent reactions and fuel the assembly of sugar molecules.

What are raw materials used in light dependent reactions?

What raw materials are used in light dependent reactions? Water and light. The light dependent reaction uses water and light. Light provides the energy needed to break apart water molecule. This process will make oxygen and hydrogen ions. The hydrogen ions are used to make ATP.

How are light dependent reactions used in photosynthesis?

Before we get into the details of the light-dependent reactions, let’s step back and get an overview of this remarkable energy-transforming process. 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.

Where do electrons go in the light dependent reaction?

The electrons flow from PSII to PSI and lose energy to translocate the H + ions from the stroma into the thylakoid lumen. Hydrogen ions flow through ATP synthase via chemiosmosis to form molecules of ATP. Photosystem I releases electrons, which results in the formation of an NADPH molecule.

Where does the energy produced in the light reaction go?

The energy-carrier molecules, ATP, and NADPH produced in the light reaction are used in the second phase of photosynthesis or the Calvin cycle to assemble sugar molecules. Plants absorb energy from the sun during photosynthesis. A photon of light strikes the antenna of photosystem II (PSII) and reaches the reaction center.