what are the steps of light dependent reactions

The two stages of photosynthesis: Photosynthesis takes place in two stages: light-dependent reactions and the Calvin cycle (light-independent reactions). Light-dependent reactions, which take place in the thylakoid membrane, use light energy to make ATP and NADPH.

What does light do in the 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.

How do you differentiate light dependent reaction from 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 are the 4 steps of the Calvin cycle?

The Calvin cycle has four main steps: carbon fixation, reduction phase, carbohydrate formation, and regeneration phase. Energy to fuel chemical reactions in this sugar-generating process is provided by ATP and NADPH, chemical compounds which contain the energy plants have captured from sunlight.

What is the first step in photosynthesis light dependent process?

How Light-Dependent Reactions Work. 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 the 10 steps of photosynthesis?

Terms in this set (10)

  • Step One (Light Reaction) Three ingredients are needed: water, sunlight, and carbon dioxide. …
  • Step Two (Light Reaction) …
  • Step Three (Light Reaction) …
  • Step Four (Light Reaction) …
  • Step Five (Light Reaction) …
  • Step Six (Light Reaction) …
  • Step Seven (Light Reaction) …
  • Step Eight (Dark Reaction)

What are the 3 steps of photosynthesis?

1 Answer

  • Absorption of light energy by chlorophyll.
  • Conversion of light energy to chemical energy and splitting of water molecule into hydrogen and oxygen.
  • Reduction of carbon dioxide to carbohydrates. Please log in or register to add a comment. ← Prev Question Next Question →

What are the steps for photosynthesis?

The stages of photosynthesis

Stage Location Events
Light-dependent reactions Thylakoid membrane Light energy is captured by chloroplasts and stored as ATP
Calvin cycle Stroma ATP is used to create sugars that the plant will use to grow and live

What are the 4 steps of light reactions?

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.

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.

How do the events in the Calvin cycle depend on the light-dependent reactions of photosynthesis?

How do the events in the Calvin cycle depend on the light-dependent reactions? The Calvin cycle uses the ATP and NADPH produced during the light-dependent reactions to produce high-energy sugars.

Do light reactions depend on the Calvin cycle?

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.

How do the processes of light dependent and light independent reactions help the cell conserve energy and matter?

These molecules are then used to produce the carbohydrate molecules when light is not available. This alternation helps in the conservation of the energy as the plant can consume sufficient light energy and then produce the carbohydrate molecule when this energy cannot be harvested from the environment.

How do light reactions help the Calvin cycle?

The light reactions capture energy from sunlight, which they change to chemical energy that is stored in molecules of NADPH and ATP. … The reactions of the Calvin cycle add carbon (from carbon dioxide in the atmosphere) to a simple five-carbon molecule called RuBP.

What are the 2 stages of photosynthesis?

While there are many steps behind the process of photosynthesis, it can be broken down into two major stages: light-dependent reactions and light-independent reactions.

What are the two stages of photosynthesis quizlet?

What are the two stages of photosynthesis? 1=light reactions/light dependent reactions. 2=the calvin cycle/light independent reactions.

What are the 5 steps of the Calvin cycle?

Reactions of the Calvin cycle

  • Carbon fixation. A CO2​start text, C, O, end text, start subscript, 2, end subscript molecule combines with a five-carbon acceptor molecule, ribulose-1,5-bisphosphate (RuBP). …
  • Reduction. …
  • Regeneration.

What are the 3 steps of the Calvin cycle?

The Calvin cycle reactions (Figure 2) can be organized into three basic stages: fixation, reduction, and regeneration. In the stroma, in addition to CO2, two other chemicals are present to initiate the Calvin cycle: an enzyme abbreviated RuBisCO, and the molecule ribulose bisphosphate (RuBP).

What are the four main steps of photosynthesis?

It is convenient to divide the photosynthetic process in plants into four stages, each occurring in a defined area of the chloroplast: (1) absorption of light, (2) electron transport leading to the reduction of NADP+ to NADPH, (3) generation of ATP, and (4) conversion of CO2 into carbohydrates (carbon fixation).

What is first step in photosynthesis?

The first step in photosynthesis is the light reaction or photochemical reactions resulting in the formation of ATP and NADPH, which are later utilised in the biosynthesis process. In the first stage, light energy is captured and converted to chemical energy. Oxygen is produced by splitting of water.

What are the light reactions in photosynthesis?

During the light-dependent stage (“light” reactions), chlorophyll absorbs light energy, which excites some electrons in the pigment molecules to higher energy levels; these leave the chlorophyll and pass along a series of molecules, generating formation of NADPH (an enzyme) and high-energy ATP molecules.

What are the three main steps of the light reactions?

The light-independent reactions of the Calvin cycle can be organized into three basic stages: fixation, reduction, and regeneration.

What are the steps in photosynthesis Brainly?


  • Answer:
  • Step 1 :- Absorption of light energy by chlorophyll.
  • Step 2 :- Conversion of light energy to chemical energy and splitting of water molecule into hydrogen and oxygen.
  • Step 3 :- Reduction of carbon dioxide by hydrogen to form carbohydrate like glucose.

What are the steps in photosynthesis write the chemical equation of photosynthesis?

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