- 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 4 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 CO 2 into carbohydrates (carbon fixation) .
What are the steps of light reaction in order?
Figure 1. 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 4 inputs of the light Reaction?
For each of the two main stages of photosynthesis, identify the inputs. Inputs of the light reactions are light and water, and ADP, P, and NADP + from the Calvin cycle . Inputs of the Calvin cycle are CO 2 , and ATP and NADPH from the light reactions.
What is Step 1 of the light reactions?
Stage I is called the light reactions. This stage uses water and changes light energy from the sun into chemical energy stored in ATP and NADPH (another energy-carrying molecule). This stage also releases oxygen as a waste product. Stage II is called the Calvin cycle.
What are the steps of the light reactions of photosynthesis?
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 are the three main steps of the light reactions quizlet?
- Step 1-Light Dependent. CO2 and H2O enter the leaf.
- Step 2- Light Dependent. Light hits the pigment in the membrane of a thylakoid, splitting the H2O into O2.
- Step 3- Light Dependent. The electrons move down to enzymes.
- Step 4-Light Dependent. ...
- Step 5-Light independent. ...
- Step 6-Light independent. ...
- calvin cycle.
What are the 3 main steps of photosynthesis?
The three events that occur during the process of photosynthesis are: (i) Absorption of light energy by chlorophyll. (ii) Conversion of light energy to chemical energy and splitting of water molecules into hydrogen and oxygen. (iii) Reduction of carbon dioxide to carbohydrates .
What are the steps in 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 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 are light reactions?
The series of biochemical reactions in photosynthesis that require light energy that is captured by light-absorbing pigments (such as chlorophyll) to be converted into chemical energy in the form of ATP and NADPH. Synonym: light-dependent reaction.
What is the process of light-dependent reaction?
In the light-dependent reactions, which take place at the thylakoid membrane, chlorophyll absorbs energy from sunlight and then converts it into chemical energy with the use of water . The light-dependent reactions release oxygen as a byproduct as water is broken apart.
What are inputs and outputs of the reaction?
In other words, if something is required for a reaction to occur, and it does not remain in its original form when the reaction is complete, it is an input.) ... In the Calvin cycle, the energy outputs from the light reactions (ATP and NADPH) are used to power the conversion of CO2 into the sugar G3P.
What are the 6 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 steps of photosystem 2?
Photosystem II obtains replacement electrons from water molecules, resulting in their split into hydrogen ions (H+) and oxygen atoms. The oxygen atoms combine to form molecular oxygen (O 2 ), which is released into the atmosphere. The hydrogen ions are released into the lumen.
What does the stroma do?
Stroma: The fluid of the chloroplast surrounding the thylakoid membrane; involved in the synthesis of organic molecules from carbon dioxide and water . Thylakoid: A flattened membrane sac inside the chloroplast, used to convert light energy to chemical energy.
