What are the two stages of photosynthesis and the starting molecules?
Emily Ross
Published Jan 14, 2026
Figure: 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 2 beginning molecules for photosynthesis?
Photosynthesis requires sunlight, carbon dioxide, and water as starting reactants (Figure 5.5). After the process is complete, photosynthesis releases oxygen and produces carbohydrate molecules, most commonly glucose. These sugar molecules contain the energy that living things need to survive.
What are 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 is Stage 2 of photosynthesis called?
Carbon atoms end up in you, and in other life forms, thanks to the second stage of photosynthesis, known as the Calvin cycle (or the light-independent reactions).
What are the 2 stages of photosynthesis and where do they occur?
Photosynthesis takes place in two stages: light-dependent reactions and the Calvin cycle. Light-dependent reactions, which take place in the thylakoid membrane, use light energy to make ATP and NADPH. The Calvin cycle, which takes place in the stroma, uses energy derived from these compounds to make GA3P from CO2.
27 related questions foundWhat is the 1st stage of photosynthesis?
In the first stage, light-dependent reactions or light reactions capture the energy of light and use it to make the hydrogen carrier NADPH and the energy-storage molecule ATP. During the second stage, the light-independent reactions use these products to capture and reduce carbon dioxide.
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 stages of photosynthesis in order?
The overall process of photosynthesis can be objectively divided into four steps/ process:
- Absorption of light. The first step in photosynthesis is the absorption of light by chlorophylls that are attached to the proteins in the thylakoids of chloroplasts. ...
- Electron Transfer. ...
- Generation of ATP. ...
- Carbon Fixation.
Which of these molecules complete the process of photosynthesis?
During the process of photosynthesis, cells use carbon dioxide and energy from the Sun to make sugar molecules and oxygen. These sugar molecules are the basis for more complex molecules made by the photosynthetic cell, such as glucose.
What are the two things made by plants bacteria and protists by photosynthesis?
The two products of photosynthesis are sugar and oxygen.
What components are needed to begin the process of photosynthesis?
To perform photosynthesis, plants need three things: carbon dioxide, water, and sunlight. for photosynthesis. Carbon dioxide enters through tiny holes in a plant's leaves, flowers, branches, stems, and roots. Plants also require water to make their food.
Which is the final step in photosynthesis process?
The last stage of the photosynthesis process is known as the Calvin-Benson cycle, in which the plant uses atmospheric carbon dioxide and water from soil to convert ATP and NADPH. The chemical reactions that make up the Calvin-Benson cycle occur in the stroma of the chloroplast.
What are the stages of photosynthesis quizlet?
Terms in this set (3)
- stage one. sunlight absorbed by pigments. light dependent. water is split. ...
- stage two. light dependent. ATP created... used to fuel third stage. ...
- stage three. dark reaction (light independent) also known as the "calvin cycle" glucose created (a product of photosynthesis)
What is the first step of photosynthesis quizlet?
The first stage of photosynthesis is called the light reactions. During this stage, light is absorbed and transformed to chemical energy in the bonds of NADPH and ATP.
What are the 2 products of the light reactions that are needed for the Calvin cycle?
ATP and NADPH are the two products of the light reactions that are used up in the Calvin cycle.
What is photosynthesis process?
photosynthesis, the process by which green plants and certain other organisms transform light energy into chemical energy. During photosynthesis in green plants, light energy is captured and used to convert water, carbon dioxide, and minerals into oxygen and energy-rich organic compounds.
How are the molecules in photosynthesis and cellular respiration similar?
Photosynthesis and cellular respiration are two biochemical processes that are essential to most life on Earth. Both of these processes involve multiple complex steps and many of the same molecules—oxygen (O2), carbon dioxide (CO2), water (H2O), glucose (C6H12O6), and adenosine triphosphate (ATP).
What are the 2 products of cellular respiration?
In cellular respiration, glucose and oxygen react to form ATP. Water and carbon dioxide are released as byproducts.
What 2 products made during cellular respiration gets used in photosynthesis?
Cellular respiration makes carbon dioxide and water (and ATP), which are the starting products (together with sunlight) for photosynthesis.
How do plants acquire the starting reactants of photosynthesis?
Photosynthesis Reactants
The plant acquires water through its root system. The next required reactant is carbon dioxide. The plant absorbs this gas through its leaves. The final required reactant is light energy.
What are the 2 products that come out of the chloroplast during photosynthesis?
The products of photosynthesis are glucose and oxygen.
Which molecules are reactants in photosynthesis in plants?
Water and carbon dioxide are reactants for photosynthesis.
Which molecules are reactants in photosynthesis in plants quizlet?
The reactants (also called raw materials) of photosynthesis are: carbon dioxide (CO2), water (H2O) and light energy (sunlight).
What came first photosynthesis or cellular respiration?
Photosynthesis evolved about 3 billion years ago and released oxygen into the atmosphere. Cellular respiration evolved after that to make use of the oxygen.