What is the importance of the light-independent reactions?
What is the biological significance of the light-independent reactions of photosynthesis? They convert carbon dioxide to sugar. They generate ATP and NADPH. They convert ATP to sugar.
Why do plant cells have light-dependent and light-independent 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.
Why do light-independent reactions occur in the stroma?
Once in the mesophyll cells, CO2 diffuses into the stroma of the chloroplast—the site of light-independent reactions of photosynthesis. 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.
Where does the light-independent occur?
plant chloroplasts
What is the difference between light-dependent and 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 end products of light-independent reaction?
There are two end products of the light reaction of photosynthesis, ATP and NADPH. These molecules are produced during the cyclic and the non-cyclic photophosphorylation reactions.
What is another name for light-independent reactions?
the Calvin cycle
Does light-independent reaction produce oxygen?
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.
Is oxygen a product of light reaction?
Essentially, oxygen is a waste product of the light reactions of photosynthesis. It is a ”leftover” from a necessary part of the process. All the oxygen that is necessary to maintain most forms of life just happens to come about during this process.
How is light energy used in photosynthesis?
Light provides energy for the synthesis of glucose from carbon dioxide and water during photosynthesis. During light reaction, the chlorophyll entraps light and the solar energy is converted into chemical energy in the form of ATP molecules. This can happen because light energy is used to split water.
Do plants fix carbon?
In photosynthesis, energy from sunlight drives the carbon fixation pathway. Oxygenic photosynthesis is used by the primary producers—plants, algae, and cyanobacteria. They contain the pigment chlorophyll, and use the Calvin cycle to fix carbon autotrophically.
What is the chemical reaction of photosynthesis?
The process of photosynthesis is commonly written as: 6CO2 + 6H2O → C6H12O6 + 6O2. This means that the reactants, six carbon dioxide molecules and six water molecules, are converted by light energy captured by chlorophyll (implied by the arrow) into a sugar molecule and six oxygen molecules, the products.
What happens to sunlight in photosynthesis?
During photosynthesis, plants trap light energy with their leaves. Plants use the energy of the sun to change water and carbon dioxide into a sugar called glucose. Glucose is used by plants for energy and to make other substances like cellulose and starch. Cellulose is used in building cell walls.
What are the two main reactions of photosynthesis?
The stages of photosynthesis There are two main stages of photosynthesis: the light-dependent reactions and the Calvin cycle. Requires sunlight? Schematic of the light-dependent reactions and Calvin cycle and how they’re connected.
Why do plants need both photosynthesis and cellular respiration?
The main purpose of photosynthesis is to convert radiant energy from the sun into chemical energy that can be used for food. Cellular respiration is the process that occurs in the mitochondria of organisms (animals and plants) to break down sugar in the presence of oxygen to release energy in the form of ATP.
What has the smallest effect on photosynthesis?
which of the following has the smallest affect on the rate of photosynthesis? oxygen concentration. You just studied 20 terms!
Do plants do respiration?
Plant cells respire, just as animal cells do. If they stop respiring, they will die. Remember that respiration is not the same as breathing, so take care – plants do not breathe.
Can photosynthesis occur without cellular respiration?
Cellular respiration cannot occur without photosynthesis, and photosynthesis certainly cannot occur without the help of its partner.
How do photosynthesis and cellular respiration affect you?
While cellular respiration releases carbon dioxide into the environment, photosynthesis pulls carbon dioxide out of the atmosphere. The exchange of carbon dioxide and oxygen during photosynthesis (Figure below) and cellular respiration worldwide helps to keep atmospheric oxygen and carbon dioxide at stable levels.
Do plants use fermentation?
Fermentation is an anaerobic process in which energy is produced from glucose in absence of oxygen. It takes place in yeast, bacteria, plants and in the muscle cells of animals. It produces very less amount of ATP.