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Photosynthesis
This category is for questions about the chemical process in which autotrophic organisms use sunlight, carbon dioxide and water to make glucose, water and oxygen. This process is vital to life and is of great importance in biology.
6,415 Questions
Where in a cell does photosynthesis occur?
Photosynthesis occurs only in plant cells.
This is because only plant cells (unlike animal cells) contain chloroplasts. These chloroplasts are the site of photosynthesis in the plant cell, and contain the necessary pigment of chlorophyll which is required for photosynthesis to take place.
The photosynthesis equation is as follows:
CO2 + H2O (in the presence of light and Chlorophyll) = energy + O2
What are the organelles in the plant cells that turn energy from sunlight into food?
Chloroplasts are the organelles in plant cells that turn energy from sunlight into food through the process of photosynthesis. They contain chlorophyll, a pigment that absorbs light energy and converts it into chemical energy in the form of glucose.
What are the raw materials for photosynthesis?
The 3 materials needed for photosynthesis are water, carbon dioxide, and sunlight. These 3 materials combined enable the plant to make a sugary substance known as glucose. 6 molecules of water+6 molecules of carbon dioxide=1 molecule of sugar+6 molecules of oxygen* *=The plant doesn't need the oxygen so it releases it into the air. That's how we get our oxygen. :)
Where does the carbon dioxide come from in cellular respiration?
The carbon dioxide in cellular respiration comes from the breakdown of glucose molecules during the process. When glucose is broken down in the presence of oxygen, carbon dioxide is produced as a byproduct.
How are photosynthesis and cell respiration related?
Photosynthesis and cellular respiration are interdependent processes in living organisms. During photosynthesis, plants use sunlight to convert carbon dioxide and water into glucose and oxygen. Cellular respiration then uses this glucose and oxygen to produce energy for the cell, releasing carbon dioxide and water as byproducts. Overall, these two processes work together to maintain the balance of oxygen and carbon dioxide in the atmosphere and provide energy for organisms.
What product of photosynthesis do most living things need to survive?
Most living things need oxygen, which is produced as a byproduct of photosynthesis, to survive. Oxygen is a critical component of cellular respiration, the process by which cells convert oxygen and glucose into energy.
What is the importance of light in photosynthesis?
The equation of photosynthesis is as below:
Carbon dioxide + Water ---------> Glucose + Oxygen
This reaction takes place in the presence of light and chlorophyll.
The process of photosynthesis is completed in two stages:-
Light Reactions: When light falls on leaves, it is absorbed by the chlorophyll in the chloroplasts. The solar energy is utilized to split water into oxygen and hydrogen, this process is called photolysis, and oxygen is released during this process. As these reactions take place only in the presence light, they are called light reactions.
During light reactions two compounds are formed when solar energy is converted into chemical energy, these are:
- NADPH (Nicotinamide Adenine Di-nucleotide Phosphate)
- ATP (Adenosine Tri-Phosphate)
NADP already exists in the cells of the leaf. The hydrogen released on the photolysis of water molecule is accepted by this compound and it becomes reduced to form NADPH.
NADP (in cell) + H (from water) ---------> NADPH
This reaction takes place in the presence of light and enzymes.
The compound ADP (Adenosine Di-Phosphate) is already present in the cells of the leaf and combines with the phosphate group using light energy to form a compound called ATP.
ADP + P ---------> ATP
This reaction also takes place in the presence of light and enzymes.
These compounds are energy rich and are needed for the dark reactions in photosynthesis.
Dark Reactions: Utilizing the energy from ATP and the hydrogen from NADPH, water combines with carbon dioxide to form carbohydrates. Thus, the solar energy is now converted into chemical energy to form glucose. Other organic compounds are further synthesized from this glucose.
This stage is also completed in a series of chemical reactions with the help of enzymes . Scientists have discovered an interesting thing about these two stages: only the first requires light, and the second can occur in the dark. So we call these reactions light and dark reactions respectively. Neither light energy nor chlorophyll are required for the dark reactions.
Various steps of the dark reactions were studied by a scientist named Melvin Calvin, thus dark reactions are also known as Calvin's Cycle. When scientists performed experiments with chlorella plant, they found the rate of photosynthesis increased in non-continuous supply of light and again if the temperature is raised during dark reactions, the rate increases invariably. This also proved that light reactions are photochemical reactions which involve light, and dark reactions are chemical reaction which do not involve light.
When does photosynthesis occur?
Photosynthesis is the process which is used by plants to prepare their own food, as they are autotrophs. It occurs in day time because for the photosynthesis to take place, two things are required:
1 sunlight (that's why it take place in day time)
2 chorophyll(which is present in green plants)
Photosynthesis only takes place in green plants.
Where is photosynthesis cell located?
Well, actually photosynthesis is the conversion of light energy into chemical energy by living organisms, that is absorption of light by chloroplasts in mesophyll cells in interior of (second layer) leaves
Does Photosynthesis use the carbon from carbon dioxide gas to help make organic food?
Photosynthesis is what happens when a plant uses sunlight to create food from carbon dioxide and water. Although the food is technically organic, it is not food for human consumption, but for the plant to sustain its own life. Photosynthesis helps generate oxygen.
Where does each step of respiration takes place?
C6H12O6+602=6CO2=6H2O=ENERGY C6H12O6+602=6CO2=6H2O=ENERGY C6H12O6+602=6CO2=6H2O=ENERGY C6H12O6+602=6CO2=6H2O=ENERGY
What happens during dark reaction phase and light reaction phase in photosynthesis?
In the light reaction phase of photosynthesis, light energy is converted into chemical energy in the form of ATP and NADPH. These energy carriers are then used in the dark reaction phase, also known as the Calvin Cycle, to convert carbon dioxide into glucose. The dark reaction does not require direct light and takes place in the stroma of the chloroplast.
Do a pH test. The more CO2 consumed (photosynthesizing) the higher the pH. The more CO2 produced (Respiring) the lower the pH. And if a plant is photosynthesizing and respiring at the same rate, the pH will remain level. During a lab like this, we used bromothymol blue to test the pH levels. It will turn yellow if pH <7, blue if pH >7, and Green as the solution changes from acid to base or base to acid.
What is the waste product of photosynthesis?
The waste product of photosynthesis is oxygen. During photosynthesis, plants take in carbon dioxide and water, and, using sunlight, convert it into glucose (sugar) and oxygen. The oxygen is released into the atmosphere as a byproduct.
What organisms complete photosynthesis?
Plants, algae, and some bacteria are organisms that can complete photosynthesis. They use chlorophyll to convert sunlight, water, and carbon dioxide into glucose (sugar) and oxygen, which are essential for their growth and survival.
What are the building blocks of sugar?
The building blocks of sugar are monosaccharides, which are simple sugars like glucose, fructose, and galactose. These monosaccharides can combine to form more complex sugars like disaccharides (e.g., sucrose, lactose) or polysaccharides (e.g., starch, cellulose).
Would a fully oxidized or fully reduced molecule be a better cellular energy source?
A fully reduced molecule would be a better cellular energy source because it has more energy stored in its chemical bonds compared to a fully oxidized molecule. Oxidation leads to the release of energy stored in chemical bonds, while reduction stores energy in those bonds.
What is the process in which sugar is formed in photosynthesis are broken into simpler molecules?
The process in which sugar is formed in photosynthesis is called carbon fixation. During this process, carbon dioxide molecules are taken in by plants and converted into simple sugar molecules through a series of chemical reactions catalyzed by enzymes. These sugar molecules serve as the primary energy source for the plant and are essential for its growth and development.
What are the two stages of photosynthesis?
The two stages of photosynthesis are the light dependent and the light independent. During the light reactions, light is converted into energy by a process of transferring electrons to and from a special chemical called NADP. In the light independent stage, called the Calvin Cycle, which uses that energy to change carbon dioxide into sugars for the cell's use.
Do cotton plants use photosynthesis?
Yes, cotton plants do use photosynthesis. Photosynthesis is the process by which plants convert sunlight into energy, and cotton plants are no exception. They use this energy to produce the nutrients they need to grow and develop.
Where does photosynthesis occur what cell organelle?
Photosynthesis occurs in the chloroplasts of plant cells. Chloroplasts are specialized organelles that contain chlorophyll, a pigment that captures light energy and converts it into chemical energy in the form of glucose.
photolysis, or photodecomposition is a chemical reaction in which a chemical compound is broken down by photons. It is defined as the interaction of one or more photons with one target molecule.
How do algae get their food out of photosynthesis?
Algae obtain their food through photosynthesis, where they use sunlight, carbon dioxide, and water to produce sugars for energy. Algae have chloroplasts that contain chlorophyll, the pigment responsible for capturing sunlight and converting it into chemical energy. This process allows algae to make their own food and sustain their growth and metabolism.
What is the role of ATP in coupled reaction?
ATP is used as an energy carrier in coupled reactions. It provides the energy needed for endergonic (energy-requiring) reactions to proceed by transferring a phosphate group to the substrate, making it more reactive. This coupling of an exergonic (energy-releasing) reaction with an endergonic one allows cells to efficiently carry out their metabolic processes.
