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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
Location where photosynthesis occurs?
Photosynthesis takes place in the cells of green plants.
The process of photosynthesis is carried out in the chloroplasts. More specifically, the light reaction takes place in the thylakoid membrane, while the dark reaction (light independent) takes place in the stroma.
What is the first most immediate thing that happens when light strikes a chlorophyll molecule?
When light strikes a chlorophyll molecule, electrons in the chloroplast get excited.
What kind of light drives photosynthesis?
Plants primarily use visible light, with red and blue wavelengths being the most effective for driving photosynthesis. Green light is less efficient because it is reflected by chlorophyll.
What are the five major branches of chemistry?
there are five branches: inorganic, organic, analytical, physical, and biochemistry. they could be further broken down into sub-branches such as organometallic chemistry, physical organic chemistry, electroanalytical chemistry, and so on and so forth.
What are stacks of thylakoids called?
granum are stacks of thylakoids.
grana are several stacks of thylakoids. :)
Why is photosynthesis necessary of plants?
Photosynthesis is necessary for plants because it is the process by which they convert sunlight, water, and carbon dioxide into glucose (sugar) and oxygen. Glucose is used by the plant as energy for growth and other metabolic processes, while oxygen is released into the atmosphere for other organisms, including humans, to breathe. Without photosynthesis, plants would not be able to produce their own food and sustain themselves.
How do your cells get oxygen glucose and the raw materials that they need to respire?
Cells get oxygen through the bloodstream, where red blood cells carry oxygen from the lungs to the cells. Glucose and other nutrients are also transported through the bloodstream after being broken down from the food we eat during digestion. This process ensures that cells have the necessary raw materials to undergo cellular respiration and produce energy.
What is the relationship between photosynthesis and respiration?
In photosynthesis plants use the suns energy as light to give carbon dioxide and water into glucose's. In cellular respiration glucose is ultimately broken down to slow down and or stop carbon dioxide or water, and the energy from this is ATP energy
Photosynthesis stores energy in complex organic molecules, while respiration releases it.
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).
