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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
Why is water essential for plant growth?
water is essential for the following reasons:
Solvent
Water acts as the solvent for the minerals present in the soil and with the absorption of water from the soil minerals also enters the plant body. While these minerals could not be easily and naturally taken up by the plants if they were in solid state.
Transport
Water is used to transport the metabolic products from one part to the other where they are needed. So it acts as a vehicle for the transportation.
Photosynthesis
Photosynthesis is a process in plants to make their food. And water is an electron source of this process.
6CO2 + 6H2O â€" C6H1206 + 6O2
In this process six water molecules combine with six carbon molecules to form, oxygen and glucose (food for plants)
Evaporation
Water is evaporated through the stomata present on the leaves. It cools the plant in the hot sunny days, in the similar manner as we get cool by perspiration. Roots also store the water to be used in winter. In cold days water movement from the soil is very slow but the leaves loses water by wind in the winter too. So the stored water helps the plant to compensate with it. If no water is available to the plant then the tissues will start dying in the leaves and they will turn brown in color. Evaporation is also necessary for plant to let the stomata remain open for the intake of carbon dioxide.
Turgidity
Water is necessary for the turgidity i.e. the pressure of water in the cells of plants which is important for the survival of plant else it will wilt. It is also required for the growth as it expands the plant cells.
While the products of the light reactions, ATP and NADPH, are not explicitly shown in the overall chemical equation for photosynthesis, they are crucial for the dark reactions (Calvin cycle) where they provide the energy and reducing power needed to convert carbon dioxide into glucose. The overall equation for photosynthesis simplifies the process and highlights the conversion of carbon dioxide and water into glucose and oxygen.
What pigment is responsible for photosynthesis?
Chorophyll a is essential.It is needed to direct photosynthesis.
Besides food what other materials are useful to humans that are products of photosynthesis?
Some materials useful to humans that are products of photosynthesis include wood for construction and paper, biofuels such as ethanol and biodiesel for energy, and natural fibers like cotton and hemp for clothing. Oxygen released during photosynthesis is also essential for human respiration.
The end products of photosynthesis are?
Photosynthesis is the process by which a plant makes its own food. The end result of photosynthesis is the production of glucose to feed the plant, and the production of oxygen, for humans to breathe.
Summary equation for photosynthesis?
6 H2O + 6 CO2 --------> C6H12O6 + 6 O2
EQUATION OF PHOTOSYNTHESIS.
This reaction needs day - or sunlight in is, in many step reactions, carried out in (green) plants; chlorophyll is an important and essential intermediate, making light energy available for some of the energy consuming steps herein.
How does ATP and NADPH contribute to photosynthesis?
ATP and NADPH are used to synthesize in the presence of light this is call light depending reaction. ATP and NADPH are also used to synthesize glucose in the absence of light ths is called the Calvin-Benson cycle. ATP and NADPH are used to synthesize glucose in the presence of light this is call light depending reaction. ATP and NADPH are also used to synthesize glucose in the absence of light ths is called the Calvin-Benson cycle.
Oxygen is the atmospheric gas that is produced as a by-product of the light reaction of photosynthesis and is essential for aerobic respiration in organisms. Oxygen is used in cellular respiration to break down glucose and produce ATP, providing energy for various cellular functions.
How do decomposers help in the process of photosynthesis?
Decomposers break down dead organisms and organic matter into nutrients like nitrogen and phosphorous. These nutrients are then released into the soil, which can be absorbed by plants to help them grow and undergo photosynthesis. Therefore, decomposers indirectly support photosynthesis by recycling essential nutrients back into the ecosystem.
What plants do with the sugar they produce in photosynthesis?
Plants use the sugar they produce in photosynthesis as a source of energy for various biological processes, including growth, reproduction, and maintenance. Additionally, plants store excess sugar in the form of starch for later use, and some sugar is also used in building cell walls and structures.
Energy source of photosynthesis?
the sun since it is white light it has more color. plants have better photosynthesis when in blues and reds light which are absorbed. green is not used so it is reflected giving the color of green in most plants.
Oxygen is the important molecule that is released when water is split during the light reactions of photosynthesis. This process, known as photolysis, provides the oxygen necessary for cellular respiration in plants and other organisms.
Why is the excess glucose that is not used in plants stored as starch?
Starch is needed to store glucose because starch is thousands of glucose linked together to form the polysaccharide 'starch', and is a more efficient way to store glucose than thousands of individual glucose molecules free floating around.
How many co2 are released during Calvin cycle?
co2 isn't released in the Calvin cycle it takes in 3 co2 to produce one G3P molecule and does that twice to produce C6H12O6
Does Chlorophyll absorb green wavelengths?
Chlorophyll primarily absorbs blue and red wavelengths of light for photosynthesis, while reflecting green wavelengths, which is why plants appear green. Some chlorophyll types can absorb a small amount of green light, but the efficiency is much lower compared to blue and red light absorption.
What substance are taken by plants and for photosynthesis?
Well, photosynthesis happens when plants absorb sunlight, co2 or carbon dioxide, and water. That material is turned into glucose that goes through cellular breakdown, eventually being turned into energy for the plant.
Which organelle carries out photosynthesis converting light into chemical energy?
Chloroplasts are the organelles that carry out photosynthesis in plant cells, converting light energy into chemical energy in the form of glucose. They contain chlorophyll, a pigment that absorbs light and initiates the process of photosynthesis.
What greenhouse gas is given off during decomposition?
Carbon dioxide (CO2) is released during the decomposition process as organic matter breaks down and is broken down by bacteria and fungi.
Is the palisade layer where most photosynthesis in a leaf occur?
Mesophyll tissue forms the bulk of the leaf. It makes up the green tissue of the leaf and consists of thin-walled cells containing chloroplasts (bits that contain the chlorphyll). In most dicot plants, the mesophyll is differentiated into palisade parenchyma and spongy parenchyma. The palisade parenchyma consists of thin-walled cells which are usually cylindrical. These cells contain large numbers of chloroplasts - the organelle used for capturing light and subsequesnt photosysnthesis.
The spongy prenchyma, however, contains far fewer chloroplasts, so its main function is not photosynthesis. The spongy parenchyma has an open and net-like structure with large inter-cellular spaces that facilitate gas diffusion. The major function of the spongy parenchyma is the transport of oxygen, carbon-dioxyde and water vapour. It also is involved in the transport of water and the products of photosynthesis, the sugars. The spongy parenchyma is in close connection with the vascular bundles and the palisade parenchyma. When no clear differentiation exists between palisade and spongy parenchyma, the tissue is called mesophyll.
Read more: http://wiki.answers.com/Why_is_the_palisade_layer_where_most_photosynthesis_occur#ixzz18UOwDLzu
What is light in photosynthesis?
In photosynthesis, light is a form of energy that is absorbed by chlorophyll in the chloroplasts of plant cells. This light energy is essential in the process of converting carbon dioxide and water into glucose and oxygen.
Which type of cell is capable of harnessing energy from sunlight?
Chloroplasts, the cellular organelles found in plant cells and some other types of cells, are capable of harnessing energy from sunlight through the process of photosynthesis.
What type of organisms can go through photosynthesis?
Green plants go through photosynthesis. Green plants contain a green pigment called chlorophyll. Well, chlorophyll is actually stored in chloroplasts of plant Cells. Chlorophyll traps sunlight to make food for the Plant. This process is called photosynthesis.
What Three things are necessary for photosynthesis to happen?
Three things necessary for photosynthesis to occur are sunlight, water, and carbon dioxide. In the presence of chlorophyll, these three components are used by plants to produce glucose, which is the energy source for the plant.
Before photosynthesis can take place light must be what by plants?
Before photosynthesis can take place, light must be absorbed by plants. Plants contain pigments, such as chlorophyll, that are capable of capturing light energy and converting it into chemical energy during the photosynthesis process.
When was the first photosynthesis?
Well the first photosynthesis was at the start of time because otherwise we wouldn't have any air and therefore not be alive. So to say is simply photosynthesis has been around forever just like trees.
This is not correct at all.....completely false.
i think the first thing to photosynthesise was bacteria, it may be called cyanobacteria, i am not completely sure. but no, things have not been photosynthesising forever as the temperature did not cool down enough for millions or billions of years, and put it this way, humans did not evolve for billions of years, so we werent made when the earth was "formed"
