0
cell wall
Wiki User
∙ 10y ago
Add your answer:
Earn +20 pts
What happens in the chloroplast of a cell?
It is the site of protein synthesis.It converts light energy into chemical energy.
What enables green plants to convert light energy into chemical energy?
chloroplasts ^yes, organelles called chloroplasts which contain a green pigment named chlorophyl. Chloroplasts undergo photosynthesis, in which light excites electrons in photoreceptors and their energy is used to convert CO2 and H2O into O2 and Glucose (C6H12O6)
How is light energy processed in the light reaction of photosynthesis?
In simple terms, photosynthesis is the conversion of carbon dioxide (CO2) to carbohydrate (CH2O). To do this two things are needed: energy to drive the reaction and a source of hydrogen. The light reaction of photosynthesis produces two essential substances: ATP and NADPH. ATP provides the energy for the conversion of CO2 to CH2O, and NADPH provides the hydrogen. The light reaction depends on groups of chlorophyll molecules, called photosystems, absorbing light energy. The energy is used to eject high energy electrons from the chlorophyll. The energy in the electrons is then used to make ATP and NADPH. There are two photosystems, called photosystem I (PSI) and photosystem II (PSII), which work in sequence. (PSII comes before PSI in the sequence, but they were discovered and named in the reverse order!). PSII absorbs light and emits a high energy electron. The energetic electron then passes down a series of molecules, called an electron transport chain (ETC), releasing energy as it goes (you can visualise it as a ball bouncing down a set of stairs, losing energy as it falls). The energy released is used to make the energy carrier compound ATP. To replace the electrons lost from chlorophyll in PSII water (H2O) is split into hydrogen ions (H+), electrons (e-) and oxygen atoms (O): H2O = 2H+ + 2e- + O This is the source of the oxygen released by photosynthesis. The second photosystem, PSI, also absorbs light and emits a high energy electron from chlorophyll. The energy in this electron is used to drive the synthesis of NADPH from NADP+ ,hydrogen ions (H+) and electrons (e-): NADP+ + 2H+ + 2e- = NADPH + H+ The hydrogen ions needed for this come from the water which was split by PSII. The electrons lost from the chlorophyll in PSI are replaced by the electrons ejected from PSII. The result of all this is that light energy is converted into chemical energy in ATP, water is split to provide the hydrogen needed to make NADPH, and oxygen is released as a waste product. The ATP and NADPH are then used in the light independent reaction (the Calvin cycle) to concert carbon dioxide into carbohydrate.
What is the importance of light in photosynthesis?
The equation of photosynthesis is as below:Carbon dioxide + Water ---------> Glucose + OxygenThis 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) ---------> NADPHThis 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 ---------> ATPThis 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.
C-4 photosynthesis is so named because?
it produces a three carbon compound as the first stable product of photosynthesis
What happens in the chloroplast of a cell?
It is the site of protein synthesis.It converts light energy into chemical energy.
What part of plants absorb light energy?
The chloroplasts.
In photosynthesis plant cells use what to trap light energy and produce glucose?
photosynthesis is the process of how plants use carbon dioxide, water and sunlight and with the help of the chlorophyll (i probably spelled it wrong) cells convert all that into energy or calories. their "waste" is oxygen.
What enables green plants to convert light energy into chemical energy?
chloroplasts ^yes, organelles called chloroplasts which contain a green pigment named chlorophyl. Chloroplasts undergo photosynthesis, in which light excites electrons in photoreceptors and their energy is used to convert CO2 and H2O into O2 and Glucose (C6H12O6)
How is light energy processed in the light reaction of photosynthesis?
In simple terms, photosynthesis is the conversion of carbon dioxide (CO2) to carbohydrate (CH2O). To do this two things are needed: energy to drive the reaction and a source of hydrogen. The light reaction of photosynthesis produces two essential substances: ATP and NADPH. ATP provides the energy for the conversion of CO2 to CH2O, and NADPH provides the hydrogen. The light reaction depends on groups of chlorophyll molecules, called photosystems, absorbing light energy. The energy is used to eject high energy electrons from the chlorophyll. The energy in the electrons is then used to make ATP and NADPH. There are two photosystems, called photosystem I (PSI) and photosystem II (PSII), which work in sequence. (PSII comes before PSI in the sequence, but they were discovered and named in the reverse order!). PSII absorbs light and emits a high energy electron. The energetic electron then passes down a series of molecules, called an electron transport chain (ETC), releasing energy as it goes (you can visualise it as a ball bouncing down a set of stairs, losing energy as it falls). The energy released is used to make the energy carrier compound ATP. To replace the electrons lost from chlorophyll in PSII water (H2O) is split into hydrogen ions (H+), electrons (e-) and oxygen atoms (O): H2O = 2H+ + 2e- + O This is the source of the oxygen released by photosynthesis. The second photosystem, PSI, also absorbs light and emits a high energy electron from chlorophyll. The energy in this electron is used to drive the synthesis of NADPH from NADP+ ,hydrogen ions (H+) and electrons (e-): NADP+ + 2H+ + 2e- = NADPH + H+ The hydrogen ions needed for this come from the water which was split by PSII. The electrons lost from the chlorophyll in PSI are replaced by the electrons ejected from PSII. The result of all this is that light energy is converted into chemical energy in ATP, water is split to provide the hydrogen needed to make NADPH, and oxygen is released as a waste product. The ATP and NADPH are then used in the light independent reaction (the Calvin cycle) to concert carbon dioxide into carbohydrate.
What enables plants to convert light energy to chemical energy?
chloroplasts ^yes, organelles called chloroplasts which contain a green pigment named chlorophyl. Chloroplasts undergo photosynthesis, in which light excites electrons in photoreceptors and their energy is used to convert CO2 and H2O into O2 and Glucose (C6H12O6)
Which scientist investigate how plants make food?
A meteorologistA plant physiologist named Calvin investigated light eactions of photosynthesis and dark reactions were discovered by Blackmann.
What does the chloroplast do on a plant?
It is making food. It named as photosynthesis.
Why do light coloured objects reflect radiation more than dark coloured objects?
Because dark colours absorbs light, and energy;and its named absortion coefficient. ============================== Some substances and objects made from them reflect more light and absorb less. Other substances and objects made from them reflect less light and absorb more. The ones that reflect more and absorb less are the ones that appear lighter to us. Why ? Because they absorb less light and reflect more of it toward our eyes.
What is the importance of light in photosynthesis?
The equation of photosynthesis is as below:Carbon dioxide + Water ---------> Glucose + OxygenThis 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) ---------> NADPHThis 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 ---------> ATPThis 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.
C-4 photosynthesis is so named because?
it produces a three carbon compound as the first stable product of photosynthesis
Did James Prescott Joule's last name have anything to do with joules?
The unit of energy, "Joule", was named in his honor.The unit of energy, "Joule", was named in his honor.The unit of energy, "Joule", was named in his honor.The unit of energy, "Joule", was named in his honor.
