0
What else can I help you with?
When light is absorbed by chlorophyll molecules the excited electrons leave the molecule What is the source of electrons that makes chlorophyll stable again?
The source of electrons that makes chlorophyll stable again is water. The process of photosynthesis involves the splitting of water molecules to provide electrons, which are then used to replace the electrons lost from the chlorophyll molecule during absorption of light.
Where did the electrons used in the light dependent process come from?
The electrons used in the light-dependent reactions of photosynthesis come from water molecules (H₂O). When light energy is absorbed by chlorophyll in the thylakoid membranes of chloroplasts, it energizes electrons, which are then stripped from water molecules during a process called photolysis. This process not only releases oxygen as a byproduct but also provides the energized electrons needed to drive the subsequent reactions in the photosynthetic pathway.
What materials come into the chloroplast that used in the light dependent reactions?
The materials that enter the chloroplast for use in the light-dependent reactions include water molecules and light energy. Water is split into oxygen, protons, and electrons, while light energy is absorbed by chlorophyll to initiate the photosynthetic process.
Where do water and light come from in light dependent reactions?
In light-dependent reactions of photosynthesis, water (H₂O) is sourced from the plant's roots, where it is absorbed from the soil. Light energy is captured from sunlight by chlorophyll and other pigments in the thylakoid membranes of chloroplasts. This energy splits water molecules into oxygen, protons, and electrons, with oxygen being released as a byproduct. The electrons are then used to generate energy-rich molecules like ATP and NADPH.
Where does the H2O come from in the light reaction?
In the light reactions of photosynthesis, water (H2O) is sourced from the surrounding environment, typically from soil and absorbed by plant roots. When light energy is captured by chlorophyll in the chloroplasts, it splits water molecules into oxygen, protons, and electrons in a process called photolysis. The oxygen is released as a byproduct, while the protons and electrons are used in the subsequent stages of photosynthesis to produce energy-rich compounds.
How chlorophyll traps sunlight and converts it to chemical energy?
First of all, chloroplasts are what convert the sun into ATP, which is the basic universal form of energy.Chloroplasts are able to capture solar energy to perform photosynthesis, the reduction of carbon dioxide to simple carbohydrates.They contain chlorophyll to allow photosynthesis to occur.Light absorbed by Chlorophyll excites the electrons. Different wavelengths of light excite the electrons by different amounts. The energy in the 'excited electrons' can be passed from one chlorophyll molecule to another, but in the end it will just be lost as fluorescence (ie the energy will be re-emitted as light), unless the excited electron itself can be ejected from the chlorophyll molecule.This process of electron ejection takes place only in chlorophyll molecules which are specifically held in a special protein complex called a reaction centre. There are two different sorts of reaction centres in plants. In each of these reaction centres, the ejected electron is transferred to an acceptor molecule, which can then pass it on to a different molecule and eventually the electron(s) can be used to fix carbon dioxide. However, you can't keep on ejecting electrons from these special chlorophyll molecules, electrons must be fed back in to replace those ejected. These electrons come from water, resulting in oxygen being evolved. So, basically, solar energy excites electrons which bind molecules into useable substances. (ie ATP) Hope this helped =)
When light is absorbed by chlorophyll molecules the excited electrons leave the molecule What is the source of electrons that makes chlorophyll stable again?
The source of electrons that makes chlorophyll stable again is water. The process of photosynthesis involves the splitting of water molecules to provide electrons, which are then used to replace the electrons lost from the chlorophyll molecule during absorption of light.
Where do the electrons in a covalent bond come from?
The electrons in a covalent bond come from the outer energy levels of the atoms involved. Each atom contributes one or more electrons to be shared between them. This sharing creates a stable electron configuration for both atoms.
What materials come into the chloroplast that used in the light dependent reactions?
The materials that enter the chloroplast for use in the light-dependent reactions include water molecules and light energy. Water is split into oxygen, protons, and electrons, while light energy is absorbed by chlorophyll to initiate the photosynthetic process.
Where does cholrophyl come from?
Chlorophyll , comes from the plant, however it takes the chemical process of the sun giving the plant energy.
Were does the kinetic energy of moving electrons come from?
The kinetic energy of moving electrons comes from the electromagnetic force exerted on the electrons as they interact with other charged particles in the material they are moving through. This force accelerates the electrons, giving them kinetic energy.
Where do the high-energy electrons carried by NADPH come from?
Photosystem 1
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.
Where do electrons come from and how it gains energy during the light reaction?
They come from Photosystem ll. Photosystem ll gets them by ripping the electrons off of water by a process called photolysis. Electrons gain energy first in Photosystem ll, then later in photosystem l, through the absorption of energy from light.
What is the relationship between chlorophyll and the color of plants?
Chlorophyll is a pigment that gives plants their green color. It absorbs light energy for photosynthesis, the process by which plants produce their own food. The presence of chlorophyll is what makes most plants appear green.
What allows photosynthetic organisms to capture solar energy?
Plants algae and bacteria capture sunlight after capturing they use metabolism to convert them in to energy. They do this when electrons get excited and jump off chloroplast into thylakoid membrane, the electrons have to be replaced so they steal them from CO2 and all that is left is oxygen and they release it.
Where do the electrons used in the light dependent process come from?
A photon of light strikes chlorophyll and an excited electron is energized to a higher level and enters the transport chain. Now, here is the ultimate reason plants use water. ( aside from turgidity and other processes ) The plant " cracks " water to get electrons to replace the electrons excited from the pigment of chlorophyll. The oxygen then becomes so much waste.
