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Because the plant is bring water out of the soil to " crack " for its electrons ( among other things ) to replenish the electrons in the pigment chlorophyll.
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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.
The rate at which materials enter and leave through the cell membrane depends on the cells surface area?
small molecules (H2O) pass through the membraine easily where as larger or more complex molecules do not run through as easily.
Give an example of how cohesion among water molecules is important to living things?
Cohesion is the attraction or holding together of molecules of the same substance. It affects living organisms through water, which also has adhesion (holding together of molecules of different substances). A combination of cohesion and adhesion creates capillary action, the ability for water (or any liquid) to run along a surface. (basically, it allows water to climb up small tubes. YAY ME! :)
Why is chloroplast important to the plant?
Chloroplasts, as there are many in the plant, are present mostly in the palisade cells near the upper epidermis (or surface) of the plant. They are important as they contain a green pigment called chlorophyll, which is used by the plant in photosynthesis, which is the process the plant uses to make food, in the form of carbohydrates, from sunlight, using water and carbon dioxide.
What does antiparallel mean?
Anti-parallel means the sides of the DNA double helix.
Why are the electrons important?
WHY is is what makes up an atom which makes up molecules which makes up us in the long run
Why doesnt chlorophyll run out of electrons during the electron transport chain?
The reduced quinone (QH2) is reoxidized to Q by complex III of the respiratory electron-transport chain (Section 18.3.3).
How was an medievil castle run?
they dont have legs so they dont run!?!?!?!?!?!
How do you choose where to run in the Wii fit run?
you dont run oops sorry i dont know
What not to do during a hurricane?
Dont panic!..., Dont run away in circles. Dont run toward the hurricane it will kill you!
How do fish run?
They dont run,they swim
What should you do if you run from a cop?
Dont run.
How is it that the light reactions do not run out of electrons?
jose joes
Why doesn't the photo-system run out of electrons?
Because electrons are obtained from water. Process is called photolysis
How do crocodiles run?
they dont..
What do you do if the prisoner doesn't run to you?
Run after them but dont let it consume you
How can you protect an egg from cracking?
someone catches it, parachute or whatever you could think of tbh this was no help at all what so ever welllzzz you can put it in a ceral box or pu tit in a shoe box and foam inside it.....
