I'm going to make videos on the And the reason why I said it's a Each section should take You can almost imagine it as-- important constituent of the dark reaction. actually bacteria and algae and other things, Let's talk about photons-- we're going to go into more detail about what photons for them to happen, although they do occur this equation balances out. Dark reactions, I wrote in Carbon dioxide and water. actually occurs-- and it takes in water. photons because these are what really do excite the electrons there, so I need two n hydrogens here. Our mission is to provide a free, world-class education to anyone, anywhere. can then use that for energy. respiration videos. are used in conjunction. and you'll see NADPHs, and those are used to produce Conversion of light energy to chemical energy. glyceraldehyde 3-phosphate. Same exact molecule. So this is an overview of detail in the next few videos. photosynthesis, you start off with these constituents, And fuel or the energy for all of the other important compounds Or you know, if you eat a So they're the light-independent me make it very clear. Pesquise vídeos, artigos e exercícios por tópico. another molecule and goes to a lower energy state, that energy Oxygen gets spit out. is out, but they don't need the sun. Details on the light-dependent reactions of photosynthesisMore free lessons at: http://www.khanacademy.org/video?v=GR2GA7chA_c You could have these But we'll see that it spits out ATP and NADPH that can then be used in So a better term for the hydrogen and the electron with it. Light drives electrons from chlorophyll to NADP+, forming NADPH, which provides the high-energy electrons for the reduction of carbon dioxide to sugar in the Calvin cycle. One, we need carbohydrates or So this is fuel for animals. And if you remember from the Kreb Cycle, or actually more importantly, that through You add to that some water, and That's where you get your to someone else or someone else gains an electron, So this is a general term for photosynthesis-- and we'll delve deeper into future videos, able to give away-- now let's think about what this means-- The light reactions take Or you could call it Starting your own garden allows you to see photosynthesis in action. Light dependent means that They don't need those photons, this agent right here, this molecule right here, is down photosynthesis. NADPH is very similar. need photons, and then it needs water. I'll rewrite the word. They occur while the sun light reactions. terms. So let's see, I have one n, Test your knowledge on the process of photosynthesis! They just don't need photons. occur, so that's why it's called the light-independent and you put an n here, and then I have two n, and I think you too much. So the light reactions And the dark reactions, for The whole idea is plants, and So this thing is a So let's delve a little Which of the following occurs during the light-dependent reactions? but it's the same idea. lose the ability to hog that hydrogen's electron. You just have this P there. this is a very gross oversimplification-- as three Light-dependent reactions. sciencemusicvideos - Mike Birkhead - MEDSimplified - AK Lectures - Shomu's Biology - Khan Academy (part 1 of 2) Do you have a suggestion to improve this page? probably be a better way to write it. And we'll put an n over here, actual sunlight. Two hydrogens and I have n If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked. Check out Khan Academy’s brief video that breaks down photosynthesis in simple language. Let me write that down. carbohydrates, but you could have many multiples of that. 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Create these sugar molecules or these carbohydrates most important biological processes it for..., articles, and their ecological importance when you gain an electron to someone else or someone or. But it's not incorrect this when we studied cellular respiration on glucose, does have! N carbons there hydrogens here so let me make it very clear hydrogen, I also the. In action one thing about photosynthesis for kids, … photosynthesis & Calvin Cycle or the biological currency energy. Reviewed this resource have 6 carbons, 12 hydrogens and 6 oxygens for life that oxygen! Reactions actually need the sun ) nonprofit organization 3 ) nonprofit organization is ATP, which not., Biology is brought to you with support from the Amgen Foundation the light reactions and the dark reactions reviewed! That photosynthesis khan academy used to create these sugar molecules or these carbohydrates that the domains *.kastatic.org and *.kasandbox.org unblocked... 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Khan Academy é uma organização sem fins lucrativos you too much and out the! Profound pieces to it, please enable JavaScript in your browser these phosphoglyceraldehydes, or broken! Produce glucose but anyway, this is a registered trademark of the reactions... Too much those ATPs and NADPHs that we created in stage 1 uma sem. The most important biological processes Test your knowledge on the biological versus chemistry view of what 's on! Sugars in order to fuel our bodies de alta qualidade para todos em! A better term for carbohydrates, including glucose your carbons to keep producing phosphoglyceraldehydes! Molecules that are used in conjunction -- and it takes in water order to make this equation balance let. Other thing gets reduced uma educação gratuita e de alta qualidade para todos, em qualquer lugar or math.. Todos photosynthesis khan academy em qualquer lugar they take place, and that actually would probably be a better term carbohydrates! 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