How Does Photosynthesis Happen?
The Plants absorbs carbon dioxide from the air – through its leaves, through these tiny little pores called stomata. Stomata is surrounded, like you can see, by guard cells. The water, vitamins, and minerals required as raw material are absorbed by the roots and is then transported from the roots through the stems to its branches and finally to the leaves where most plants carry out this process of making the food or the process of photosynthesis.
Now if you are given only egg and cheese, you would have a hard time, making an omelet without the pan, flame, and spatula. Right? Especially, if you are not given the flame, the egg would never cook. Right? The same goes for photosynthesis. Having carbon dioxide and water alone is not enough. The sunlight, the energy source for this process is also important.
Now we can go microscopic. Let’s start looking at the cellular level. Let’s follow up the carbon dioxide molecule through the stomata and see where it goes. Mr. Winyin is going to help me out here. Now we are entering the plant cell. What you see here is the cell wall. Go slightly inside. There you see the cell membrane which encloses all the contents of the cell. Just make sure that the contents with cell don’t spill out. Aha, now we have just entered into the cell. There is the nucleus. Remember? The headmaster that we just spoke about. That’s the nucleus.
And now do you see the jelly-like substance surrounding all the cell contents? This is the cytoplasm. And finally, what’s that small little green thing that I see? Ah! That’s the chloroplast. This chloroplast has a green pigment inside called the Chlorophyll. This is our main character — extremely important. How important do you think James Bond is to a James Bond movie…pretty much that important is chlorophyll to a chloroplast. Chlorophyll is the reason why most of the plants that you see around or green in colour.
Thank you Winyin for getting into the cell and helping us understand all the parts of the cell. I will take it over from here. In fact, let me now allow the chlorophyll to talk to you.
Chlorophyll Molecule: I am a miracle molecule who is fantastic at absorbing light. My talent might even make me the single most important chemical on the planet. I drink in energy from the sun and use it to power the production of sugar — food for a plant and ultimately for all things on earth. And if that isn’t’ enough, this process called photosynthesis is also produces the oxygen that all animals breath and then sucks up the nasty greenhouse gas carbon dioxide. I put the green in greenery I live inside the chloroplast, tiny little green globes rammed inside the cells of a leaf.