scroll to top
Stuck on your essay?
Get ideas from this essay and see how your work stacks up
Word Count: 999
By definition photosynthesis is the trapping of sunlight energy and its conversion to chemical energy followed by synthesis of sugar phosphates that become converted to sucrose cellulose starch and other end products In plants photosynthesis takes place in the chloroplasts Chloroplasts are formed of two membrane layers the stroma and the grana The two outer membranes surround the stroma which is the semi-fluid interior of the chloroplast A membrane runs through the stroma and forms the grana The grana are stacks of thylakoid disks that hold photosystems The two stages of photosynthesis happen at two different points in the chloroplast At the inner membrane system light is absorbed into the chloroplast and ATP adenosine triphosphate is formed This set of reactions is known as the light-dependent reactions Light is absorbed by different photosynthetic pigments in the stroma The two different pigments are chlorophylls and carotenoids The difference between these two pigments is that chlorophylls are green and carotenoids can be orange red or yellow It is these two pigments that give plants their color In the stroma the second part of photosynthesis known as the light-independent reactions is completed Here in what is also known as the synthesis stage sugars starch and other organic compounds are combined Size and shape of the leaf of the plant can either aid or hinder the photosynthesis that goes on in that leaf The light independent reactions involve three different steps The first step which is called photoionization is the giving up of electrons by the pigments When light hits pigments of the photosystems an electron and its energy is given off While the electron moves around the cell on its way to the chlorophyll reaction center it gives off energy Very quickly the electrons energy matches the wavelength that can react with the chlorophyll a The photosystem will then take the energy that the electron acquired after being released from the pigment and transfer it to an
@Kibin is a lifesaver for my essay right now!!
- Sandra Slivka, student @ UC Berkeley
Wow, this is the best essay help I've ever received!
- Camvu Pham, student @ U of M
If I'd known about @Kibin in college, I would have gotten much more sleep
- Jen Soust, alumni @ UCLA