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Photosynthesis To produce ATP, light energy must first be captured. Within the leaf, there are two sets of pigments that are responsible for this.

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Introduction

Photosynthesis: In its essence, photosynthesis is the process by which plants make their chemical energy. Most people think that the equation for photosynthesis is the complete process, though there are several steps until the ATP can be made. To produce ATP, light energy must first be captured. Within the leaf, there are two sets of pigments that are responsible for this. The first set is Chlorophyll; > Chlorophyll A which absorbs the yellow-green part of the spectrum > Chlorophyll B which absorbs the blue-green part of the spectrum The second set is Carotenoids; > � Carotene which absorbs the orange in the spectrum. > Xanthophyll which absorbs yellow from the spectrum. ...read more.

Middle

Chloroplasts are the organelle responsible for trapping the light. Within the chloroplasts are a structure called Grana which consist of several Thylakoids. It is inside this thylakoid membrane that the process begins, there is a 'funnel' in which at the bottom there is primary pigment (Reaction Centre), along the side are many primary pigments, these absorb the various different wavelengths in the light and pass down the chemical energy down to the reaction centre...this ensures that no energy is lost during the process, it also makes the process more efficient, as it ensures that no light energy passes through without being harnessed. There are two types of reactions, Light Dependant and Light Independent. ...read more.

Conclusion

The NADPH made in Photosystem II is then used in the light independent reaction, if need be. Photosynthesis is an essential chemical process that must take place in order for organisms such as us to survive. The process of photosynthesis releases oxygen and absorbs CO2 from the atmosphere which maintains a balance within the atmosphere. This balance however is being disrupted by the cutting down of trees, leading to excess pollution in the air. The excess of these gasses is thought to be the cause of the Greenhouse effect. The greenhouse effect has become more and more apparent as our society has become increasingly industrially based; this is due to factors such as deforestation. Plants are also a primary source of energy, as animals cannot photosynthesise and so consumed plants (phototrophs) for the energy that they produced. ...read more.

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