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The Influence Of Light On Photosynthesis

1680 words - 7 pages

Sarah Mayne
The influence of light on Photosynthesis

Table of contents
Front page and table of contents
Page 1
Page 2
Review of literature
Page 3 and 4
Methodology and presentation of findings
Page 5 and 6
Procession of findings
Page 7
Page 8
Reference list
Page 9

In this project I believe the outcome will be that light energy is essential for photosynthesis to occur. The aim was to show that light is necessary for photosynthesis. Photosynthesis is the process of converting light energy into chemical potential energy and storing it as starch. This process occurs in plants and some algae. Plants need light energy, CO2, and H2O to make sugar. The process of photosynthesis takes place in the chloroplasts, specifically using chlorophyll in green leaves. We have been told in class that the four factors necessary for photosynthesis are light, carbon dioxide, chlorophyll and temperature. The factor I decided to test was light because photosynthesis is often called a “light reaction” and I from this I knew light must be vitally essential for the process to take place. The main source of energy during photosynthesis is light.

Review of literature
Transcript of Grade 11 Biology - Photosynthesis
Photosynthesis is a chemical process in which a plant uses solar energy to create energy storing organic compounds from carbon dioxide (C02). The plant uses sunlight to convert carbon dioxide and water into glucose, which is a carbohydrate.
This all happens in the chloroplasts in the leaf cells using chlorophyll. The chlorophyll absorbs the solar energy and splits the water (H2O) molecules releasing the oxygen from the water molecule into the air. Then, in the stroma of the chloroplasts, the hydrogen atoms from the water molecules join with the carbon dioxide from the air to make glucose and water.
The chemical energy is stored in the plant cells at ATP.
To summarise photosynthesis as a mathematical equation:
Water + light energy + chlorophyll = hydrogen ions + oxygen + ATP
To summarise Light Dependent Reaction as a mathematical equation:
ATP + hydrogen ions + carbon dioxide = glucose + water + ADP

The availability of carbon dioxide, the light intensity and temperature all determine the rate at which photosynthesis takes place.

I believe this information is accurate and of a good quality. All the chemical equations are correct and I know this because we looked at them in class. The source is written by a grade 11 biology teacher and I don’t believe she missed out any vital information. I believe it is a very accurate description of photosynthesis and has allowed me to improve my understanding of photosynthesis which will help me throughout this project.

Light Absorption for Photosynthesis
Chlorophyll and other pigments found in the leaves of plants absorb light thereby starting the chemical process known as...

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