Light is essential for photosynthesis. Justify this statement with the help of an experiment.
Answers
ANSWER
Light is one of the requirements for photosynthesis. When a part of the leaf is covered from both upper and lower sides with a black paper strip, light will not reach to covered part. ... Presence of starch in the leaf, which can be detected by performing iodine test, indicates occurrence of photosynthesis.
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Answer:
Light is essential for photosynthesis.
Explanation:
The most important factor for photosynthesis is light. The rate of photosynthesis depends on the quantity and quality of light. The chlorophyll molecule in green leaves absorb light, get excited and emit electrons. The emitted electrons are used in the production of adenosine triphosphate (ATP).
The photosynthesis is the most inside the presence of purple and blue lighting fixtures, while in inexperienced mild the charge is minimum due to the fact inexperienced mild is meditated by using the chlorophyll molecules.
Procedure:
1. Take the potted plant and hold it in a dark region for two-3 days so that the leaves get destarched.
2. cover part of considered one of its leaves with the strip of black paper. make sure that you cowl each the perimeters of the leaf.
3. Now place this plant in sunlight for three—four hours.
4. Pluck the selected included leaf and put off the black paper overlaying it.
5. region this leaf in the beaker containing water and boil it for about 10 minutes.
6. Take out the leaf and now boil it in alcohol, using the water bathtub, for 10 mins. This gets rid of the chlorophyll.
7. Take out the leaf and wash it underneath walking water.
8. vicinity this leaf inside the Petri dish and placed a few drops of iodine solution on it. Now look at the exchange in color.
Observations:
The leaf turns blue-black except in the covered region. As this covered region did not receive light, photosynthesis did not occur. Hence no starch was formed there. The uncovered region received light and starch was formed there due to photosynthesis.
Result:
Light is essential for photosynthesis.
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