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Who amongst the following, first observed photosynthesis in plants?
Who amongst the following, first observed photosynthesis in plants?
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Solution
The correct option is A Melvin Calvin
Melvin Calvin first observed photosynthesis in plants. Calvin is remembered above all for his work in photo-synthesis, research that won him the Nobel Prize in Chemistry in 1961.
In 1946 Calvin began his Nobel prize-winning work on photosynthesis. After adding carbon dioxide with trace amounts of radioactive carbon-14 to an illuminated suspension of the single-cell green alga Chlorella pyrenoidosa, he stopped the alga’s growth at different stages and used paper chromatography to isolate and identify the minute quantities of radioactive compounds. This enabled him to identify most of the chemical reactions in the intermediate steps of photosynthesis—the process in which carbon dioxide is converted into carbohydrates. He discovered the “Calvin cycle,” in which the “dark” photosynthetic reactions are impelled by compounds produced in the “light” reactions that occur on absorption of light by chlorophyll to yield oxygen. Also using isotopic tracer techniques, he followed the path of oxygen in photosynthesis. This was the first use of a carbon-14 tracer to explain a chemical pathway.
Melvin Calvin first observed photosynthesis in plants. Calvin is remembered above all for his work in photo-synthesis, research that won him the Nobel Prize in Chemistry in 1961.
In 1946 Calvin began his Nobel prize-winning work on photosynthesis. After adding carbon dioxide with trace amounts of radioactive carbon-14 to an illuminated suspension of the single-cell green alga Chlorella pyrenoidosa, he stopped the alga’s growth at different stages and used paper chromatography to isolate and identify the minute quantities of radioactive compounds. This enabled him to identify most of the chemical reactions in the intermediate steps of photosynthesis—the process in which carbon dioxide is converted into carbohydrates. He discovered the “Calvin cycle,” in which the “dark” photosynthetic reactions are impelled by compounds produced in the “light” reactions that occur on absorption of light by chlorophyll to yield oxygen. Also using isotopic tracer techniques, he followed the path of oxygen in photosynthesis. This was the first use of a carbon-14 tracer to explain a chemical pathway.
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