First Actions spectrum was obtained by using__________?
Correct answer: D. Spirogyra
- A. Algae
- B. Fungi
- C. Bacteria
- D. Spirogyra
Explanation
T.W. Engelmann obtained the first action spectrum using the filamentous green alga Spirogyra and aerobic bacteria that gathered near regions releasing the most oxygen. Students may choose algae because Spirogyra is an alga, but the question asks for the specific organism used, which was Spirogyra.
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About Cellular Respiration
Cellular respiration releases energy from glucose through glycolysis, the link reaction, the Krebs cycle and the electron transport chain, producing ATP. The pathway differs in oxygen availability: aerobic respiration uses oxygen and yields more ATP, while anaerobic respiration produces much less ATP and forms lactic acid in muscles or ethanol and carbon dioxide in yeast.
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