Visible light used in photosynthesis ranges from:__________?
Correct answer: C. 380 - 750 nm in wavelength
- A. 300 - 700 nm in wavelength
- B. 350 - 750 nm in wavelength
- C. 380 - 750 nm in wavelength
- D. 390 - 790 nm in wavelength.
Explanation
The photosynthetically useful part of visible light is commonly given as approximately 380 to 750 nm, covering the wavelengths absorbed by photosynthetic pigments. Students may choose 300 to 700 nm because it resembles a broad visible-light range, but 300 nm is ultraviolet and excludes part of the useful red region.
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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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