Photosynthesis is process in which ________ compounds of carbon (CO2) and hydrogen (H2O) are reduced to carbohydrate like (glucose) using light energy.
Correct answer: C. Energy poor
- A. Organic
- B. Energy rich
- C. Energy poor
- D. Reduced
Explanation
Carbon dioxide and water are inorganic and energy-poor compounds; photosynthesis uses light energy to reduce them into the energy-rich organic carbohydrate glucose. Students may choose organic compounds because glucose is organic, but the question refers to the starting compounds, CO2 and H2O.
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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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