In the presence of insufficient oxygen for aerobic respiration, the body will perform anaerobic respiration, in which glucose, \( \mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6} \), is converted to lactic acid, \( \mathrm{C}_{3} \mathrm{H}_{6} \mathrm{O}_{3} \). Which of the following describes this reaction? Choose 1 answer: (A) \( \mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6} \rightarrow \mathrm{C}_{3} \mathrm{H}_{6} \mathrm{O}_{3}+3 \mathrm{CO}_{2} \) (B) \( 2 \mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6} \rightarrow 2 \mathrm{C}_{3} \mathrm{H}_{6} \mathrm{O}_{3}+6 \mathrm{CO}_{2} \) (C) \( 2 \mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6} \rightarrow 2 \mathrm{C}_{3} \mathrm{H}_{6} \mathrm{O}_{3}+2 \mathrm{H}_{2} \mathrm{O} \) (D) \( \mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6} \rightarrow 2 \mathrm{C}_{3} \mathrm{H}_{6} \mathrm{O}_{3} \)
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The Deep Dive
When oxygen is scarce, the body shifts gears from aerobic respiration to anaerobic respiration, where glucose is broken down into lactic acid and other less useful byproducts. This process is less efficient in terms of energy production but allows for continued activity in low-oxygen conditions. In this funky dance of energy transformation, each molecule of glucose produces two molecules of lactic acid. So, the correct choice reflects that transformation perfectly—essentially splitting the glucose to fuel the action! The right answer here is (D) \( \mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6} \rightarrow 2 \mathrm{C}_{3} \mathrm{H}_{6} \mathrm{O}_{3} \).
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