Multiple choice

The oxidative break down of respiratory substrate with the help of oxygen is called

  1. aerobic respiration

  2. anaerobic respiration

  3. fermentation

  4. respiratory quotient

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A Correct answer
Explanation

Aerobic respiration is the oxidative breakdown of respiratory substrates (like glucose) with the help of oxygen, producing CO2, water, and ATP. Anaerobic respiration occurs without oxygen, fermentation is a type of anaerobic respiration in yeast/bacteria, and respiratory quotient is the ratio of CO2 produced to O2 consumed.