Question

4. Simple organisms, like yeast and bacteria, can survive in dead zones. Larger, complex organisms like

fish require oxygen to survive. Why is this? Use the following words in your answer
a. ATP/energy
b. aerobic
c. Anaerobic

Answer 1

anaerobic organisms do not require the presence of oxygen to produce energy in form of ATP, while aerobic organisms require oxygen

Explanation:

Anaerobic organisms produce energy by glycolysis, which is a metabolic pathway that produces ATP by transforming glucose to lactate when oxygen (O2) is limited. Glycolysis produces two (2) molecules of ATP per glucose molecule. Moreover, when O2 is available, aerobic organisms produce ATP by cellular respiration, which includes glycolysis, the Krebs cycle, and oxidative phosphorylation. Cellular respiration is able to produce thirty-eight (38) molecules of ATP per glucose molecule, thereby being more efficient than glycolysis.