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31 Οκτ 2023 · The electron transport chain, where the majority of ATP is formed, requires a large input of oxygen. However, many organisms have developed strategies to carry out metabolism without oxygen, or can switch from aerobic to anaerobic cell respiration when oxygen is scarce.
- 7.5: Metabolism without Oxygen
If aerobic respiration occurs, then ATP will be produced...
- 7.5: Metabolism without Oxygen
19 Ιουλ 2024 · ATP can also be produced without oxygen (i.e., anaerobic), which is something plants, algae, and some bacteria do by converting the energy held in sunlight into energy that can be used by a cell via photosynthesis.
8 Απρ 2024 · Anaerobic respiration is the process of ATP synthesis without adequate oxygen delivery to tissues. Sometimes the body cannot supply the muscles with the oxygen it needs to create energy, for example during intense exercise.
23 Οκτ 2020 · This is why air-breathing organisms die so quickly without a constant supply of oxygen: our cells cannot generate enough energy to stay alive without it. Instead of oxygen, anaerobic cells use substances such as sulfate, nitrate, sulfur, and fumarate to drive their cellular respiration.
Overview of oxidative phosphorylation. The electron transport chain forms a proton gradient across the inner mitochondrial membrane, which drives the synthesis of ATP via chemiosmosis.
The ATP generated in this process is made by substrate-level phosphorylation, which does not require oxygen. Fermentation is less efficient at using the energy from glucose: only 2 ATP are produced per glucose, compared to the 38 ATP per glucose nominally produced by aerobic respiration.
If aerobic respiration occurs, then ATP will be produced using the energy of high-energy electrons carried by NADH or FADH 2 to the electron transport chain. If aerobic respiration does not occur, NADH must be reoxidized to NAD + for reuse as an electron carrier for the glycolytic pathway to continue.
