Cellular Respiration Comparator
Understand the differences between aerobic and anaerobic respiration, including ATP yield, reaction locations, and products.
About this simulation
- What
- An interactive Biology simulation of Cellular Respiration Comparator.
- Who
- Designed for AP, IB, and A‑Level Biology students.
- How
- Runs in any modern browser — drag, adjust, and explore in real time.
Updated 2025-10-05
Key Concepts
Glycolysis
The first stage for both pathways. Occurs in cytoplasm, breaks glucose into pyruvate, yielding 2 ATP.
Aerobic Respiration
Requires Oxygen. Occurs in mitochondria (Krebs + ETC). Produces ~30-32 ATP and CO₂/H₂O.
Anaerobic Respiration
No Oxygen required. Fermentation occurs in cytoplasm. Produces only 2 ATP and Lactic Acid or Ethanol/CO₂.
Understanding Cellular Respiration
Cellular Respiration is a set of metabolic reactions and processes that take place in the cells of organisms to convert biochemical energy from nutrients into adenosine triphosphate (ATP) while releasing waste products.
Aerobic respiration requires oxygen as a terminal electron acceptor and involves four distinct stages: Glycolysis, the Link Reaction, the Krebs Cycle, and the Electron Transport Chain (ETC). It provides a high ATP yield of approximately 30-32 units per glucose molecule.
Anaerobic respiration (including fermentation) occurs in the absence of oxygen. It exclusively takes place in the cytoplasm, yielding a significantly lower output of 2 ATP while producing metabolic byproducts like lactic acid or ethanol.