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Extracellular enzymes
Extracellular enzymes work outside cells to break down large molecules into smaller, absorbable units.
Glycolysis
Glycolysis is the first step in cellular respiration, where glucose is broken down into pyruvate, releasing energy in the form of ATP.
Intracellular enzymes
Intracellular enzymes operate within cells, driving critical metabolic pathways such as glycolysis and the Krebs cycle.
The Krebs cycle
The Krebs cycle (also known as the citric acid cycle) occurs in the mitochondrial matrix and is a key part of aerobic respiration.