Warburg effect, wherein tumor cells preferentially use aerobic glycolysis even in the presence of oxygen, primarily confers a survival advantage by:

• A Providing biosynthetic intermediates (ribose-5-phosphate, NADPH) via pentose phosphate shunting for anabolic reactions ✓
• B Generating maximum ATP per glucose molecule to sustain rapid proliferation
• C Reducing intracellular reactive oxygen species by diverting electrons away from the ETC
• D Inhibiting apoptosis by maintaining mitochondrial membrane potential

Explanation

The Warburg effect (aerobic glycolysis) is not primarily about ATP yield; rather, it diverts carbon into biosynthetic pathways — nucleotide synthesis via the pentose phosphate pathway and lipid synthesis via acetyl-CoA precursors — needed for rapid cell proliferation. The reduced ROS is a secondary benefit but not the primary advantage. Aerobic glycolysis actually generates less ATP per glucose than OXPHOS.

Reference: Robbins & Cotran Pathologic Basis of Disease, 10th ed.

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Written and medically reviewed by the StethoPrep medical team.