The Warburg effect in cancer cells describes aerobic glycolysis. The PRIMARY advantage this metabolic reprogramming provides to rapidly proliferating cancer cells (beyond ATP) is:

• A Avoidance of reactive oxygen species generation from oxidative phosphorylation
• B Provision of carbon skeletons and reducing equivalents (NADPH via pentose phosphate) for biosynthesis of nucleotides, amino acids and lipids ✓
• C Higher ATP yield per glucose molecule compared to oxidative phosphorylation
• D Suppression of p53-mediated apoptosis through lactate dehydrogenase activity

Explanation

While glycolysis is less ATP-efficient than OXPHOS, the Warburg effect channels glucose-derived carbon into biosynthetic precursors: G6P feeds the pentose phosphate pathway generating NADPH (for reductive biosynthesis and antioxidant defense) and ribose-5-phosphate (for nucleotide synthesis); pyruvate and intermediates support lipid and amino acid synthesis. Cancer cells prioritize anabolism over energetic efficiency. ATP generation per glucose is actually lower via glycolysis (2 ATP vs ~30 ATP), making option C incorrect.

Reference: Harper's Illustrated Biochemistry, 32nd ed.

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