Methotrexate is toxic to human cells because it inhibits

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Methotrexate is toxic to human cells because it inhibits Answer: Reduction of H2 folate to H4 folate

Question context

This question is part of 🧫 Biotechnology within the broader 🧬 Medical Science subject and appears in the DemoPaper-Pakistan preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.