Which of the following does not cast shadow in plain X-rays?

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Which of the following does not cast shadow in plain X-rays? Answer: Urate crystals

Urate deposits are generally radiolucent on ordinary plain radiographs and therefore do not produce the prominent radiopaque shadow associated with bone, metal, or calcification. This property is clinically relevant when evaluating conditions such as uric acid stones or gout.

Question context

This question is part of 🧬 Biochemistry within the broader 🧬 Medical Science subject and appears in the SPSC – Sindh Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.