science hard MCQ

Liquid biopsy for cancer detection primarily analyzes which component in blood?

  1. Red blood cells
  2. Circulating tumor DNA (ctDNA)
  3. Platelets
  4. White blood cells

Answer: Circulating tumor DNA (ctDNA)

ctDNA fragments released by tumors into bloodstream carry tumor-specific mutations. Liquid biopsy enables non-invasive cancer detection, monitoring treatment response, and identifying resistance mechanisms. Emerging tool in precision oncology. [[ICMR Reports, NCERT Biology Class 12]]

Topic Biology - Liquid Biopsy
Exam Relevance UPSC CSE, SSC Scientific Assistant, CSIR NET
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