The GATE Grind

GATE Biomaterials and Tissue Engineering: Biocompatibility and Implant Characteristics – Previous Year Questions

11 GATE previous year questions on Biocompatibility and Implant Characteristics (Biomaterials and Tissue Engineering, Biomedical Engineering) with answers and explanations, from every paper.

  1. GATE 2020 BM Q14 (1 mark, Multiple choice) – Shape-memory biomaterials are NOT used in which listed application?
  2. GATE 2020 BM Q48 (2 marks, Multiple choice) – A degradable surgical suture loses 40% of its original tensile strength after 10 days and 50% after 20 days. Assuming exponential decay, what closest…
  3. GATE 2021 BM Q30 (1 mark, Multiple select) – Which mechanisms may cause bone-implant failure?
  4. GATE 2022 BM Q27 (1 mark, Multiple select) – Which properties should an ideal coronary stent have?
  5. GATE 2023 BM Q52 (2 marks, Multiple select) – By which mechanisms can a water-insoluble polymeric biomaterial become water-soluble in vivo?
  6. GATE 2023 BM Q59 (2 marks, Numerical answer) – In a 24-hour cell-viability assay with 10000 cells and absorbance measured at 570 nm, control absorbance is 0.8, treated absorbance 0.5 and blank…
  7. GATE 2024 BM Q20 (1 mark, Multiple choice) – Which cumulative drug-release curve is ideal for an implantable slow-release delivery device?
  8. GATE 2024 BM Q41 (2 marks, Multiple choice) – Over six months, the orthopaedic implant’s normalized molecular weight falls first, mechanical strength falls next, and mass remains initially near…
  9. GATE 2025 BM Q61 (2 marks, Numerical answer) – Suture strength obeys σ=σ0−2 ln(t) for t≥1 week. If strength is 2 MPa at week 4, find strength at week 8 in MPa to two decimal places.
  10. GATE 2026 BM Q36 (2 marks, Multiple choice) – A drug is loaded into a polymeric device. Which ratio defines encapsulation efficiency?
  11. GATE 2026 BM Q37 (2 marks, Multiple choice) – Which complement pathway is most likely activated on implanted biomaterials in a healthy human?