Paper I — 2024 December (Supplementary) (2019 Scheme) — Qxv

Paper I

2024 December (Supplementary) (2019 Scheme) · 100 marks · 180 min

Question

Tissue transplantation between identical twins is an example of

• a) Autograft
• b) Isograft
• c) Allograft
• d) Xenograft Question numbers (xvi) – (xx) consists of two Statements-Assertion (A) and reason (R). Answer these questions by selecting the appropriate options given below.

Qxv1 marksMCQs★✓

Answer

- [x] b) Isograft

A graft transplanted between genetically identical individuals (i.e., identical/monozygotic twins, who share an identical genome) is termed an isograft (syngeneic graft) — since donor and recipient are genetically identical, there is no antigenic disparity and no risk of graft rejection, unlike an allograft (between genetically different individuals of the same species, requiring immunosuppression to prevent rejection). An autograft is tissue transplanted from one site to another within the same individual (not between two people); a xenograft is a graft between different species.

Related Concepts

1. 1Transplant Immunology and Tumour Immunology

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