Genetic Engineering — Prelims Strategy

Prelims Strategy

For Prelims, the strategy for genetic engineering should focus on factual accuracy and conceptual clarity. Aspirants must prioritize understanding the core techniques: recombinant DNA technology (restriction enzymes, ligase, vectors) and especially CRISPR-Cas9 (guide RNA, Cas9, PAM, NHEJ/HDR).

Memorize the specific roles of key regulatory bodies in India, particularly GEAC, RCGM, and IBSCs, and their respective ministries (MoEFCC for GEAC). Be aware of landmark applications like Bt Cotton, Golden Rice, and recent breakthroughs such as India's indigenous CAR-T therapy (NexCAR19).

Distinguish clearly between somatic and germline gene therapy. Pay attention to the 'Biosafety Guidelines 2022' and their implications for gene-edited crops (SDN-1, SDN-2 exemptions). Questions often test the 'what' and 'where' – what is the technology, what are its applications, and which body regulates it.

Practice MCQs that test conceptual understanding, identify correct/incorrect statements about mechanisms, and differentiate between similar terms (e.g., genetic engineering vs. traditional breeding). Focus on keywords and their precise definitions to avoid trap options.