NEB Class 12 Biology is divided into Botany (37.5 marks) and Zoology (37.5 marks). High scores require clear biological diagrams alongside concise scientific descriptions.
1. Genetics and Molecular Biology
The semi-conservative DNA replication mechanism (Meselson-Stahl experiment) and the Lac Operon model in gene regulation are recurring long questions. Always illustrate the structural genes ($z, y, a$) and promoter/operator regions.
2. Plant Physiology
C3 vs C4 photosynthetic cycles, transpiration pull theory (Dixon & Joly), and Krebs cycle ATP accounting charts are tested continuously on board exams.
