Developed strictly in accordance with the ICAR Sixth Deans' Committee syllabus for undergraduate biotechnology and life science practical courses, this manual transforms prescribed laboratory exercises into structured, step-by-step Standard Operating Procedures (SOPs) that emphasize both conceptual understanding and practical competency. It is designed to help students acquire essential laboratory skills while preparing effectively for practical examinations, viva-voce, and continuous assessments.

The manual systematically covers the core practical exercises prescribed under the curriculum, including preparation of growth media and buffers, plasmid DNA isolation, nucleic acid quality assessment, restriction enzyme digestion, agarose gel electrophoresis, preparation of competent cells, Escherichia coli transformation, screening of transformants, and confirmation of recombinant clones. Each experiment is presented in a clear, sequential format with objectives, principles, materials required, procedures, observations, calculations, precautions, and expected outcomes.

To strengthen laboratory competence, every practical includes reagent preparation tables, stock-to-working dilutions, pH requirements, critical operational parameters, and quality-control measures. The manual further integrates positive and negative controls, acceptance criteria for experimental results, and troubleshooting pathways for commonly encountered laboratory problems. Dedicated viva sections explain the scientific rationale behind each step, enabling students to connect theory with practice.

Special attention has been given to calculations and quantitative aspects frequently tested in examinations, including DNA quantification, restriction digestion setup, insert-to-vector molar ratio calculations, plating dilutions, and transformation efficiency. Flowcharts, checklists, and quick-reference tables ensure ease of learning and reproducibility of experimental procedures.

Key Features
• Strictly aligned with the ICAR Sixth Deans' Committee syllabus and learning outcomes
• Step-by-step SOPs for all prescribed practical exercises
• Reagent preparation tables, calculations, and quality-control guidelines
• Critical parameters including temperatures, incubation times, rpm, enzyme units, and concentrations
• Viva-voce boxes explaining principles and underlying molecular mechanisms
• Troubleshooting guides for common laboratory errors and experimental failures
• Observation tables, result interpretation, and acceptance criteria for each experiment
• Mini-numericals and calculation-based exercises frequently asked in practical examinations
• Useful for practical examinations, record preparation, viva-voce, and competitive examinations in biotechnology and life sciences

By integrating laboratory procedures with conceptual clarity and examination-oriented presentation, this manual serves as a comprehensive practical companion for students pursuing undergraduate programmes under the ICAR Sixth Deans' Committee framework, while simultaneously building the technical competence required for advanced studies and research in molecular biology and genetic engineering.

Archana Rani: Senior Research Fellow, Department of Plant Breeding & Genetics, College of Agriculture, Jawahar Lal Nehru Krishi Vishwavidyala, Jabalpur, Madhya Pradesh

Yogendra Singh: Senior Assistant Professor (Biotechnology),Department of Genetics and Plant Breeding, Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur-482004, Madhya Pradesh

1 Preparation of Growth, Madia

2 Preparation of Stock Solutions and Buffers

3 Plasmid DNA Isolation

4 Quality and Quantity Assessment of DNA

5 Restriction Digestion of DNA

6 Agarose Gel Electrophoresis

7 Preparation of Competent Cells

8 Preparation of Genetic Transformation of E. Coli

9 Screening of Recombinant DNA Clones in E. Coli.

10 Confirmation of Recombinant Clones