CSIR-NET LIFE SCIENCES

Unit 13: Advances in Biotechnology

Complete Topic-Wise Syllabus

Recombinant DNA Technology • Medical Biotechnology • Animal Biotechnology • Agriculture • Marine • Environmental Biotechnology

A. Recombinant DNA Technology

🧬 1. Molecular Cloning

Molecular cloning involves isolation, amplification and insertion of a DNA fragment into a suitable vector to generate recombinant DNA.

• Isolation of DNA
• Restriction digestion
• DNA ligation
• Vector construction
• Transformation
• Selection and screening
• Recombinant clone identification

🧪 2. Cloning Vectors

• Plasmids
• Bacteriophages
• Cosmids
• Artificial chromosomes
• Bacterial artificial chromosomes (BACs)
• Yeast artificial chromosomes (YACs)
• Expression vectors

📌 Basic Recombinant DNA Workflow

DNA Isolation → Restriction Digestion → Ligation → Transformation → Selection → Screening → Clone Confirmation

🧫 3. Expression of Recombinant Proteins

• Expression vectors
• Promoters
• Host organisms
• Transcription and translation
• Protein purification
• Soluble and insoluble expression

🦠 4. Expression Hosts

• Escherichia coli
• Yeast
• Insect cells
• Mammalian cells
• Plant expression systems

🧬 5. In Vitro Mutagenesis

• Site-directed mutagenesis
• Random mutagenesis
• Deletion mutagenesis
• Insertion mutagenesis
• Generation of mutant proteins

🎯 6. Gene Knockout

Gene knockout involves disruption or removal of a specific gene to study its biological function.

• Gene targeting
• Homologous recombination
• CRISPR-based knockout
• Knockout in bacteria
• Knockout in eukaryotic organisms

✂️ 7. Genome Editing Techniques

• CRISPR-Cas systems
• Zinc-finger nucleases (ZFNs)
• TALENs
• Targeted DNA cleavage
• Gene disruption
• Gene insertion
• Gene replacement

🎯 CSIR-NET Focus:

Understand the differences between ZFNs, TALENs and CRISPR-Cas systems, particularly target recognition, DNA cleavage and programmability.

🧬 8. Protein Sequencing

• Edman degradation
• Mass spectrometry
• Peptide mapping
• Proteolytic digestion
• Identification of amino-acid sequences

🧬 9. DNA Sequencing

• Sanger sequencing
• Maxam-Gilbert sequencing
• Next-generation sequencing
• Illumina sequencing
• Long-read sequencing
• Sequence assembly

🧬 10. Genome Sequencing Strategies

• Whole-genome sequencing
• Whole-genome shotgun sequencing
• Hierarchical sequencing
• Genome assembly
• Genome annotation

📊 11. Gene Expression Analysis

• RT-PCR
• qPCR
• Microarray analysis
• RNA sequencing
• RNA-seq
• Transcriptome analysis

Technique	Major Application
PCR	DNA amplification
RT-PCR	RNA → cDNA followed by amplification
qPCR	Quantitative measurement of nucleic acids
Sanger Sequencing	High-accuracy sequencing of individual DNA fragments
RNA-seq	Genome-wide transcriptome analysis

B. Medical Biotechnology

🛡️ 1. Immunological Applications

• Autoimmunity
• Transplantation
• Tumor immunology
• Stem cell therapy
• Cell-based vaccines
• Immunotherapy

💉 2. Types of Vaccines

• Live vaccines
• Killed/inactivated vaccines
• Attenuated vaccines
• Subunit vaccines
• Recombinant vaccines
• Nucleic-acid vaccines

💉 Vaccine Concept

Vaccine Type	Basic Principle
Live	Uses viable organism or biological agent
Attenuated	Uses weakened organism
Inactivated	Uses killed/inactivated organism
Subunit	Uses selected antigenic components
Recombinant	Uses antigen produced through recombinant technology
Nucleic Acid	Uses DNA or RNA encoding antigenic information

🧪 3. Diagnostics

• ELISA
• Western blotting
• PCR-based diagnostics
• qPCR
• Antigen detection
• Antibody detection
• Molecular diagnostics
• Point-of-care diagnostics

🧬 4. Vaccine Adjuvants

Adjuvants enhance and modulate immune responses to vaccine antigens.

• Enhancement of antigen presentation
• Activation of innate immune responses
• Improved magnitude and duration of immune response

🧫 5. Cell Therapy

• Replacement of damaged cells
• Immune-cell based therapies
• Regenerative medicine
• Engineered cell therapies

🌱 6. Stem Cell Therapy

• Embryonic stem cells
• Adult stem cells
• Mesenchymal stem cells
• Hematopoietic stem cells
• Induced pluripotent stem cells

🔬 7. Stem Cell Technology

• Induced pluripotent stem cells (iPSCs)
• Reprogramming of differentiated cells
• Directed differentiation
• Lineage specification
• Regenerative medicine

🧬 iPSC Concept:

Differentiated Somatic Cell → Cellular Reprogramming → Induced Pluripotent Stem Cell → Directed Differentiation → Specialized Cell Type

💊 8. Application of Stem Cells

• Drug screening
• Disease modelling
• Developmental biology
• Regenerative medicine
• Personalized medicine

🧫 9. Organoids

Organoids are self-organizing three-dimensional cellular models derived from stem cells or tissue-derived cells that reproduce selected structural and functional characteristics of organs.

• Stem-cell based 3D models
• Disease modelling
• Developmental biology
• Drug screening
• Toxicity testing
• Personalized medicine

🧬 10. Immunotherapy

• Monoclonal antibody therapy
• Immune checkpoint-based approaches
• Cell-based immunotherapy
• Engineered immune cells
• Cancer immunotherapy

🧬 11. Recombinant DNA-Based Therapy

• Gene replacement
• Gene addition
• Gene editing
• Therapeutic protein production
• Genetic disease treatment strategies

🧪 12. Antibody Engineering

• Chimeric antibodies
• Humanized antibodies
• Fully human antibodies
• Antibody fragments
• Bispecific antibodies

🦠 13. Phage Display Libraries

Phage display is a technique in which peptides or proteins are displayed on bacteriophage particles for selection of molecules with desired binding properties.

• Library construction
• Antibody selection
• Affinity screening
• Protein-protein interaction studies

🧱 14. Tissue Engineering

• Cells
• Scaffolds
• Growth factors
• Tissue regeneration
• Biomaterials

🧠 15. Neurobiology

• Electrophysiological studies
• Neuronal activity
• Brain function
• Neural circuits
• Behavioural analysis

⚡ 16. Electrophysiological Studies

• Membrane potential
• Action potentials
• Synaptic activity
• Neural recording
• Electrical activity of brain cells

🐁 17. Behavioural Tests

• Learning and memory assays
• Locomotor activity
• Anxiety-related behavioural tests
• Social behaviour studies
• Sensory and motor analysis

🩺 18. Medical Devices and Implants

• Biocompatible materials
• Implantable devices
• Drug-delivery devices
• Artificial tissues
• Prosthetic systems

📡 19. Biosensors

A biosensor combines a biological recognition element with a transducer to detect a specific biological or chemical analyte.

Analyte → Biological Recognition Element → Transducer → Signal Processing → Measurable Output

• Enzyme biosensors
• Antibody-based biosensors
• DNA biosensors
• Cell-based biosensors
• Electrochemical biosensors
• Optical biosensors

C. Animal Biotechnology

🐄 1. Transgenic Animals

Transgenic animals contain introduced genetic material that is stably maintained and expressed in the animal genome.

• Gene transfer
• Transgene expression
• Animal models of human disease
• Production of recombinant proteins
• Studies of gene function

🧬 2. Animal Breeding

• Selective breeding
• Genetic improvement
• Marker-assisted breeding
• Reproductive technologies
• Management of genetic diversity

🧊 3. Conservation of Germplasm

• Sperm cryopreservation
• Oocyte preservation
• Embryo preservation
• Cell banking
• Genetic resource conservation

🧬 4. Genetic Health Monitoring

• Detection of inherited disorders
• Genetic screening
• Genotyping
• Monitoring laboratory animal colonies

🩺 5. Molecular Medicine and Surgery

• Molecular diagnosis
• Genetic disease detection
• Precision medicine
• Molecular biomarkers
• Advanced surgical technologies

🦠 6. Molecular Diagnosis of Pathogens

• PCR
• RT-PCR
• qPCR
• Nucleic acid amplification
• Sequencing-based detection

🧫 7. Cell Cloning and Selection

• Cell isolation
• Clonal expansion
• Selection of desired cell populations
• Cell line development

🧪 8. Animal Cell and Tissue Culture

• Primary cell culture
• Continuous cell lines
• Culture media
• Cell proliferation
• Cell differentiation
• Tissue culture applications

🐄 Major Applications:

• Vaccine production
• Recombinant protein production
• Drug testing
• Disease modelling
• Transgenic animal production
• Conservation of genetic resources

D. Agriculture Biotechnology

🌱 1. Transgenic Plants

Transgenic plants are genetically modified plants containing introduced genetic material that provides a desired trait.

• Insect resistance
• Herbicide tolerance
• Disease resistance
• Abiotic stress tolerance
• Improved nutritional quality

🧬 2. Molecular Diagnosis and Strain Identification

• PCR-based identification
• DNA barcoding
• Marker-based identification
• Pathogen detection
• Genetic fingerprinting

🌾 3. Genomics in Agriculture

• Genome sequencing
• Comparative genomics
• Functional genomics
• Crop improvement
• Trait discovery
• Genetic diversity analysis

🧬 4. Expressed Sequence Tags (ESTs)

ESTs are short DNA sequences generated from expressed transcripts and can be used for gene discovery and expression analysis.

• Gene identification
• Transcript discovery
• Marker development
• Functional genomics

🔬 5. Molecular Markers

• RFLP
• RAPD
• ISSR
• SSR
• AFLP
• SNP markers

Marker	Important Feature
RFLP	Restriction fragment-based marker
RAPD	PCR-based dominant marker
SSR	Highly polymorphic microsatellite marker
SNP	Single nucleotide variation
AFLP	Restriction digestion + selective amplification

🌾 6. Marker-Assisted Breeding

• Marker-assisted selection
• Trait-linked marker identification
• Selection of desirable genotypes
• Accelerated crop improvement

🎯 7. Foreground Selection

Foreground selection identifies individuals carrying the desired target gene or genomic region.

🌳 8. Background Selection

Background selection selects individuals with maximum recovery of the desired recurrent parental genome.

🔗 9. Gene Introgression

Gene introgression involves transfer of a desired gene or genomic region from one genetic background into another through breeding.

🧬 10. Gene Pyramiding

Gene pyramiding combines multiple desirable genes or resistance genes into a single genotype.

🌱 Marker-Assisted Breeding Concept

Donor Parent → Cross → F₁ → Backcrossing → Foreground Selection → Background Selection → Gene Pyramiding → Improved Variety

🔬 11. Non-Gel Based Plant Genotyping

• High-resolution melting analysis
• Allele-specific PCR
• SNP-based assays
• DNA sequencing-based genotyping
• Real-time PCR-based genotyping

🌍 12. GE Crops and Biodiversity

• Gene flow
• Effects on non-target organisms
• Changes in agricultural biodiversity
• Evolution of resistance
• Ecological interactions
• Risk assessment

🌱 13. Plant Tissue and Cell Culture

• Callus culture
• Cell suspension culture
• Organ culture
• Micropropagation
• Somatic embryogenesis
• Organogenesis
• Haploid production
• Plant regeneration

🌿 14. Plantibodies

Plantibodies are antibodies produced in genetically engineered plants.

• Recombinant antibody production
• Molecular farming
• Therapeutic applications
• Diagnostic applications

E. Marine Biotechnology

🌊 1. Important Marine Organisms

• Marine bacteria
• Marine archaea
• Microalgae
• Macroalgae
• Marine fungi
• Sponges
• Corals
• Molluscs
• Crustaceans
• Marine fish

🐠 2. Marine Organism Biology and Behaviour

• Marine adaptation
• Feeding behaviour
• Reproductive strategies
• Migration
• Environmental adaptation

📊 3. Marine Resource Assessment

• Population estimation
• Species diversity
• Fishery resources
• Marine biomass
• Sustainable resource utilization

🌊 4. Marine Population Studies

• Population size
• Population structure
• Recruitment
• Mortality
• Distribution
• Migration

🛡️ 5. Marine Environment Protection

• Marine pollution control
• Habitat conservation
• Marine biodiversity protection
• Coastal ecosystem management
• Sustainable fisheries

🦠 6. Microbes in Marine Environments

• Marine bacteria
• Marine archaea
• Marine fungi
• Microalgae
• Marine microbial communities

🧪 7. Microbial Metabolites

• Antibiotics
• Enzymes
• Bioactive compounds
• Anticancer compounds
• Antiviral compounds
• Industrial metabolites

🦐 8. Seafood Microbiology

• Foodborne pathogens
• Spoilage microorganisms
• Food preservation
• Seafood safety
• Microbial quality assessment

💊 9. Marine Pharmacology

Marine organisms are important sources of biologically active molecules with pharmaceutical potential.

• Anticancer compounds
• Antimicrobial compounds
• Anti-inflammatory compounds
• Antiviral compounds
• Marine natural products

🦠 10. Biofilms

Biofilms are structured microbial communities attached to surfaces and embedded within an extracellular matrix.

• Biofilm formation
• Microbial attachment
• Extracellular polymeric substances
• Biofilm-associated resistance
• Marine biofilms

⚓ 11. Fouling and Corrosion

• Marine biofouling
• Microbial attachment
• Microbiologically influenced corrosion
• Biofilm-associated corrosion
• Antifouling technologies

🌍 12. Oceanography

• Physical oceanography
• Chemical oceanography
• Biological oceanography
• Marine ecosystems
• Ocean circulation
• Marine environmental monitoring

🌊 Marine Biotechnology Applications

Marine Organisms → Biodiversity Exploration → Bioactive Compound Discovery → Biotechnology → Pharmaceuticals / Food / Enzymes / Biomaterials

F. Environmental Biotechnology

💧 1. Wastewater Treatment

• Primary treatment
• Secondary treatment
• Tertiary treatment
• Biological wastewater treatment
• Activated sludge process
• Trickling filters
• Anaerobic digestion

💧 Basic Wastewater Treatment

Wastewater → Screening → Primary Treatment → Biological Treatment → Secondary Clarification → Tertiary Treatment → Discharge / Reuse

🦠 2. Biological Wastewater Treatment

• Microbial degradation of organic matter
• Biological oxygen demand reduction
• Nitrogen removal
• Phosphorus removal
• Sludge production

🏭 3. Pollution Control

• Air pollution control
• Water pollution control
• Soil pollution control
• Biological treatment technologies
• Waste minimization

🌱 4. Biosurfactants

Biosurfactants are surface-active compounds produced by microorganisms or biological systems.

• Biodegradable
• Lower toxicity potential
• Emulsification
• Oil recovery
• Bioremediation

🌾 5. Biofertilizers

• Microbial inoculants
• Nitrogen-fixing microorganisms
• Phosphate-solubilizing microorganisms
• Plant growth-promoting microorganisms
• Improved nutrient availability

🐛 6. Biopesticides

• Microbial pesticides
• Biological control agents
• Insecticidal microorganisms
• Fungal biocontrol agents
• Viral biocontrol agents

🛢️ 7. Microbially Enhanced Oil Recovery

Microorganisms can enhance oil recovery by producing metabolites that alter reservoir conditions and improve oil displacement.

• Biosurfactant production
• Gas production
• Acid production
• Reduction of oil viscosity
• Improved oil displacement

♻️ 8. Integrated Waste Management

• Waste reduction
• Reuse
• Recycling
• Biological treatment
• Resource recovery
• Energy recovery

🔥 9. Biogas from Waste

Biogas is produced through anaerobic digestion of biodegradable organic matter.

Organic Waste → Hydrolysis → Acidogenesis → Acetogenesis → Methanogenesis → Biogas

• Methane
• Carbon dioxide
• Small amounts of other gases

⛽ 10. Biofuel from Waste

• Biogas
• Bioethanol
• Biodiesel
• Biomethane
• Microbial conversion of waste biomass

🌍 11. Bioremediation

Bioremediation uses microorganisms or biological processes to transform or remove pollutants from contaminated environments.

• Microbial degradation
• Organic pollutant removal
• Heavy-metal immobilization or transformation
• Petroleum hydrocarbon degradation
• Industrial pollutant treatment

🌿 12. Phytoremediation

Phytoremediation uses plants to remove, stabilize, degrade or transform contaminants in soil and water.

• Phytoextraction
• Phytostabilization
• Rhizofiltration
• Phytodegradation
• Phytovolatilization

🌱 Bioremediation vs Phytoremediation

Feature	Bioremediation	Phytoremediation
Main Biological Agent	Microorganisms	Plants
Major Environment	Soil, water, wastewater and other environments	Soil, sediment and water
Main Principle	Microbial transformation/degradation	Plant uptake, stabilization or transformation

♻️ 13. Environmental Biotechnology Applications

• Wastewater treatment
• Solid waste management
• Bioremediation
• Phytoremediation
• Biofuel production
• Biogas production
• Biosurfactants
• Biofertilizers
• Biopesticides
• Resource recovery

📚 Unit 13 – Quick Revision Map

A → Recombinant DNA Technology

B → Medical Biotechnology

C → Animal Biotechnology

D → Agriculture Biotechnology

E → Marine Biotechnology

F → Environmental Biotechnology

🎯 High-Yield CSIR-NET Topics

• Molecular cloning and recombinant DNA technology
• Cloning vectors and expression systems
• Recombinant protein expression
• In vitro mutagenesis
• Gene knockout
• CRISPR-Cas genome editing
• ZFN and TALEN
• Sanger sequencing
• Next-generation sequencing
• Genome sequencing strategies
• RNA-seq and gene expression analysis
• Vaccines and vaccine types
• Adjuvants
• Immunotherapy
• Stem cells and iPSCs
• Directed differentiation
• Organoids
• Antibody engineering
• Phage display
• Tissue engineering
• Biosensors
• Transgenic animals
• Animal cell culture
• Germplasm conservation
• Molecular diagnosis of pathogens
• Transgenic plants
• Plant genomics
• ESTs
• Molecular markers
• Marker-assisted selection
• Foreground and background selection
• Gene introgression
• Gene pyramiding
• Plant tissue culture
• Plantibodies
• Marine microbial biotechnology
• Marine natural products
• Seafood microbiology
• Biofilms
• Marine fouling and corrosion
• Wastewater treatment
• Biosurfactants
• Biofertilizers
• Biopesticides
• Microbially enhanced oil recovery
• Integrated waste management
• Biogas production
• Biofuel from waste
• Bioremediation
• Phytoremediation

🧠 Important Concept Comparisons

Concept	Key Difference
Gene Knockout	Disruption or loss of gene function
Gene Editing	Targeted modification of genomic DNA
iPSC	Somatic cells reprogrammed to pluripotent state
Organoid	Self-organizing 3D model derived from cells
Foreground Selection	Selects individuals carrying desired target gene/region
Background Selection	Maximizes recovery of recurrent parent genome
Gene Introgression	Transfers desired gene/region into another genetic background
Gene Pyramiding	Combines multiple desirable genes in one genotype
Bioremediation	Uses biological systems, commonly microorganisms, for pollutant transformation/removal
Phytoremediation	Uses plants for contaminant removal, stabilization or transformation

🧬 Modern Biotechnology Pipeline

Gene / Genome → Molecular Analysis → Genetic Engineering → Cell / Organism Engineering → Product / Trait Development → Scale-Up → Application

🎯 One-Line Unit 13 Revision:

Advances in Biotechnology integrate recombinant DNA technology, genome editing, molecular diagnostics, stem-cell technology, transgenic organisms, agricultural genomics, marine resources and environmental biotechnology for improving health, agriculture, industry and environmental sustainability.

🧬 CSIR-NET Life Sciences – Unit 13

Advances in Biotechnology

Understand → Connect → Apply → Practice → Revise