Biotechnology is one of the most important application-based topics in Biology. It connects molecular biology, genetics, microbiology, medicine and agriculture.

For NEET, this chapter is especially important because questions are often based on definitions, processes, examples, molecular tools and application-based concepts.

This chapter covers:

Principles and processes of biotechnology
Genetic engineering
Recombinant DNA technology
Production of human insulin
Vaccine production
Gene therapy
Genetically modified organisms
Bt crops
Transgenic animals
Biosafety
Biopiracy
Patents

Biotechnology and Its Applications | NEET Biology Notes

1. WHAT IS BIOTECHNOLOGY?

Biotechnology is the use of living organisms, cells, enzymes or biological processes to develop useful products and technologies.

Modern biotechnology mainly involves two important principles:

1. Genetic Engineering

Genetic engineering involves the direct manipulation of an organism's genetic material to introduce, remove or modify particular genes.

2. Bioprocess Engineering

Bioprocess engineering involves maintaining suitable and controlled conditions for the growth of microorganisms or cells so that useful biological products can be produced on a large scale.

Examples of biotechnology include:

Production of human insulin
Production of recombinant vaccines
Gene therapy
Bt crops
Genetically modified organisms
Production of therapeutic proteins
Development of transgenic animals

NEET Focus

Modern biotechnology is strongly associated with:

Genetic engineering + Bioprocess engineering

2. GENETIC ENGINEERING

Genetic engineering is the deliberate modification of genetic material using laboratory techniques.

Scientists can:

Isolate a particular gene
Cut DNA at specific locations
Join DNA fragments
Introduce foreign DNA into a host
Select transformed cells
Allow the desired gene to express

The central technology behind this process is:

Recombinant DNA Technology

3. RECOMBINANT DNA TECHNOLOGY

Recombinant DNA technology involves joining DNA molecules from different sources to produce a new DNA molecule.

The resulting DNA is called:

Recombinant DNA

For example:

Human gene + bacterial plasmid → Recombinant DNA

The recombinant DNA can be introduced into a suitable host cell, where the desired gene may be replicated and expressed.

4. BASIC STEPS OF RECOMBINANT DNA TECHNOLOGY

The major steps can be remembered as:

Isolation → Cutting → Joining → Introduction → Selection → Expression → Production

Let's understand each step.

Step 1: Isolation of DNA

DNA containing the desired gene is first isolated.

For example, if scientists want to produce a human protein, the gene responsible for that protein can be isolated from human genetic material.

The desired gene is often called the:

Gene of interest

5. RESTRICTION ENZYMES — THE MOLECULAR SCISSORS

The isolated DNA must be cut at specific locations.

This is done using:

Restriction Endonucleases

Restriction enzymes recognize specific nucleotide sequences in DNA and cut the DNA at or near these sites.

They are therefore often described as:

Molecular scissors

Recognition Sequence

Restriction enzymes recognize specific DNA sequences called:

Recognition sequences

Many restriction enzymes recognize palindromic DNA sequences.

A DNA sequence is palindromic when it reads in the same direction on the two complementary strands when considered according to their respective 5′→3′ orientations.

Example: EcoRI

A well-known restriction enzyme is:

EcoRI

It recognizes:

5′ — GAATTC — 3′

3′ — CTTAAG — 5′

EcoRI cuts DNA to produce sticky ends.

6. STICKY ENDS

Some restriction enzymes produce short single-stranded DNA overhangs called:

Sticky Ends

These ends can base-pair with complementary DNA sequences.

Sticky ends make it easier to join DNA fragments from different sources.

NEET Focus

Restriction enzyme → DNA cutting

Sticky ends → Complementary base pairing

7. DNA LIGASE — THE MOLECULAR GLUE

After the DNA has been cut, the desired DNA fragment must be joined with another DNA molecule, usually a vector.

This is done by:

DNA Ligase

DNA ligase joins DNA fragments by forming phosphodiester bonds between adjacent nucleotides.

Therefore:

Restriction enzyme = Molecular scissors
DNA ligase = Molecular glue

This is one of the most important NEET concepts in the chapter.

8. CLONING VECTOR

A cloning vector is a DNA molecule that carries foreign DNA into a suitable host cell.

Common vectors include:

Plasmids
Bacteriophages
Cosmids
Artificial chromosomes

One of the most commonly used vectors in genetic engineering is the:

Plasmid

A plasmid is generally a small, circular, extrachromosomal DNA molecule found in bacteria.

9. IMPORTANT FEATURES OF A CLONING VECTOR

A useful cloning vector generally contains:

Origin of Replication — ori

The origin of replication, or ori, is the region from which replication begins.

It allows the vector to replicate inside the host.

The ori can also influence the copy number of the vector.

Selectable Marker

A selectable marker helps identify cells that have successfully taken up the vector.

Examples include genes that provide resistance to certain antibiotics.

For example:

Ampicillin resistance
Tetracycline resistance

NEET Focus

ori → replication

Selectable marker → selection of transformed cells

Cloning Site

The vector contains suitable restriction sites where the foreign DNA can be inserted.

Insertion of foreign DNA into a vector produces:

Recombinant DNA

10. INTRODUCTION OF RECOMBINANT DNA INTO HOST CELLS

The recombinant DNA must be introduced into a suitable host cell.

In bacteria, the introduction of foreign DNA is commonly referred to as:

Transformation

Bacterial cells can be treated to make them capable of taking up DNA.

One classical method involves:

Calcium ion treatment → Heat shock → DNA uptake

Other methods include:

Electroporation
Microinjection
Gene gun
Agrobacterium-mediated transformation

11. SELECTION AND SCREENING

After transformation, not every cell necessarily contains the desired recombinant DNA.

Therefore, researchers need to identify suitable cells.

Selection

Selectable markers help identify cells that have received the vector.

Screening

Screening helps determine which cells contain the desired recombinant construct.

Therefore:

Selection → identifies suitable transformed cells

Screening → identifies the desired recombinant cells

12. GENE EXPRESSION

Once the desired gene is present in a suitable host, it may be expressed.

Gene expression can result in the production of the desired protein.

The basic concept is:

DNA → RNA → Protein

For example:

Human insulin gene → Gene expression → Insulin production

12A. PCR — AMPLIFICATION OF DNA

Sometimes only a very small amount of DNA is available for genetic engineering or molecular analysis. In such cases, the desired DNA fragment can be amplified using:

Polymerase Chain Reaction — PCR

PCR is a technique used to produce millions of copies of a specific DNA sequence in vitro.

The three major steps of PCR are:

1. Denaturation

The double-stranded DNA is heated so that the two DNA strands separate.

2. Annealing

The temperature is lowered, allowing short DNA primers to bind to their complementary sequences on the template DNA.

3. Extension

DNA polymerase extends the primers and synthesizes new DNA strands.

This cycle is repeated many times, resulting in exponential amplification of the target DNA.

Taq Polymerase

PCR uses a thermostable DNA polymerase called:

Taq polymerase

It was originally isolated from the thermophilic bacterium:

Thermus aquaticus

NEET Focus

PCR → DNA amplification
Taq polymerase → Thermus aquaticus
PCR sequence → Denaturation → Annealing → Extension

13. BIOREACTORS

For commercial production, genetically modified cells are grown on a large scale in specially designed vessels called:

Bioreactors

Bioreactors provide controlled conditions for biological production.

Important parameters include:

Temperature
pH
Oxygen supply
Nutrient availability
Agitation
Foam control

Large-scale production requires careful control of these conditions.

14. DOWNSTREAM PROCESSING

After the desired product has been produced, it must be:

Separated
Purified
Processed
Formulated
Tested for quality

This stage is called:

Downstream Processing

It is essential for obtaining a safe and high-quality biological product.

15. COMPLETE RECOMBINANT DNA TECHNOLOGY FLOW

Remember this sequence:

DNA isolation

↓

Restriction enzyme cutting

↓

Isolation of desired gene

↓

Insertion into vector

↓

DNA ligase

↓

Recombinant DNA

↓

Introduction into host

↓

Selection and screening

↓

Gene expression

↓

Bioreactor production

↓

Downstream processing

↓

Purified biological product

This sequence is extremely useful for NEET revision.

16. RECOMBINANT HUMAN INSULIN

One of the most important applications of recombinant DNA technology is the production of:

Human Insulin

Insulin is a peptide hormone produced by the β-cells of the pancreas.

Its major function is to help regulate blood glucose concentration.

17. WHY RECOMBINANT HUMAN INSULIN?

Historically, insulin used for treatment was obtained from the pancreas of animals such as:

Cattle
Pigs

Although animal insulin can be effective, it is not identical to human insulin and may cause immune reactions in some individuals.

Recombinant DNA technology made it possible to produce human insulin using genetically engineered biological systems.

18. STRUCTURE OF HUMAN INSULIN

Mature human insulin consists of two polypeptide chains:

A-chain

and

B-chain

These chains are connected by:

Disulfide bonds

Insulin is initially synthesized as a precursor molecule and undergoes processing to form mature insulin.

NEET Focus

Mature insulin = A-chain + B-chain

A-chain and B-chain → connected by disulfide bonds

19. PRODUCTION OF RECOMBINANT HUMAN INSULIN

A historically important example involves the use of genetically engineered:

Escherichia coli

DNA sequences corresponding to the insulin chains can be expressed in bacterial systems.

The insulin components are then recovered and assembled to obtain functional insulin.

The simplified pathway is:

Insulin gene

↓

Recombinant DNA

↓

E. coli

↓

Expression

↓

Insulin chains

↓

Assembly and processing

↓

Human insulin

20. BIOTECHNOLOGY AND VACCINE PRODUCTION

Biotechnology has greatly improved vaccine development.

Traditional vaccines may use:

Inactivated microorganisms
Attenuated microorganisms
Specific components of pathogens

Modern biotechnology can produce specific antigenic proteins using recombinant DNA technology.

21. RECOMBINANT VACCINES

In recombinant vaccine production, a gene encoding an antigen can be introduced into a suitable host.

The host produces the desired antigen.

The antigen can then be purified and used in vaccine production.

Important Example

Recombinant Hepatitis B vaccine

The vaccine is produced using recombinant DNA technology.

NEET Focus

A recombinant vaccine can be produced using a specific antigenic component rather than requiring the entire pathogen.

22. GENE THERAPY

Definition

Gene therapy is an approach in which genetic material is introduced, modified or regulated in a patient's cells to treat a disease associated with a genetic defect.

The basic idea is:

Defective gene/function

↓

Functional genetic material or appropriate genetic correction

↓

Improved cellular function

23. ADA DEFICIENCY AND GENE THERAPY

One of the classic examples of gene therapy is treatment of:

ADA Deficiency

ADA stands for:

Adenosine Deaminase

ADA deficiency can severely impair immune function.

A functional ADA gene can be introduced into the patient's cells.

24. BASIC ADA GENE THERAPY APPROACH

A simplified approach involves:

Removing lymphocytes from the patient
Culturing the cells outside the body
Introducing a functional ADA gene
Expanding the genetically modified cells
Returning the cells to the patient

The modified cells can then produce functional ADA.

25. LIMITATION OF ADA GENE THERAPY

A major limitation of the classical lymphocyte-based approach is that lymphocytes have a limited lifespan.

Therefore, the treatment may need to be repeated.

A more sustained approach can involve targeting bone marrow stem cells, because stem cells can generate long-lived cell populations.

NEET Focus

ADA deficiency → Classic example of gene therapy

26. GENETICALLY MODIFIED ORGANISMS

Genetically Modified Organism — GMO

is an organism whose genetic material has been deliberately altered using genetic engineering or related molecular techniques.

GMOs may be developed to obtain desirable characteristics such as:

Pest resistance
Disease resistance
Improved nutritional characteristics
Stress tolerance
Increased productivity
Production of useful biological products

27. GM CROPS

Genetic modification has been applied extensively in agriculture.

Possible objectives include:

Pest resistance

Plants can be modified to produce insecticidal proteins.

Disease resistance

Genes associated with resistance can be introduced or modified.

Improved nutritional quality

Genetic engineering can modify nutritional characteristics.

Stress tolerance

Research and crop development may target tolerance to:

Drought
Salinity
Temperature stress

28. Bt CROPS

One of the most important examples of genetically modified crops is:

Bt Cotton

Bt cotton contains genes obtained from:

Bacillus thuringiensis

This bacterium produces insecticidal proteins known as:

Cry Proteins

These proteins are toxic to susceptible insect larvae.

28A. SPECIFIC cry GENES IN BT CROPS

Different cry genes produce different Cry proteins with activity against particular insect pests.

Important NCERT-associated examples include:

cryIAc and cryIIAb

These genes are associated with resistance against:

Cotton bollworms

cryIAb

This gene is associated with resistance against:

Corn borer

NEET Memory

cryIAc + cryIIAb → Cotton bollworm

cryIAb → Corn borer

Do not assume that every Cry protein acts against every insect. The specificity depends on the particular Cry protein and the susceptible insect.

28B. RNA INTERFERENCE — RNAi

Another important application of biotechnology in agriculture is:

RNA Interference — RNAi

RNA interference is a mechanism of gene silencing in which specific RNA molecules prevent the expression of a particular gene.

A classic NCERT example involves protection of tobacco plants from a nematode:

Meloidogyne incognita

This nematode infects the roots of tobacco plants and causes significant damage.

How RNAi Works

Scientists introduced genes into the tobacco plant that produced both sense RNA and antisense RNA corresponding to a particular nematode gene.

These complementary RNA molecules pair with each other to form:

Double-Stranded RNA — dsRNA

The dsRNA triggers the RNA interference mechanism.

The complementary RNA effectively silences the target gene by preventing its normal expression.

As a result, the nematode is unable to successfully establish its infection in the transgenic tobacco plant.

Simplified Flow

Target gene sequence

↓

Complementary RNA

↓

dsRNA formation

↓

RNA interference

↓

Gene silencing

↓

Reduced nematode infection

Why is RNAi Important?

RNAi demonstrates how biotechnology can be used to protect crops without necessarily relying only on conventional chemical pesticides.

It can provide highly specific gene silencing against a selected target.

NEET Focus

Remember the complete association:

Meloidogyne incognita → Tobacco plant → RNAi → Gene silencing

And:

Complementary RNA → dsRNA → RNA interference → Target gene silencing

FINAL NCERT HIGH-YIELD MEMORY BLOCK

Before the NEET examination, remember these three additional biotechnology associations:

PCR

PCR → DNA amplification
Denaturation → Annealing → Extension
Taq polymerase → Thermus aquaticus

Bt Crops

cryIAc + cryIIAb → Cotton bollworm
cryIAb → Corn borer

RNAi

Meloidogyne incognita → Tobacco
Complementary RNA → dsRNA
dsRNA → RNA interference
RNAi → Gene silencing

29. WHY IS IT CALLED Bt?

The abbreviation: Bt comes from: Bacillus thuringiensis
Therefore: Bt crop → Crop containing an insecticidal gene derived from B. thuringiensis

30. BT TOXIN

The insecticidal protein is initially produced in an inactive form called:

Protoxin

The protoxin becomes active under suitable conditions inside the gut of susceptible insect larvae.

This is a very important NEET concept.

31. MECHANISM OF BT TOXIN

The process can be remembered as:

Bt protoxin

↓

Ingestion by insect

↓

Alkaline insect gut

↓

Activation of toxin

↓

Binding to specific receptors

↓

Pore formation

↓

Damage to intestinal cells

↓

Insect death

32. STEP-BY-STEP MECHANISM

Step 1: Ingestion

The insect larva feeds on the Bt crop and ingests the Bt protein.

Step 2: Activation

The alkaline environment of the insect gut helps convert the inactive protoxin into its active form.

Step 3: Receptor binding

The activated toxin binds to specific receptors on intestinal epithelial cells.

Step 4: Pore formation

The toxin disrupts the intestinal cell membrane by forming pores.

Step 5: Cell damage

The intestinal cells are damaged.

Step 6: Insect death

The insect eventually dies.

33. WHY IS BT TOXIN SELECTIVE?

Bt Cry proteins do not act as general poisons against every organism.

Their insecticidal activity depends on factors such as:

Appropriate gut conditions
Activation of the protoxin
Presence of specific receptors
Susceptibility of the insect

Therefore, different Cry proteins can have different insect targets.

NEET Trap

Do not memorize:

"Bt kills all insects."

Instead remember:

Specific Bt proteins act against susceptible target insects.

34. ADVANTAGES OF BT CROPS

Bt crops can provide:

Protection against specific insect pests
Reduced crop damage
Reduced dependence on some chemical insecticides
Improved crop protection
Potentially improved yield under suitable agricultural conditions

However, Bt technology is not a universal solution to all agricultural pests.

35. TRANSGENIC ANIMALS

Animals that carry and express a foreign gene introduced through genetic engineering are called:

Transgenic Animals

Examples include:

Transgenic mice
Transgenic rabbits
Transgenic sheep
Transgenic pigs
Transgenic cows
Transgenic fish

36. APPLICATIONS OF TRANSGENIC ANIMALS

Transgenic animals are important tools in modern biological research.

1. Studying Gene Function

They help researchers understand the function of specific genes.

2. Studying Human Diseases

Transgenic animals can act as experimental models for human diseases.

Examples include models for:

Cancer
Cystic fibrosis
Alzheimer's disease
Certain genetic disorders

3. Production of Biological Products

Transgenic animals can be engineered to produce valuable biological proteins.

4. Vaccine Testing

They can be used to study immune responses and evaluate potential vaccines.

5. Toxicity Testing

Transgenic animals can help researchers study the effects of chemicals and other substances.

37. TRANSGENIC ANIMALS — IMPORTANT NEET CONCEPT

The five major uses can be remembered as:

Gene function
Disease models
Biological products
Vaccine studies
Toxicity testing

38. BIOSAFETY

Biotechnology can provide major benefits, but genetically modified organisms and biological technologies may also raise safety and environmental concerns.

Biosafety

Biosafety refers to measures and practices designed to minimize risks associated with biological research, biotechnology and genetically modified organisms.

Potential concerns include:

Environmental effects
Effects on non-target organisms
Gene flow
Food safety
Ecological effects
Development of resistance
Ethical concerns

39. BIOSAFETY CONCERNS RELATED TO GM CROPS

1. Effects on Non-Target Organisms

A genetically modified crop may potentially affect organisms other than the intended target pest.

2. Gene Flow

A transgene may potentially move to related plants through pollen-mediated gene flow.

3. Pest Resistance

Continuous exposure to insecticidal proteins can contribute to selection for resistant insect populations.

4. Ecological Effects

Large-scale introduction of genetically modified organisms requires appropriate environmental assessment and monitoring.

40. BIOPIRACY

Definition

Biopiracy refers to the unauthorized or inappropriate exploitation of biological resources and/or traditional knowledge, especially when the source communities do not receive appropriate recognition or benefits.

It can involve:

Biological resources
Genetic resources
Traditional medicinal knowledge
Indigenous knowledge

41. BIOPIRACY AND INDIA

India has rich biodiversity and extensive traditional knowledge.

Several well-known intellectual-property controversies have involved Indian biological resources and traditional knowledge.

Important examples frequently discussed in biotechnology include:

Neem

Traditional knowledge regarding the biological properties of neem became associated with international patent disputes.

Turmeric

Traditional knowledge concerning the medicinal use of turmeric was involved in a well-known patent controversy.

Basmati

Basmati rice became associated with international intellectual-property disputes involving claims related to rice varieties and products.

NEET Focus

These examples highlight the relationship between:

Biodiversity + Traditional Knowledge + Intellectual Property

42. PATENTS

A patent is a legal intellectual-property right granted for a qualifying invention.

It generally gives the patent holder exclusive rights over the invention for a limited period, according to the relevant law.

In biotechnology, intellectual-property protection can involve:

Biotechnological inventions
Processes
Engineered products
Certain technological applications

43. BIOPIRACY VS PATENT

Do not confuse these terms.

Patent

A legal mechanism that provides intellectual-property protection for qualifying inventions.

Biopiracy

Unauthorized or inappropriate exploitation of biological resources or traditional knowledge.

Therefore:

Patent = Legal intellectual-property protection
Biopiracy = Unauthorized/inappropriate exploitation

44. BIOTECHNOLOGY IN HUMAN HEALTH

Major medical applications include:

Recombinant Proteins

Example: Human insulin

Recombinant Vaccines

Example: Hepatitis B vaccine

Gene Therapy

Example: ADA deficiency

Transgenic Models

Used to study human diseases.

Molecular Diagnosis

Biotechnology enables detection and characterization of genetic and infectious diseases.

45. BIOTECHNOLOGY IN AGRICULTURE

Important agricultural applications include:

Pest Resistance

Example: Bt cotton

Disease Resistance

Genetic engineering can contribute to development of disease-resistant crops.

Nutritional Improvement

Genetic modification can alter nutritional characteristics.

Stress Tolerance

Biotechnology can contribute to developing crops better adapted to environmental stresses.

46. HIGH-YIELD NEET CONCEPTS

Restriction enzyme: Cuts DNA at specific recognition sequences.

DNA ligase

Joins DNA fragments.

Plasmid

Common cloning vector.

ori

Origin of replication.

Selectable marker

Helps identify transformed cells.

Recombinant DNA

DNA produced by joining DNA fragments from different sources.

Transformation

Introduction of foreign DNA into a host cell.

Bioreactor

Used for controlled large-scale production of biological products.

Bt

Derived from Bacillus thuringiensis.

Cry protein

Insecticidal protein produced by Bt-based systems.

ADA deficiency

Classic example of gene therapy.

Transgenic animal

Animal carrying an introduced foreign gene.

Biopiracy

Unauthorized or inappropriate exploitation of biological resources or traditional knowledge.

47. NEET MEMORY TRICKS

Molecular Tools

Restriction enzyme → CUT
Ligase → JOIN
Vector → CARRY
ori → REPLICATE
Selectable marker → SELECT

Biotechnology Applications

Insulin → Recombinant DNA
Hepatitis B vaccine → Recombinant vaccine
ADA deficiency → Gene therapy
Bt cotton → Insect resistance
Transgenic animals → Research and biological products
Biopiracy → Biological resources + Traditional knowledge

48. COMPLETE CHAPTER IN ONE FLOW

Remember the entire chapter through this conceptual sequence:

Genetic engineering

↓

Recombinant DNA technology

↓

DNA isolation

↓

Restriction enzyme

↓

Desired gene

↓

Vector

↓

DNA ligase

↓

Recombinant DNA

↓

Host cell

↓

Selection and screening

↓

Gene expression

↓

Bioreactor

↓

Downstream processing

↓

Biotechnology product

49. NEET TRAP ALERTS

Trap 1

Restriction enzyme and DNA ligase are not the same.

Restriction enzyme cuts DNA.
DNA ligase joins DNA.

Trap 2

Bt does not mean all insects are killed.
Specific Bt proteins target susceptible insects.

Trap 3

Bt toxin is initially produced as a protoxin.
It becomes activated under suitable conditions in the gut of susceptible insects.

Trap 4

ADA deficiency is a classic example of gene therapy.

Remember:

ADA → Adenosine Deaminase

Trap 5

Transgenic animal and GMO are related but not identical terms.
GMO is a broad category.
A transgenic organism specifically carries genetic material introduced from another source through genetic engineering.

Trap 6

Bioreactor is not a cloning vector.
A vector carries DNA.
A bioreactor provides controlled conditions for large-scale biological production.

Trap 7

Biopiracy is not the same as biotechnology.
Biotechnology is a scientific technology.
Biopiracy is an issue involving unauthorized or inappropriate exploitation of biological resources or traditional knowledge.

50. ONE-MINUTE NEET REVISION

Biotechnology uses biological systems and processes to produce useful products.
Modern biotechnology mainly depends on genetic engineering and bioprocess engineering.
Restriction enzymes cut DNA at specific recognition sequences.
DNA ligase joins DNA fragments.
Plasmids can function as cloning vectors.
The ori is required for replication of the vector.
Selectable markers help identify transformed cells.
Recombinant DNA is produced by joining DNA fragments from different sources.
Recombinant DNA technology is used to produce human insulin and recombinant vaccines.
Gene therapy aims to treat disease by introducing or modifying genetic material.
ADA deficiency is a classic example of gene therapy.
Bt crops contain genes derived from Bacillus thuringiensis.
Bt genes can encode Cry proteins, which are toxic to susceptible insect pests.
Transgenic animals are useful for studying gene function, disease mechanisms, biological products, vaccine responses and toxicity.
Biosafety deals with minimizing potential risks associated with biotechnology and GM organisms.
Biopiracy involves unauthorized or inappropriate exploitation of biological resources or traditional knowledge.
Patents provide legal intellectual-property protection for qualifying inventions.

51. FINAL NEET MASTER REVISION

CUT

Restriction enzyme

↓

JOIN

DNA ligase

↓

CARRY

Vector

↓

REPLICATE

ori

↓

SELECT

Selectable marker

↓

EXPRESS

Host cell

↓

PRODUCE

Bioreactor

↓

APPLY

Insulin | Vaccines | Gene therapy | Bt crops | Transgenic animals

↓

PROTECT

Biosafety | Patents | Traditional knowledge

THE 15 FACTS YOU SHOULD NEVER FORGET

EcoRI is a restriction endonuclease.
Restriction enzymes recognize specific DNA sequences.
Many restriction sites are palindromic.
Restriction enzymes can generate sticky ends.
DNA ligase joins DNA fragments.
Plasmids can act as cloning vectors.
ori is the origin of replication.
Selectable markers help identify transformed cells.
Recombinant DNA contains DNA joined from different sources.
Recombinant technology can be used to produce human insulin.
Recombinant technology is used in production of hepatitis B vaccine.
ADA deficiency is a classic gene therapy example.
Bt comes from Bacillus thuringiensis.
Bt crops can produce insecticidal Cry proteins.
Biopiracy concerns unauthorized/inappropriate exploitation of biological resources or traditional knowledge.

FINAL MEMORY LINE

Cut with restriction enzymes → Join with ligase → Carry with vector → Introduce into host → Select → Express → Produce in bioreactor → Apply biotechnology safely.

Thank You

Thank you for studying with Science Coat.

Keep learning, keep questioning, and keep exploring the science behind every concept.

All the best for your NEET preparation.

Explore. Question. Evolve.