NEET Biology Biotechnology And Its Applications Revision Notes

Revision Notes for Full Course Biotechnology and Its Applications: Microbes in Human Welfare

Review targeted revision notes for Full Course Biotechnology and Its Applications with the NEET Biology Biotechnology And Its Applications Revision Notes. Built according to official educational guidelines for the 2026-27 academic year, these downloadable summaries for Microbes in Human Welfare support daily study and last-minute exam readiness.

Review Microbes in Human Welfare for Full Course Biotechnology and Its Applications

Access the complete concept summary PDF for Microbes in Human Welfare below. Regular review of these targeted notes builds familiarity with complex Full Course Biotechnology and Its Applications themes and helps secure higher marks in final school evaluations.

Recombinant DNA technology
 
Definition:
 
Genetic engineering, a kind of biotechnology, is the latest branch in applied genetics dealing the alteration of the genetic makeup of cells by deliberate and artificial means. Genetic engineering involves transfer or replacement of genes, so also known as recombination DNA technology or gene splicing.
 
Tools of genetic engineering:
 
(1) Two enzymes used in genetic engineering are restriction endonuclease and ligases.
(2) R.E. is used to cut the plasmid as well as the foreign DNA molecules of specific points while ligase is used to seal gaps or to join bits of DNA.
(3) The ability to clone and sequence essentially any gene or other DNA sequence of interest from any species depends on a special class of enzymes called restriction endonucleases.
(4) Restriction endonucleases are also called as molecular scissors or ‘chemical scalpels’.
(5) Restriction endonucleases cleave DNA molecules only at specific nucleotide sequence called restriction sites.
(6) The first restriction enzyme identified from a bacterial strain is designated I, the second II and so on, thus, restriction endonuclease EcoRI is produced by Escherichia coli strain RY 13.
(7) Restriction enzyme called EcoRI recognizes the sequence
 
NEET Biology Biotechnology and its Applications Revision Notes
 
(8) It then cleaves the DNA between G and A on both strands. Restriction nucleases make staggered cuts; that is, they cleave the two strands of a double helix at different joints and blunt ended fragments; that is, they cut both strands at same place.
 
Steps of recombinant DNA technology
(1) Isolating a useful DNA segment from the donor organism.
(2) Splicing it into a suitable vector under conditions to ensure that each vector receives no more than one DNA fragment.
(3) Producing of multiple copies of his recombinant DNA.
(4) Inserting this altered DNA into a recipient organism.
(5) Screening of the transformed cells.
 
Vectors:
 
Vector in genetic engineering is usually a DNA segment used as a carrier for transferring selected DNA into living cells. These are as follows:
NEET-Biology-Biotechnology-and-Its-Applications-Revision-Notes 1
 
(1) Plasmid: Plasmid is extra chromosomal, closed circular double stranded molecules of DNA present in most eukaryotes. All plasmid carry replicons pieces of DNA that have the genetic information required to replicate. Plasmid pBR 322 was one of the first widely used cloning vectors, it contain both ampicillin and tetracycline resistance genes.
 
(2) Phage: It is constructed from the phage l chromosomes and acts as bacteriophage cloningvectors.
 
(3) Cosmid: The hybrids between plasmid and the phage l chromosome give rise to cosmid vectors.
 
(4) Beside all these there are artificial chromosomes like
(i) BACs (Bacterial Artificial chromosomes)
(ii) YACs (Yeast Artificial chromosomes)
(iii) MACs (Mammalian Artificial chromosomes) are very efficient vectors for eukaryotic gene transfers.
 
Application of recombinant DNA technology:
 
The technique of recombinant DNA can be employed in the following ways.
(1) It can be used to elucidate molecular events in the biological process such as cellular differentiation and ageing. The same can be used for making gene maps with precision.
(2) In biochemical and pharmaceutical industry, by engineering genes, useful chemical compounds can be produced cheaply and efficiently which is shown in table.
 
Applications of recombinant DNA products
NEET-Biology-Biotechnology-and-Its-Applications-Revision-Notes 2
Cloning:
 
Cloning is the process of producing many identical organisms or clones. In this process nucleus of ovum (n) is removed and replaced by nucleus of diploid cell of same organism. Now the egg with 2n nucleus is transferred to the uterus of mother to have normal pregnancy and delivers clone of itself.

Free study material for Biology

Study Material and Revision Notes for Full Course Biotechnology and Its Applications Microbes in Human Welfare

Quick Revision Notes: Microbes in Human Welfare (NEET)

Review targeted chapter notes for Full Course Biotechnology and Its Applications Microbes in Human Welfare. Built according to official NEET guidelines, these summaries highlight high-yield topics frequently tested in school evaluations.

Expert Study Material for Full Course Biotechnology and Its Applications

Cross-reference your comprehension with comprehensive NCERT solutions for Full Course to ensure absolute clarity across all sub-topics in this chapter.

Complete Your Chapter Revision

Follow up your revision by attempting the interactive online Biotechnology and Its Applications MCQ test and practice worksheets for this chapter to verify your mastery. All platform resources are free to access.

FAQs

Where can I download the latest PDF for NEET Biology Biotechnology And Its Applications Revision Notes?

You can download the teacher prepared revision notes for NEET Biology Biotechnology And Its Applications Revision Notes from StudiesToday.com. These notes are designed as per 2026-27 academic session to help Full Course students get the best study material for Biotechnology and Its Applications.

Are these Biotechnology and Its Applications notes for Full Course based on the 2026 board exam pattern?

Yes, our NEET Biology Biotechnology And Its Applications Revision Notes include 50% competency-based questions with focus on core logic, keyword definitions, and the practical application of Biotechnology and Its Applications principles which is important for getting more marks in 2026 NEET exams.

Do these Full Course notes cover all topic-wise concepts for Biotechnology and Its Applications?

Yes, our NEET Biology Biotechnology And Its Applications Revision Notes provide a detailed, topic wise breakdown of the chapter. Fundamental definitions, complex numerical formulas and all topics of NEET syllabus in Full Course is covered.

How can I use NEET Biology Biotechnology And Its Applications Revision Notes for quick last-minute revision?

These notes for Biotechnology and Its Applications are organized into bullet points and easy-to-read charts. By using NEET Biology Biotechnology And Its Applications Revision Notes, Full Course students fast revise formulas, key definitions before the exams.

Is there any registration required to download Full Course Biotechnology and Its Applications notes?

No, all study resources on StudiesToday, including NEET Biology Biotechnology And Its Applications Revision Notes, are available for immediate free download. Full Course Biotechnology and Its Applications study material is available in PDF and can be downloaded on mobile.