{"id":6110,"date":"2026-01-04T01:29:56","date_gmt":"2026-01-03T19:59:56","guid":{"rendered":"https:\/\/vajiramandravi.com\/upsc-exam\/?p=6110"},"modified":"2026-01-05T11:48:01","modified_gmt":"2026-01-05T06:18:01","slug":"recombinant-dna-technology","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/upsc-exam\/recombinant-dna-technology\/","title":{"rendered":"Recombinant DNA Technology – Process and Applications"},"content":{"rendered":"

Recombinant DNA technology (RDT),\u00a0<\/strong>often referred to as\u00a0Genetic Engineering,\u00a0<\/strong>is an in-vitro (lab) method of manipulating genes (DNA fragments) by using a set of tools and techniques. The primary aim of RDT is to produce \u201cTransgene (recombinant DNA) and its product (recombinant protein), to be applied across different fields of biotechnology.<\/p>\r\n

The RDT is a continuously evolving technology due to the advancement in its tools and techniques, such as the discovery of the CRISPR-Cas9 gene editing tool.<\/p>\r\n

Tools of Recombinant DNA Technology<\/h2>\r\n

The following are the tools employed in the process involved in Recombinant DNA Technology:<\/p>\r\n

\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n
Tools<\/strong><\/td>\r\nUtility<\/strong><\/td>\r\nExamples<\/strong><\/td>\r\n<\/tr>\r\n
Vector<\/strong><\/td>\r\nThey are used as\u00a0carriers\u00a0<\/strong>to introduce foreign DNA into a host cell<\/td>\r\n\r\n

- Plasmids\u00a0<\/strong>(for example, pBR322, Ti Plasmid),<\/p>\r\n

- YAC\u00a0<\/strong>(Yeast Artificial Chromosomes),<\/p>\r\n

-\u00a0BAC\u00a0<\/strong>(Bacterial Artificial Chromosomes),<\/p>\r\n

- Viruses (Phages), etc.<\/p>\r\n<\/td>\r\n<\/tr>\r\n

Restriction Enzymes<\/strong><\/td>\r\nIt recognises specific DNA sequences and cleaves the DNA at the precise location<\/td>\r\n\r\n

- EcoRI, HindIII, BamHI, etc<\/p>\r\n

-\u00a0CRISPR Cas9<\/strong>\u00a0( used primarily nowadays)<\/p>\r\n

-\u00a0Zinc-Finger Nuclease (ZFN)<\/strong><\/p>\r\n<\/td>\r\n<\/tr>\r\n

DNA Ligase<\/strong><\/td>\r\nIt joins together DNA fragments<\/td>\r\n- T4 DNA Ligase<\/td>\r\n<\/tr>\r\n
Selectable markers<\/strong><\/td>\r\nTo distinguish transformed cells from non-transformed ones<\/td>\r\n- Antibiotic resistance genes, herbicide resistance genes, etc<\/td>\r\n<\/tr>\r\n<\/tbody>\r\n<\/table>\r\n<\/figure>\r\n

Process involved in Recombinant DNA Technology<\/h2>\r\n

Recombinant DNA technology undergoes through the following steps:<\/p>\r\n

\"recombinant<\/p>\r\n

    \r\n\t
  • Isolation of Genetic Material:\u00a0<\/strong>The extraction of genetic material is performed from the source organism\u2019s DNA, such as bacteria, plants, or animals.<\/li>\r\n\t
  • Selection of a Suitable Cloning Vector:<\/strong>\u00a0Vectors are carrier molecules used to introduce rDNA into a host organism.\r\n\r\n
      \r\n\t
    • Plasmids<\/strong>, which are small, circular DNA molecules, are commonly used vectors. They can replicate independently within a host cell, allowing for the propagation of the foreign DNA.<\/li>\r\n\t
    • The vectors can also be\u00a0non-self replicating\u00a0<\/strong>(for example, viral vectors).<\/li>\r\n<\/ul>\r\n<\/li>\r\n\t
    • Cutting of DNA at Specific Locations:<\/strong>\u00a0It uses the specialized enzymes known as\u00a0restriction endonucleases<\/strong>\u00a0(RE) or\u00a0restriction enzymes,<\/strong>\u00a0which recognize specific DNA sequences (recognition sites) and cleave the DNA at those precise locations.\r\n\r\n
        \r\n\t
      • The RE cuts the\u00a0target DNA as well as Plasmid<\/strong>, producing \"sticky ends\" that are complementary to each other.<\/li>\r\n<\/ul>\r\n<\/li>\r\n\t
      • Joining of DNA Fragments by Ligation:<\/strong>\r\n
          \r\n\t
        • The isolated DNA fragments are combined with a vector, which is typically a plasmid or a viral genome modified to accept foreign DNA.<\/li>\r\n\t
        • DNA ligase is used to catalyze the formation of phosphodiester bonds, effectively sealing the gaps and fusing the DNA fragments with the vector.<\/li>\r\n\t
        • Now the rDNA is ready for gene transfer (for in-vivo gene cloning) or for the PCR.<\/li>\r\n<\/ul>\r\n<\/li>\r\n\t
        • Gene Transfer:\u00a0<\/strong>There are several methods which are employed in the process of Gene Transfer- physical, chemical, and biological. RDT uses the biological means of gene transfer.\r\n\r\n
            \r\n\t
          • Physical methods: Gene gun\u00a0<\/strong>or Biolistics,\u00a0Electroporation, Microinjection<\/strong>, etc., which make the direct entry of the rDNA into the host\u2019s cell.<\/li>\r\n\t
          • Chemical methods:<\/strong>\u00a0Using\u00a0Lipofection, calcium phosphate<\/strong>, etc. make it easier for the rDNA to enter into the host\u2019s cell.<\/li>\r\n\t
          • Biological methods:\u00a0<\/strong>This is an indirect method of gene transfer, using vectors (for example, bacteria) as a means.<\/li>\r\n<\/ul>\r\n<\/li>\r\n\t
          • Gene Cloning:\u00a0<\/strong>Once inside the host, the rDNA replicates itself independently (due to self-replicating\u00a0plasmid)<\/strong>. This is called Gene Cloning. It can also be done using the PCRmethod for amplifying a gene of interest.<\/li>\r\n\t
          • Polymerase Chain Reaction (PCR):\u00a0<\/strong>PCR is a tool that allows for the amplification of the target DNA sequences outside the cell. It needs much less time than the traditional cloning methods.<\/li>\r\n\t
          • Selection and Screening of Transformed Cells:\u00a0<\/strong>This step involves identifying and isolating cells that have successfully taken up the\u00a0recombinant DNA<\/strong>.\r\n\r\n
              \r\n\t
            • Selectable markers<\/strong>, such as\u00a0antibiotic resistance genes<\/strong>\u00a0carried by the vector, are often used to distinguish transformed cells from non-transformed ones.<\/li>\r\n<\/ul>\r\n<\/li>\r\n\t
            • Validation of Recombinant DNA Integration:\u00a0<\/strong>To ensure that the recombinant DNA has integrated into the host genome as intended, various techniques may be employed.\r\n\r\n
                \r\n\t
              • For example,\u00a0nucleic acid hybridization, blue-white screening<\/strong>, etc.<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>\r\n

                \"process-involved-in-recombinant-dna-technology\"<\/p>\r\n

                Applications of Recombinant DNA Technology<\/h2>\r\n

                Recombinant DNA Technology stands as a cornerstone of modern science with far-reaching applications across numerous fields.<\/p>\r\n

                  \r\n\t
                • Advancement in Medicine<\/strong>:\r\n\r\n
                    \r\n\t
                  • It enables the production of vital\u00a0biopharmaceuticals<\/strong>, particularly\u00a0therapeutic proteins<\/strong>\u00a0like\u00a0insulin<\/strong>, growth hormone, and clotting factors.<\/li>\r\n\t
                  • Customized Therapeutics<\/strong>\u00a0enables the production of personalised medicines tailored to an individual's genetic makeup, leading to more effective and targeted treatments.<\/li>\r\n<\/ul>\r\n<\/li>\r\n\t
                  • Gene Therapy:<\/strong>\r\n
                      \r\n\t
                    • It offers the potential to treat genetic disorders by replacing or repairing\u00a0faulty genes.<\/strong><\/li>\r\n\t
                    • It is helpful in treating a wide range of diseases, like\u00a0cystic fibrosis<\/strong>,\u00a0muscular dystrophy<\/strong>, and certain types of\u00a0cancer<\/strong>.<\/li>\r\n<\/ul>\r\n<\/li>\r\n\t
                    • Recombinant Vaccines:<\/strong>\u00a0RDT can be used to develop\u00a0vaccines\u00a0<\/strong>for a variety of diseases, using vectors like bacteria, yeasts, viruses (phage), etc.<\/li>\r\n\t
                    • Immunotherapy:\u00a0<\/strong>RDT contributes to the development of\u00a0immunotherapies\u00a0<\/strong>for example,\u00a0T-cell therapy<\/strong>, which harnesses the body's own immune system to target and\u00a0destroy cancer cells.<\/strong><\/li>\r\n\t
                    • Agricultural Advancements:<\/strong>\r\n
                        \r\n\t
                      • It is used to cultivate\u00a0Genetically modified (GM) crops<\/strong>\u00a0that have transformed agriculture. Example:\u00a0BT cotton<\/strong>.<\/li>\r\n\t
                      • These crops possess traits like\u00a0pest resistance<\/strong>,\u00a0drought tolerance<\/strong>, and improved\u00a0nutritional content<\/strong>.<\/li>\r\n<\/ul>\r\n<\/li>\r\n\t
                      • Bioremediation and Environmental Protection:<\/strong>\r\n
                          \r\n\t
                        • Environmental biotechnology indicates that\u00a0Genetically-modified\u00a0<\/strong>microbes such as bacteria, yeast and filamentous fungi can\u00a0remove heavy metals<\/strong>\u00a0from aqueous solutions.<\/li>\r\n\t
                        • For example,\u00a0Escherichia coli strain JM109<\/strong>\u00a0has the ability to\u00a0remove mercury<\/strong>\u00a0from contaminated water or soil.<\/li>\r\n<\/ul>\r\n<\/li>\r\n\t
                        • Targeted Drug Delivery:\u00a0<\/strong>\r\n
                            \r\n\t
                          • It enables the design and production of drug-delivery systems that can precisely target specific tissues or cells within the body.<\/li>\r\n\t
                          • This increases the effectiveness of treatments while minimizing side effects.<\/li>\r\n<\/ul>\r\n<\/li>\r\n\t
                          • Molecular diagnosis (RDT plus PCR):<\/strong>\r\n
                              \r\n\t
                            • It plays a critical role in diagnostic techniques, allowing for the detection of specific DNA sequences associated with diseases or pathogens.<\/li>\r\n\t
                            • It is helpful in early detection and monitoring of various conditions.<\/li>\r\n<\/ul>\r\n<\/li>\r\n\t
                            • Industrial Applications:<\/strong>\r\n
                                \r\n\t
                              • It is used in the production of recombinant enzymes to produce\u00a0sugar<\/strong>,\u00a0cheese,\u00a0<\/strong>biofuels, important chemicals, etc.<\/li>\r\n<\/ul>\r\n<\/li>\r\n<\/ul>","protected":false},"excerpt":{"rendered":"

                                Recombinant DNA technology is a process that involves editing and combining DNA molecules from different sources that enable scientists to create hybrid DNA sequences.<\/p>\n","protected":false},"author":6,"featured_media":20099,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[239],"tags":[40,764],"class_list":{"0":"post-6110","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-quest-level-4","8":"tag-quest","9":"tag-recombinant-dna-technology"},"acf":[],"_links":{"self":[{"href":"https:\/\/vajiramandravi.com\/upsc-exam\/wp-json\/wp\/v2\/posts\/6110","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vajiramandravi.com\/upsc-exam\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vajiramandravi.com\/upsc-exam\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/upsc-exam\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/upsc-exam\/wp-json\/wp\/v2\/comments?post=6110"}],"version-history":[{"count":1,"href":"https:\/\/vajiramandravi.com\/upsc-exam\/wp-json\/wp\/v2\/posts\/6110\/revisions"}],"predecessor-version":[{"id":19868,"href":"https:\/\/vajiramandravi.com\/upsc-exam\/wp-json\/wp\/v2\/posts\/6110\/revisions\/19868"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/upsc-exam\/wp-json\/wp\/v2\/media\/20099"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/upsc-exam\/wp-json\/wp\/v2\/media?parent=6110"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/upsc-exam\/wp-json\/wp\/v2\/categories?post=6110"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/upsc-exam\/wp-json\/wp\/v2\/tags?post=6110"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}