Modern Biotechnology: Principles, Techniques, and Applications

Administrative and Publication Metadata

  • Document Title & Context: Biotechnology Activity Sheet No. 2 – Modern Biotechnology (Quarter 2, MELC 2, Week 2, Grade 8).
  • Publication Year & Edition: First Edition, 2021.
  • Publishing Authority: Department of Education (DepEd) Region VI – Western Visayas, Philippines. Produced in collaboration with the Schools Division of Silay City and the Curriculum Learning Management Division (CLMD).
  • Legal Copyright Notice: Governed by Republic Act 8293, Section 176. No copyright subsists in any work of the Government of the Philippines. Prior approval of the creating government agency or office is required for commercial exploitation, and payment of royalties may be imposed as a condition.
  • Development and Management Teams:
    • Writer: Ruby Ann Dahay-Angelino
    • Editors: Daisy L. Lopez, Carmel Joy P. Aujero
    • Layout Artist: Jerry R. Bagiuos
    • Schools Division Quality Assurance Team: Ma. Cristina G. Caballero, Reynaldo A. Sumaylo, Lovenia D. Pansaon, Daisy L. Lopez, Carmel Joy P. Aujero
    • Division of Silay City Management Team: Ma. Cristina G. Caballero, Reynaldo A. Sumaylo, Lovenia D. Pansaon, Daisy L. Lopez, Carmel Joy P. Aujero
    • Regional Management Team: Ramir B. Uytico, Pedro T. Escobar, Jr., Elena P. Gonzaga, Donald T. Genine, Rovel R. Salcedo, Moonyeen C. Rivera, Anita S. Gubalane, Minda L. Soldevilla, Daisy L. Lopez, Joseph M. Pagalaran

Overview of Modern Biotechnology

  • Core Value: Modern biotechnology enhances the understanding of biological systems and drives the creation of novel products and processes.
  • Fields of Application: Key sectors utilizing modern biotechnology include:
    • Food production
    • Agriculture (identified as one of the most extensive application domains, citing Khillar, 2020)
    • Forestry
    • Healthcare
    • Environmental science
    • Mineral processing
    • Industrial processes
  • Plant Characteristic Innovation: Plants exhibiting unique traits are engineered using recombinant DNA methods and mutagenesis.
  • Biotech Diagnostics: Modern diagnostic tools detect a vast spectrum of diseases and genetic disorders.
  • Core Modern Techniques:
    1. Recombinant DNA Technology (rDNA or genetic engineering)
    2. Plant Tissue Culture
    3. Transgenic Techniques (Genetically Modified Organisms)

Recombinant DNA Technology (Genetic Engineering)

  • Definition & Scope: Genetic engineering encompasses the artificial synthesis of genes, gene repair, the joining of DNA from two distinct organisms (recombinant DNA), and the manipulation of synthetic genes combined with recombinant DNA to improve microbes, plants, animals, and humans.
  • Operational Process: Relies on the precise cutting and pasting of selected DNA fragments.
  • Key Biological Discoveries in Bacteria:
    • Plasmids: Extrachromosomal DNA molecules in bacteria capable of replication both in conjunction with and independently of chromosomal DNA.
    • Restriction Endonucleases: Bacterial enzymes that cut DNA at specific nucleotide sites, serving as "molecular scissors."

Plant Tissue Culture

  • Rationale & Background: Developed to safeguard and propagate plants against natural and anthropogenic disasters, addressing humanity's fundamental reliance on plants for food, shelter, and clothing.
  • Core Mechanism: A technique that allows a whole, fully developed plant to regenerate from a single cell or a small excised plant segment.
  • Categories of Tissue Culture: Includes cell culture, protoplast culture, organ culture, and meristem culture.
  • Organ Culture Classifications: Involves distinct plant organs, specifically:
    • Anther culture
    • Ovule culture
    • Embryo culture
    • Bud culture

Transgenic Organisms and Genetic Transformation

  • Transgenic / Genetically Modified Organisms (GMOs): Organisms possessing genotypes developed through genetic engineering techniques. Includes plants, animals, and microorganisms such as fungi, bacteria, and viruses.
  • Transgenic Plants (GM Plants): Plants developed via the combined application of tissue culture and genetic engineering.
  • Genetic Transformation: The procedure of transferring, integrating, and expressing a transgene within a target organism.
  • Transgenes: Foreign or modified genes from the same or different species used to develop transgenic genotypes. Source origins include:
    • The same species (in modified form)
    • Related wild species
    • Unrelated species
    • Microorganisms (bacteria, fungi, and viruses)
  • Transgenic Breeding: The genetic improvement of crops, livestock, and beneficial microbes using tissue culture and genetic engineering for economic utility.

Educational Reflection and Source References

  • Target Competency: Ability to explain and evaluate key practices and techniques used in modern biotechnology.
  • Academic Reflection: Understanding modern biotechnology techniques equips students with foundational knowledge essential for future academic research and scientific inquiry.
  • Literature and Reference Links:
    • Biology Discussion: https://www.biologydiscussion.com/biotechnology/techniques-biotechnology/important-techniques-of-biotechnology-3-techniques/15683 (Accessed August 13, 2021)
    • All About Biotechnology: http://allaboutbiotechnology.blogspot.com/2008/06/traditional-biotechnology-vs-new.html (Accessed August 13, 2021)
    • Difference Between: http://www.differencebetween.net/technology/difference-b-etween-traditional-and-modern-biotech/#ixzz73JrVMUAW (Accessed August 13, 2021)
    • EdrawMax Graphic Organizer: https://www.edrawmax.com/graphic-organizer/ (Accessed August 13, 2021)
    • Science Learning Hub: https://www.sciencelearn.org.nz/resources/1206-modern-biotechnology (Accessed August 13, 2021)