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Flash Cards: An Overview of Recombinant DNA Technology

This chapter introduces recombinant DNA technology, highlighting its origins and significance in molecular biology and genetic engineering.

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An Overview of Recombinant DNA Technology - Flash Cards

These flash cards cover important concepts from An Overview of Recombinant DNA Technology in Biotechnology for Class 12 (Biotechnology).

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What is Recombinant DNA Technology?

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Recombinant DNA Technology involves the direct manipulation of an organism's DNA to alter its genetic makeup, allowing for the transfer of genes between organisms.

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Who are the pioneers of rDNA technology?

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Stanley Cohen and Herbert Boyer are credited with developing recombinant DNA technology and creating the first genetically modified organisms in 1973.

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Define 'plasmid'.

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A plasmid is a small, circular piece of DNA that exists independently of chromosomal DNA in bacteria and can replicate independently.

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What is the role of restriction enzymes?

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Restriction enzymes act as molecular scissors that cut DNA at specific sequences, allowing for the isolation and manipulation of genes.

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What is 'ligation' in DNA technology?

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Ligation is the process of joining two DNA fragments together, typically performed by the enzyme DNA ligase.

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Explain gene cloning.

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Gene cloning involves making multiple copies of a specific gene by inserting it into a host organism's DNA for replication.

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What is the significance of the Human Genome Project?

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The Human Genome Project aimed to map and understand all the genes of the human species, paving the way for advancements in genetic research and medicine.

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What is a genetically modified organism (GMO)?

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A GMO is an organism whose genetic material has been altered using genetic engineering techniques, often to express desired traits.

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List two applications of rDNA technology.

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1. Production of human insulin for diabetes treatment. 2. Development of genetically modified crops for disease resistance.

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What does 'transgenic organism' mean?

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A transgenic organism contains a gene or genes which have been artificially inserted instead of the organism acquiring them through reproduction.

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What are 'hybridoma cells'?

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Hybridoma cells are formed by fusing a specific antibody-producing B cell with a myeloma (cancer) cell, used for producing monoclonal antibodies.

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Explain RNA interference.

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RNA interference is a biological process in which RNA molecules inhibit gene expression or translation, effectively silencing targeted genes.

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What is the purpose of DNA sequencing?

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DNA sequencing is the process of determining the precise order of nucleotides in a DNA molecule, which is essential for understanding genetic information.

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Define 'gene therapy'.

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Gene therapy involves introducing or altering genes within an individual's cells to treat or prevent disease, aiming to correct genetic disorders.

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What is 'PCR' and its significance?

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Polymerase Chain Reaction (PCR) is a method used to amplify specific DNA segments, making millions of copies for analysis, crucial in genetic research.

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What is the role of Agrobacterium in rDNA technology?

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Agrobacterium is used as a vector for transferring genes into plant cells, enabling the creation of genetically modified plants.

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What are 'recombinant vaccines'?

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Recombinant vaccines are created using recombinant DNA technology; they contain genes encoding antigens from a pathogen, stimulating an immune response.

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List one common mistake in rDNA experiments.

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One common mistake is not verifying the correct insertion of the gene into the plasmid, leading to failed experiments in gene expression.

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Difference between type I and type II restriction enzymes.

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Type I restriction enzymes cut DNA at random sites far from their recognition sequences, while type II enzymes cut at specific, known sites within the recognition sequence.

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What is the outcome of successful gene cloning?

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Successful gene cloning results in the generation of multiple copies of a specific gene, which can be used for research, therapeutic, or industrial purposes.