Traditional vs modern biotechnology, where exactly is the line? And what was the first recombinant DNA made from?
Siddharth RaoDropper Sample
23 Aug 2026 Β· 1 min read
Second attempt, so I'm going back through the chapters I skipped the first time because they felt like "just theory". Biotechnology Principles and Processes is one of them, and yes, I lost marks on it.
NCERT gives two definitions. One is the broad use of live organisms or enzymes to make products and processes useful to humans (curd, bread, wine are traditional examples). The European Federation of Biotechnology (EFB) definition is the integration of natural science and organisms, cells, parts thereof, and molecular analogues for products and services. NCERT then says modern biotechnology includes things like IVF (test-tube babies), synthesising a gene and using it, developing a DNA vaccine, and correcting a defective gene.
My confusions:
- In an MCQ, "which is NOT an example of modern biotechnology" had curd, IVF, rDNA insulin and gene therapy. I got it right, but only by luck. Where is the line, in a sentence?
- NCERT names two core techniques that made modern biotech possible: genetic engineering, and "maintenance of sterile ambience". Is the second one the same as bioprocess engineering?
- The first recombinant DNA: I have in my notes "Cohen and Boyer 1972, plasmid from E. coli with an antibiotic resistance gene". I'm not sure the bacterium is right.
6 answers & replies
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[+][β]Nisha Verma12thSampleΒ· 1mo ago
One-sentence line: traditional biotechnology uses whole organisms (usually microbes) in processes we have known for centuries, like fermentation to make curd, bread, wine, without changing the genes of the organism. Modern biotechnology deliberately works at the level of genes and cells (rDNA, gene cloning, IVF, gene therapy) or runs those processes at scale in controlled industrial conditions. So in your MCQ, curd is the odd one out.
[+][β]Tanvi Deshmukh12thSampleΒ· 1mo ago
Cohen and Boyer 1972!!! They linked a gene for antibiotic resistance to a plasmid of E. coli using restriction enzymes and ligase, and put it into E. coli, and the bacteria became resistant. First recombinant DNA. That's how I've written it with a star next to it!!
[+][β]Rahul DubeyDropperSampleΒ· 1mo ago
Tanvi, small fix, and NEET loves this one: the plasmid was from Salmonella typhimurium. Cohen and Boyer (1972) linked an antibiotic-resistance gene with a native plasmid of Salmonella typhimurium, using restriction enzymes to cut and DNA ligase to join, and then introduced the recombinant DNA into E. coli, where it multiplied. NCERT says this made "the first recombinant DNA". The host E. coli is where it was transferred, not where the plasmid came from.
[+][β]Siddharth RaoDropperSampleΒ· 1mo agoAuthor
Salmonella, host E. coli, got it. Thanks Rahul, Tanvi too. This is the kind of detail that costs 4 marks over a whole test series.
[+][β]Kavya NaikDropperSampleΒ· 1mo ago
For your second question, yes. NCERT's two core techniques:
- Genetic engineering: techniques to alter the chemistry of genetic material (DNA/RNA), to introduce these into host organisms and thus change the phenotype of the host organism.
- Bioprocess engineering: maintenance of sterile (contamination-free) ambience in chemical engineering processes so that only the desired microbe or eukaryotic cell grows in large quantities, for making products like antibiotics, vaccines, enzymes.
Think "gene part" and "factory part". Without the factory part, you can have a great recombinant bacterium in a flask and no way to make it in thousands of litres.
[+][β]Farhan ShaikhDropperSampleΒ· 1mo ago
Also remember the three basic steps of genetically modifying an organism, since they appear in some assertion-reason as well: (i) identify the DNA with desirable genes, (ii) introduce it into the host, (iii) maintain the introduced DNA in the host and transfer it to the progeny. If it's not maintained and passed on, the modification is useless, so a gene that gets in but isn't inherited does not count.
