Downstream Processing in Biotechnology — NEET Biology
✅ Asked in NEET 2017The process of separation and purification of expressed protein before marketing is called: (NEET 2017)
The process of separation and purification of expressed protein before marketing is called: (NEET 2017)
Which of the following is not a component of downstream processing? (NEET 2016)
Answer & NCERT explanation
Correct answer: B — Downstream processing
Downstream processing refers to the recovery and purification of biosynthetic products, particularly proteins, from cultivation. After protein expression in bioreactors, the crude product must be separated, purified, and formulated before marketing. This includes cell harvesting, product isolation, purification through chromatography, and final formulation. Upstream processing involves cultivation and expression, while bioprocessing is a broader term encompassing the entire process.
Read more NCERT concept on the PYQ
The processes include separation and purification, which are collectively referred to as downstream processing. The product has to be formulated with suitable preservatives. Such formulation has to undergo thorough clinical trials as in case of drugs. Strict quality control testing for each product is also required. The downstream processing and quality control testing vary from product to product.
Downstream processing refers to the separation and purification of biotechnology products after they are produced. Students often confuse this with upstream processing (fermentation/culture) or forget that it includes formulation, preservation, and quality control. The key trap is thinking downstream processing ends at purification—it actually continues through formulation with preservatives and rigorous clinical/quality testing. Remember: separation and purification are the core steps, but the complete downstream process ensures the final product is safe, stable, and ready for use. NTA tests this because it's a critical industry step that distinguishes raw biotech products from market-ready medicines.
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