Introduction to Biotechnology — Maharashtra (SSC) Class 9 Science Solutions (Free)

Biotechnology is the use of living organisms or their products to solve practical problems and produce useful substances. Main fields: Agricultural biotechnology (improved crops), Medical biotechnology (vaccines, medicines), Industrial biotechnology (fermentation), Environmental biotechnology (biofuels, waste treatment).

Genetic engineering is the process of introducing foreign DNA into an organism to impart new traits. Example: Bt cotton has a gene from the bacterium Bacillus thuringiensis inserted into its genome, making it resistant to cotton pests, reducing pesticide use.

Biotechnology produces insulin for diabetes treatment using genetically engineered bacteria. It develops vaccines for diseases like polio and COVID-19. Gene therapy treats genetic disorders by replacing defective genes. Monoclonal antibodies help diagnose and treat cancer and autoimmune diseases.

Fermentation is an anaerobic process where microorganisms break down glucose to produce useful products without oxygen. Industrial application: Production of yogurt - lactic acid bacteria ferment milk lactose, producing lactic acid that curdles milk, creating yogurt with increased shelf life.

Biotechnology creates disease-resistant varieties and increased-yield crops through selective breeding and genetic modification. Examples: Golden rice enriched with vitamin A, drought-resistant wheat varieties, pest-resistant crops. This improves food security and reduces crop losses.