Applications of Genetic Engineering Revision Notes | GCSE OCR Foundation Biology

What this lesson covers

Explore real-world uses of genetic engineering including GM crops with improved disease resistance and yields, and bacteria engineered to produce human...

• Explain how genetic engineering is used to create GM crops with improved characteristics
• Describe the production of human insulin using genetically modified bacteria
• Evaluate the benefits and concerns of genetic modification in agriculture and medicine
• Apply knowledge of genetic engineering to suggest solutions for inherited disorders

Key ideas to keep in view

Use this lesson to stay inside B6.2 Feeding the human race while connecting the detail back to the wider B6: Global challenges topic.

• B6: Global challenges
• B6.2 Feeding the human race
• GCSE OCR Foundation Biology

Lesson notes preview

Read the core explanations from Applications of Genetic Engineering before testing yourself from memory.

• Imagine taking the best features from different organisms and combining them into one super-organism. That's essentially what genetic engineering does - scientists can now cut and paste genes between completely different species.
• The process of artificially modifying an organism's DNA by inserting genes from another species to give it new characteristics.
• This isn't science fiction - it's happening right now in laboratories worldwide. Scientists can take a gene that makes jellyfish glow and put it into bacteria, or take a human gene for insulin production and insert it into bacterial cells.
• The key insight is that DNA is universal - the same four bases (A, T, G, C) work in every living thing. A human gene can function perfectly well inside a bacterial cell because they both use the same genetic code.
• Plant crops have been genetically engineered to solve real-world agricultural problems. Instead of waiting decades for natural breeding, scientists can directly insert the exact genes needed.
• Genetically modified crops that have had their genes altered to improve characteristics like disease resistance, herbicide tolerance, or nutritional content.
• Disease Resistance: Scientists can insert genes from naturally resistant plants or even bacteria into crop plants. For example, Bt corn contains a gene from Bacillus thuringiensis bacteria that produces a protein toxic to insect pests but harmless to humans.
• Herbicide Tolerance: Crops can be engineered to survive specific herbicides. Farmers can then spray fields to kill weeds without harming their crops. Roundup Ready soybeans contain a gene that makes them immune to glyphosate herbicide.
• Improved Nutrition: Golden rice has been engineered to produce beta-carotene (vitamin A precursor) to combat vitamin A deficiency in developing countries. The rice grains turn golden yellow due to the accumulated beta-carotene.
• GM crops generally show increased yields because they suffer less damage from pests, diseases, and competition from weeds. This means more food can be produced from the same area of land.

Continue through the topic

Move to the related lessons or back to the topic page when you need the wider sequence before exam-style practice.