Genetically modified organisms in agriculture — common mistakes

For Paper 4, remember that 'discuss' and 'evaluate' questions require a balanced argument. Always aim to present both sides (advantages and disadvantages or arguments for and against) and provide specific biological examples (e.g., Bt maize, Golden Rice) to support your points. Use precise terminology correctly, especially when describing the genetic modification process or potential risks like 'gene flow'.

In Cambridge Biology 9700, the main benefits of genetically modified organisms (GMOs) in agriculture include increased crop yield through pest or herbicide resistance (e.g., Bt maize), improved nutritional value (e.g., Golden Rice providing Vitamin A), and enhanced tolerance to environmental stresses like drought. To understand these in detail and practice with past papers, check out our free revision course.

A-Level Biology students should be aware of several ethical concerns with genetically modified crops. These include potential long-term human health impacts (allergens, toxicity), environmental risks like gene flow to wild plants, and socio-economic issues such as farmer dependency on large corporations. You can find comprehensive lessons and past papers to help you master these discussions on our platform.

In the 9700 syllabus, genetically modified crops differ from selectively bred crops primarily in their precision and speed. Genetic modification involves directly inserting, deleting, or modifying specific genes using techniques like Agrobacterium tumefaciens or gene guns, allowing for rapid and targeted trait introduction, often between unrelated species. Selective breeding, conversely, involves cross-breeding organisms with desirable traits over many generations, relying on natural variation within a species and is much less precise. Our premium resources offer detailed explanations and practice questions to solidify your understanding.