Antibiotic resistance genes have been used as markers when making some GM crops. Some scientists are concerned about this. Which is the most likely reason for their concern?
The gene could pass to pathogens, making infections harder to treat.
The antibiotic would kill the GM crop plants once they are planted.
People who eat the crop would become immune to bacterial diseases.
The marker gene would stop the useful gene being expressed in the crop.
127 exam-style questions on OCR GCSE Biology 6.2 Feeding the human race, covering 6.2.1 Biological factors affecting food security, 6.2.2 Agricultural solutions to growing demand, 6.2.3 Selective breeding, 6.2.4 Genetic engineering, 6.2.5 Steps in genetic engineering, 6.2.6 Benefits and risks of gene technology in agriculture, and 6.2.7 Biotechnological solutions to growing demand. Each one has a worked solution and a mark scheme showing where the marks go.