In agricultural biotechnology, scientists have developed transgenic crop varieties, such as drought-tolerant tomato lines, by introducing specific stress-response genes (e.g., the LeDREB gene) into commercial cultivars.
Explain the biological role of a vector in this genetic engineering process.
Identify one specific example of a vector that could be used to transfer this gene into the tomato plant cells.
30 exam-style questions on Edexcel IGCSE Biology Genetic modification (genetic engineering). Each one has a worked solution and a mark scheme showing where the marks go.