Agricultural scientists have genetically engineered a new strain of rice to produce higher annual grain yields, helping to address global food shortages.
Name the class of enzymes used to cut the desired gene from the donor DNA.
Name the enzyme used to join the gene into the DNA of the recipient rice's genome.
The average annual grain yield of a standard non-genetically engineered strain of this rice is 3.8 tonnes per hectare3.8\text{ tonnes per hectare}3.8 tonnes per hectare. The average annual grain yield of the genetically engineered strain, grown under identical environmental conditions, is 6.5 tonnes per hectare6.5\text{ tonnes per hectare}6.5 tonnes per hectare.
Calculate the percentage increase in grain yield caused by this genetic modification. Give your answer to 2 significant figures.
25 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.