6 Genetics, evolution and ecosystems

Practice questions on Genetics, evolution and ecosystems

• Describe the function of a repressor protein in the regulation of gene expression. (4 marks, Describe)
• The lac operon in E. coli is a well-studied example of gene regulation. Suggest how the la… (4 marks, Suggest)
• Explain how the regulation of gene expression at the transcriptional level contributes to … (4 marks, Explain)
• The lac operon in E. coli is a well-studied example of gene regulation. Describe the role … (4 marks, Describe)
• Explain why a mutation in the promoter region of a gene may result in a non-functional pro… (4 marks, Explain)
• A mutation in a structural gene results in a non-functional repressor protein. Explain how… (4 marks, Explain)
• A plant species can produce flowers that are either red, pink or white. A student crosses … (4 marks, Explain)
• A research team used CRISPR-Cas9 to introduce a loss-of-function mutation into a gene enco… (4 marks, Explain)
• A breed of cattle can display one of two coat colours: red or white. When a red bull is cr… (4 marks, Explain)
• A student crosses two true-breeding pea plants. One parent has purple flowers and the othe… (4 marks, Explain)
• A pharmaceutical company uses recombinant DNA technology to produce human insulin in bacte… (4 marks, Explain)
• Explain why a restriction endonuclease and DNA ligase are both required when inserting a h… (4 marks, Explain)
• Explain why a restriction endonuclease and DNA ligase are both required when inserting a h… (4 marks, Explain)
• Explain why totipotency in plant cells makes it possible to produce large numbers of genet… (4 marks, Explain)
• Explain why energy transfer between trophic levels in an ecosystem is never 100% efficient… (4 marks, Explain)
• Explain why energy transfer between trophic levels in an ecosystem is never 100% efficient… (4 marks, Explain)
• Explain why the removal of a top predator from an ecosystem can lead to a reduction in the… (4 marks, Explain)
• A woodland ecosystem is described as being in a climax community. Explain why the net prim… (4 marks, Explain)
• Explain why the size of a prey population in an ecosystem tends to fluctuate in a cyclical… (4 marks, Explain)
• Explain why the genetic diversity of a population of cheetahs is likely to be much lower t… (4 marks, Explain)