Biotechnology and Genetic Modification

Worked examples (12)extended set

• 1Identifying the plasmid on a bacterial cell (multiple choice)
• 2Which features make bacteria useful? (multiple choice)
• 3Completing sentences about why bacteria are used
• 4Describing a bacterial growth curve with data
• 5Choosing an organism to make a human protein
• 6Biotechnology, genetic modification or both?
• 7Matching the stages of making a protein to features of bacteria
• 8Describing a plasmid (multiple choice)
• 9Percentage increase in insulin made by bacteria
• 10A safe investigation of bacterial growth
• 11Making a cheese-making enzyme with bacteria
• 12How long to grow a million modified bacteria?

Model answers (6)

• ✓Model answer — Paper 4 short-answer style
• ✓Model answer — Paper 4 short-answer style
• ✓Model answer — Paper 4 structured style
• ✓Model answer — Paper 4 (Extended) structured style
• ✓Model answer — Paper 4 (Extended) structured style
• ✓Model answer — Paper 4 (Extended) extended-response style

Worked examples (12)extended set

• 1The enzyme that removes a grease stain (multiple choice)
• 2Yeast and anaerobic respiration in bread-making
• 3Reading a dough-rising experiment into a results table
• 4Yeast and ethanol for biofuel
• 5Pectinase and the volume of fruit juice
• 6Biological washing powder and temperature
• 7Lactase and lactose-free milk
• 8Labelling an industrial fermenter
• 9Controlling the conditions in a fermenter
• 10Which organism makes each product? (multiple choice)
• 11What happens when a fermenter's cooling fails
• 12Planning a yeast and sugar investigation

Model answers (6)

• ✓Model answer — Paper 4 short-answer style
• ✓Model answer — Paper 4 short-answer style
• ✓Model answer — Paper 4 structured style
• ✓Model answer — Paper 4 (Extended) structured style
• ✓Model answer — Paper 4 (Extended) structured style
• ✓Model answer — Paper 4 (Extended) extended-response style

Worked examples (12)extended set

• 1What counts as genetic modification?
• 2Recognising an example of genetic modification (multiple choice)
• 3Completing sentences on sticky ends and ligase
• 4Sticky ends on a DNA diagram
• 5The two enzymes of genetic modification (multiple choice)
• 6Ordering the steps (multiple choice)
• 7Outlining how bacteria are made to produce a human hormone
• 8Percentage increase in GM soya grown
• 9Insect-resistant maize: yield data
• 10Testing GM rice before farmers grow it
• 11Should farmers grow herbicide-resistant soya?
• 12Choosing the right restriction enzyme

Model answers (6)

• ✓Model answer — Paper 4 short-answer style
• ✓Model answer — Paper 4 short-answer style
• ✓Model answer — Paper 4 structured style
• ✓Model answer — Paper 4 (Extended) structured style
• ✓Model answer — Paper 4 (Extended) structured style
• ✓Model answer — Paper 4 (Extended) extended-response style