Biotechnology and genetic modification — Paper 2 · IGCSE Biology (9-1) 0970

38 All organisms share the same genetic code. This means that bacteria can be used to A improve the health of the digestive system. B manufacture biofuels in large quantities. C produce foods such as yoghurt and cheese. D make proteins using human DNA.

1 marks

Answer: D

This question in 0970/22 May/June 2019

37 What is the role of anaerobic respiration in bread-making? A to produce alcohol to flavour the bread B to produce gas to make the bread rise C to release enough energy to bake the bread D to release enough lactic acid to kill the yeast

1 marks

Answer: B

This question in 0970/22 May/June 2020

39 Which is a reason for using bacteria in biotechnology? A Bacteria are found inside the human body. B Bacteria do not become resistant to antibiotics. C Bacteria can make complex molecules. D Bacteria reproduce slowly.

1 marks

Answer: C

This question in 0970/22 May/June 2020

36 New strains of the crop plant wheat can be produced by cross-breeding disease resistant plants with those that give high yields of grain. What is this an example of? A natural selection B artificial selection C genetic engineering D asexual reproduction

1 marks

Answer: B

This question in 0970/21 May/June 2021

39 Why are bacteria useful in genetic engineering? A Their genetic code is different to other organisms. B They have cell walls. C They have plasmids. D They reproduce sexually.

1 marks

Answer: C

This question in 0970/21 May/June 2021

37 What is a characteristic of bacteria that makes them useful in genetic engineering? A The genetic code of bacteria is different to plants and animals. B Their nucleus contains DNA. C Plasmids can be transferred between cells. D They have large numbers of mitochondria.

1 marks

Answer: C

This question in 0970/22 Oct/Nov 2021

38 Which process makes use of a genetically engineered organism? A using bacteria to produce insulin B using enzymes in biological washing powders C using pectinase in fruit juice production D using yeast to produce ethanol

1 marks

Answer: A

This question in 0970/21 May/June 2022

38 Which process makes use of a genetically engineered organism? A using bacteria to produce insulin B using enzymes in biological washing powders C using pectinase in fruit juice production D using yeast to produce ethanol

1 marks

Answer: A

This question in 0970/22 May/June 2022

39 The diagram shows a bacterial cell containing a plasmid. plasmid What is inserted into the plasmid if this cell is to be used for the production of insulin? A a length of DNA from a human B a length of DNA from another bacterium C a molecule of insulin D an enzyme

1 marks

Answer: A

This question in 0970/22 May/June 2023

40 Some of the processes involved in the production of insulin by genetic modification are listed. 1 cutting of bacterial plasmid DNA with restriction enzymes 2 expression in bacteria of the human gene to make insulin 3 insertion of recombinant plasmids into bacteria 4 multiplication of bacteria containing recombinant plasmids In which order do these processes occur? A 1  3  4  2 B 2  1  3  4 C 3  1  2  4 D 4  1  3  2

1 marks

Answer: A

This question in 0970/21 May/June 2025

40 Which features make bacteria useful in biotechnology? 1 They are unaffected by antibiotics. 2 They do not contain plasmids. 3 They make complex molecules. 4 They reproduce rapidly. A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4

1 marks

Answer: D

This question in 0970/22 May/June 2025