Explain the use of lactase to produce lactosefree milk
Explain the use of lactase to produce lactosefree milk
1 Answer
Questions and Answers For
IGCSE Biology
322 Questions
1 Answer Investigate and describe the use of biological washing powders that contain enzymes
Investigate and describe the use of biological washing powders that contain enzymes
1 Answer Describe the use of pectinase in fruit juice production
Describe the use of pectinase in fruit juice production
1 Answer Describe the role of anaerobic respiration in yeast during bread-making
Describe the role of anaerobic respiration in yeast during bread-making
1 Answer Describe the role of anaerobic respiration in yeast during the production of ethanol for biofuels
Describe the role of anaerobic respiration in yeast during the production of ethanol for biofuels
1 Answer Discuss why bacteria are useful in biotechnology and genetic modification, limited to: (a) few ethical concerns over their manipulation and growth (b) the presence of plasmids
Discuss why bacteria are useful in biotechnology and genetic modification, limited to: (a) few ethical concerns over their manipulation and growth (b) the presence of plasmids
1 Answer State that bacteria are useful in biotechnology and genetic modification due to their rapid reproduction rate and their ability to make complex molecules
State that bacteria are useful in biotechnology and genetic modification due to their rapid reproduction rate and their ability to make complex molecules
1 Answer Explain the risks to a species if its population size decreases, reducing genetic variation (knowledge of genetic drift is not required)
Explain the risks to a species if its population size decreases, reducing genetic variation (knowledge of genetic drift is not required)
1 Answer Describe the use of artificial insemination (AI) and in vitro fertilisation (IVF) in captive breeding programmes
Describe the use of artificial insemination (AI) and in vitro fertilisation (IVF) in captive breeding programmes
1 Answer Describe the reasons for conservation programmes, limited to: (a) maintaining or increasing biodiversity (b) reducing extinction (c) protecting vulnerable ecosystems (d) maintaining ecosystem functions, limited to nutrient cycling and resource provision, including food, drugs, fuel and genes
Describe the reasons for conservation programmes, limited to: (a) maintaining or increasing biodiversity (b) reducing extinction (c) protecting vulnerable ecosystems (d) maintaining ecosystem functions, limited to nutrient cycling and resource provision, including food, drugs, fuel and genes
1 Answer
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drifting movement in fishes during migration
Drifting movement is a significant aspect of fish migration, particularly
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Topoisomerase: – A. Separates the DNA strands at the origin – B. Keeps the single-stranded DNA regions from coming back together – C. Re-coils the DNA into a helix after replication is complete – D. Breaks DNA backbone to remove tension produced by the helicase – E. Breaks hydrogen bonds between DNA and the RNA primers
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