Biology (9-1) - 0970 CIE

Genetic Modification (continued)

Muhtasari

Genetic modification is not just for medicine. By inserting chosen genes into crop plants, scientists have made maize that fights off insects, soya that survives weedkillers, and rice that carries extra vitamin A to prevent childhood blindness. The promise is huge, but so is the controversy.

In this lesson you will outline the main uses of genetic modification, from human proteins in bacteria to herbicide-resistant, pest-resistant and more nutritious crops, and then (for [Supplement]) weigh the advantages and disadvantages of GM crops such as soya, maize and rice, reaching a balanced judgement of your own.

Malengo

  1. Outline examples of genetic modification: (a) the insertion of human genes into bacteria to produce human proteins (b) the insertion of genes into crop plants to confer resistance to herbicides (c) the insertion of genes into crop plants to confer resistance to insect pests (d) the insertion of genes into crop plants to improve nutritional qualities
  2. [Supplement] Discuss the advantages and disadvantages of genetically modifying crops, including soya, maize and rice

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Maelezo ya Somo

GM crops could help feed a growing world and cut chemical use, yet they raise real concerns about ecology, ethics and who benefits. Examiners ask you both to list the applications and to discuss them, so you need the examples and a balanced argument with a judgement.

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Tathmini ya Somo

Hongera kwa kukamilisha somo la Genetic Modification (continued). Sasa kwa kuwa umechunguza dhana na mawazo muhimu, ni wakati wa kuweka ujuzi wako kwa mtihani. Sehemu hii inatoa mazoezi mbalimbali maswali yaliyoundwa ili kuimarisha uelewaji wako na kukusaidia kupima ufahamu wako wa nyenzo.

Utakutana na mchanganyiko wa aina mbalimbali za maswali, ikiwemo maswali ya kuchagua jibu sahihi, maswali ya majibu mafupi, na maswali ya insha. Kila swali limebuniwa kwa umakini ili kupima vipengele tofauti vya maarifa yako na ujuzi wa kufikiri kwa makini.

Tumia sehemu hii ya tathmini kama fursa ya kuimarisha uelewa wako wa mada na kubaini maeneo yoyote ambapo unaweza kuhitaji kusoma zaidi. Usikatishwe tamaa na changamoto zozote utakazokutana nazo; badala yake, zitazame kama fursa za kukua na kuboresha.

  1. Inserting a gene so a crop makes its own insect toxin gives the crop: A. herbicide resistance B. insect-pest resistance C. drought resistance D. extra vitamin A Answer: B
  2. Golden rice has been genetically modified to contain more: A. protein B. vitamin A C. iron D. sugar Answer: B
  3. A herbicide-resistant GM crop allows farmers to: A. spray weedkiller without harming the crop B. stop watering the crop C. avoid harvesting D. remove all insects Answer: A
  4. [Supplement] A major ecological concern about GM crops is that: A. they cannot reproduce B. modified genes could spread to wild plants C. they need no soil D. they grow too slowly Answer: B
  5. [Supplement] An advantage of GM over conventional cross-breeding is that: A. the whole genome is transferred B. only the wanted gene is transferred C. it is always cheaper D. no genes are changed Answer: B

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Vitabu Vinavyopendekezwa

Cambridge IGCSE Biology Coursebook
Cambridge IGCSE Biology Coursebook
Manukuu: Fifth edition
Mchapishaji: Cambridge University Press
Mwaka: 2021
ISBN: 978-1-108-74880-2
Maelezo: Endorsed coursebook with full coverage of the 0610/0970 syllabus, practical investigations and exam-style questions.
Cambridge IGCSE Biology
Cambridge IGCSE Biology
Manukuu: Fourth edition
Mchapishaji: Hodder Education
Mwaka: 2021
ISBN: 978-1-5104-7864-0
Maelezo: Endorsed textbook covering the Core and Supplement content with clear biological diagrams and questions.

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Ungependa kufanya mazoezi ya maswali ya majaribio kuhusu Genetic Modification (continued)? Pakua programu ya Green Bridge CBT ili kupata maswali ya majaribio na tathmini kamili za mazoezi kuhusu mada hii.

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