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Q121 (IAS/2000) Science & Technology › Biotechnology & Health › Genetically modified crops Answer Verified

Insect-resistant cotton plants have been genetically engineered by inserting a gene from a/an

Result
Your answer: —  Â·  Correct: B
Explanation

Transgenic insect‑resistant cotton (Bt cotton) was created by inserting a bacterial toxin gene—the Cry family (for example Cry1Ac)—into cotton so the plant produces an insecticidal protein. In India, Bt cotton hybrids carrying the Cry1Ac gene were approved for commercial cultivation from the 2002 crop season following trials and adoption across several states [1]. The Cry toxin genes are isolated from the soil bacterium Bacillus thuringiensis (Bt) and then incorporated into plant genomes; plants expressing these Bt Cry proteins kill susceptible caterpillar pests when ingested [2]. Therefore the insect‑resistance gene source is a bacterium, not a virus, insect, or plant.

Sources

  1. [1] Environment and Ecology, Majid Hussain (Access publishing 3rd ed.) > Chapter 12: Major Crops and Cropping Patterns in India > Bt. Cotton in India > p. 40
  2. [2] https://www.entsoc.org/sites/default/files/files/Science-Policy/2018/ESA-Factsheet-Bt.pdf
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SIMILAR QUESTIONS

IAS · 1999 · Q129 Relevance score: 6.46

Assertion (A) : Insect resistant transgenic cotton has been produced by inserting Bt gene. Reason (R) : The Bt gene is derived from a bacterium.

IAS · 2001 · Q130 Relevance score: 4.13

The American multinational company, Monsanto has produced an insect-resistant cotton variety that is undergoing field- trails in India. A toxin gene from which ONE of the following bacteria has been transferred to this transgenic cotton ?

CDS-I · 2022 · Q14 Relevance score: 0.28

Which one of the following statements is not correct with regard to genetically modified organisms ?

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IAS · 2011 · Q29 Relevance score: -2.53

A genetically engineered form of brinjal, known as the Bt-brinjal, has been developed. The objective of this is