Bacillus thuringiensis producte endotoxin (Cry proteins) during the stationary phase of its growth cycle which when ingested and released in the gut of the larvae of insect pest, disrupts the insect gut lining thereby killing earthen. In this way, it act as a bioinsecticide. Related Theory Scientists identify and isolate the gene that produces the lethal protein. The gene is removed from the bacterium and a gene conferring resistance to a chemical (usually antibiotic or herbicide) is attached that will prove useful in a later step. The Bt gene with the resistance gene attached is inserted into plant cells. Any plant cell that has the Bt gene must also have the resistance gene that was attached to it. The plant cells are grown in the presence of the antibiotic or herbicide and select the plant cells that are unaffected by it. These genetically transformed plant cells are then grown into whole plants by a process called tissue culture. The modified plants produce the same lethal Bt protein produced by B bacteria because the plants now have the same gene.
Bacillus thuringiensis (Bt) strains have been used for designing novel:
NEET UG 2005 — Zoology Biotechnology and Its Applications
Bacillus thuringiensis (Bt) strains have been used for designing novel:
Held on 30 Apr 2005 · Verified 9 Jul 2026.
Options
- A
biofertilizers
- B
bio-metallurgical techniques
- C
bio-mineralization processes
- D
bioinsecticidal plants.
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More NEET UG Biotechnology and Its Applications questions
Which of the following genetically engineered organisms was used by Eli Lilly to prepare human insulin?
Given below are two statements : Statement I : Transfer RNAs and ribosomal RNA do not interact with mRNA. Statement II : RNA interference (RNAi) takes place in all eukaryotic organisms as a method of cellular defence. In the light of the above statements, choose the most appropriate answer from the options given below :
Silencing of specific mRNA is possible via RNAi because of
Match List I with List II :  Choose the correct answer form the options given below:
Match List-I with List-II : \begin{array}{llll} List-I & & List-II \\A.Genetically engineered Human Insulin & I. & Gene therapy \\B. GM Cotton & II.& E. coli \\C. ADA Deficiency & III.& Antigen-antibody interaction \\D. ELISA & IV. & Bacillus thuringiensis\end{array} Choose the correct answer from the options given below:
Other Zoology topics for NEET UG
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