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The Bt toxin is not toxic to human beings because
- a)the pro Bt toxin activation requires temperature above human body temperature
- b)the Bt toxin recognises only insect-specific targets
- c)the pro Bt toxin activation requires pH lower than that present in human stomach
- d)conversion of pro Bt toxin to Bt toxin takes place in highly alkaline conditions
Correct answer is option 'D'. Can you explain this answer?
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The Bt toxin is not toxic to human beings becausea)the pro Bt toxin ac...
Conversion of pro Bt toxin to Bt toxin takes place in highly alkaline conditions which are not present in human stomach. Human stomach is acidic in nature.
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The Bt toxin is not toxic to human beings becausea)the pro Bt toxin ac...
Why Bt toxin is not toxic to human beings?
Conversion of Pro Bt toxin to Bt toxin
- The Bt toxin is produced as an inactive pro Bt toxin in the Bacillus thuringiensis bacteria.
- The pro Bt toxin needs to be converted to the active Bt toxin to exhibit its insecticidal properties.
- This conversion takes place in the gut of the target insect when the pro Bt toxin interacts with the alkaline pH (pH 9-10) of the insect gut.
Highly Alkaline Conditions
- The conversion of pro Bt toxin to Bt toxin takes place in highly alkaline conditions.
- The alkaline pH of the insect gut is necessary for the activation of the Bt toxin.
- However, the pH of the human stomach is acidic (pH 1.5-3.5) which prevents the conversion of pro Bt toxin to Bt toxin.
Insect-specific Targets
- The Bt toxin is specific to insect targets.
- It binds to the specific receptors present only in the gut of the target insect.
- Human beings lack these specific receptors, and therefore, the Bt toxin does not bind to the cells of the human body.
Conclusion
- Thus, the Bt toxin is not toxic to human beings because the conversion of the pro Bt toxin to Bt toxin takes place in highly alkaline conditions, which are absent in the human stomach.
- Additionally, the Bt toxin recognises only insect-specific targets, and therefore, does not affect human cells.
Conversion of Pro Bt toxin to Bt toxin
- The Bt toxin is produced as an inactive pro Bt toxin in the Bacillus thuringiensis bacteria.
- The pro Bt toxin needs to be converted to the active Bt toxin to exhibit its insecticidal properties.
- This conversion takes place in the gut of the target insect when the pro Bt toxin interacts with the alkaline pH (pH 9-10) of the insect gut.
Highly Alkaline Conditions
- The conversion of pro Bt toxin to Bt toxin takes place in highly alkaline conditions.
- The alkaline pH of the insect gut is necessary for the activation of the Bt toxin.
- However, the pH of the human stomach is acidic (pH 1.5-3.5) which prevents the conversion of pro Bt toxin to Bt toxin.
Insect-specific Targets
- The Bt toxin is specific to insect targets.
- It binds to the specific receptors present only in the gut of the target insect.
- Human beings lack these specific receptors, and therefore, the Bt toxin does not bind to the cells of the human body.
Conclusion
- Thus, the Bt toxin is not toxic to human beings because the conversion of the pro Bt toxin to Bt toxin takes place in highly alkaline conditions, which are absent in the human stomach.
- Additionally, the Bt toxin recognises only insect-specific targets, and therefore, does not affect human cells.
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The Bt toxin is not toxic to human beings becausea)the pro Bt toxin activation requires temperature above human body temperatureb)the Bt toxin recognises only insect-specific targetsc)the pro Bt toxin activation requires pH lower than that present in human stomachd)conversion of pro Bt toxin to Bt toxin takes place in highly alkaline conditionsCorrect answer is option 'D'. Can you explain this answer?
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The Bt toxin is not toxic to human beings becausea)the pro Bt toxin activation requires temperature above human body temperatureb)the Bt toxin recognises only insect-specific targetsc)the pro Bt toxin activation requires pH lower than that present in human stomachd)conversion of pro Bt toxin to Bt toxin takes place in highly alkaline conditionsCorrect answer is option 'D'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about The Bt toxin is not toxic to human beings becausea)the pro Bt toxin activation requires temperature above human body temperatureb)the Bt toxin recognises only insect-specific targetsc)the pro Bt toxin activation requires pH lower than that present in human stomachd)conversion of pro Bt toxin to Bt toxin takes place in highly alkaline conditionsCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The Bt toxin is not toxic to human beings becausea)the pro Bt toxin activation requires temperature above human body temperatureb)the Bt toxin recognises only insect-specific targetsc)the pro Bt toxin activation requires pH lower than that present in human stomachd)conversion of pro Bt toxin to Bt toxin takes place in highly alkaline conditionsCorrect answer is option 'D'. Can you explain this answer?.
The Bt toxin is not toxic to human beings becausea)the pro Bt toxin activation requires temperature above human body temperatureb)the Bt toxin recognises only insect-specific targetsc)the pro Bt toxin activation requires pH lower than that present in human stomachd)conversion of pro Bt toxin to Bt toxin takes place in highly alkaline conditionsCorrect answer is option 'D'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about The Bt toxin is not toxic to human beings becausea)the pro Bt toxin activation requires temperature above human body temperatureb)the Bt toxin recognises only insect-specific targetsc)the pro Bt toxin activation requires pH lower than that present in human stomachd)conversion of pro Bt toxin to Bt toxin takes place in highly alkaline conditionsCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The Bt toxin is not toxic to human beings becausea)the pro Bt toxin activation requires temperature above human body temperatureb)the Bt toxin recognises only insect-specific targetsc)the pro Bt toxin activation requires pH lower than that present in human stomachd)conversion of pro Bt toxin to Bt toxin takes place in highly alkaline conditionsCorrect answer is option 'D'. Can you explain this answer?.
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The Bt toxin is not toxic to human beings becausea)the pro Bt toxin activation requires temperature above human body temperatureb)the Bt toxin recognises only insect-specific targetsc)the pro Bt toxin activation requires pH lower than that present in human stomachd)conversion of pro Bt toxin to Bt toxin takes place in highly alkaline conditionsCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for The Bt toxin is not toxic to human beings becausea)the pro Bt toxin activation requires temperature above human body temperatureb)the Bt toxin recognises only insect-specific targetsc)the pro Bt toxin activation requires pH lower than that present in human stomachd)conversion of pro Bt toxin to Bt toxin takes place in highly alkaline conditionsCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of The Bt toxin is not toxic to human beings becausea)the pro Bt toxin activation requires temperature above human body temperatureb)the Bt toxin recognises only insect-specific targetsc)the pro Bt toxin activation requires pH lower than that present in human stomachd)conversion of pro Bt toxin to Bt toxin takes place in highly alkaline conditionsCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
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