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Which one of the following statements is correct? 1)Bt toxin gene has been cloned from the bacteria 2)Bt toxin is coded by a gene named cry 3)Bacillus thuringiensis forms protein crystal throughout their life cycle 4)Bt toxin protein exists as inactive protoxin?
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Which one of the following statements is correct? 1)Bt toxin gene has ...
Understanding Bt Toxin and Its Characteristics
The question revolves around the characteristics of the Bt toxin gene and its properties. Let's analyze the statements provided:
1. Bt Toxin Gene Cloning
- The Bt toxin gene has indeed been cloned from the bacterium Bacillus thuringiensis, which is a significant achievement in biotechnology.
2. Cry Gene
- The Bt toxin is coded by a gene known as cry (crystal), which produces the crystal protein that is toxic to certain pests. This statement is correct.
3. Protein Crystal Formation
- Bacillus thuringiensis does not form protein crystals throughout its entire life cycle. Instead, these crystals are produced during the sporulation phase when the bacteria are under stress. Thus, this statement is incorrect.
4. Inactive Protoxin
- Bt toxin is initially produced as an inactive protoxin. This protoxin becomes activated in the alkaline environment of the insect's gut, where it binds to specific receptors, leading to insect mortality. This statement is correct.
Conclusion
- The correct statements from the options provided are that the Bt toxin gene has been cloned from the bacteria, it is coded by the cry gene, and that the Bt toxin exists as an inactive protoxin. The incorrect statement is regarding the formation of protein crystals throughout the life cycle of Bacillus thuringiensis.
In summary, the most accurate responses are that the Bt toxin is coded by the cry gene and that it exists as an inactive protoxin.
The question revolves around the characteristics of the Bt toxin gene and its properties. Let's analyze the statements provided:
1. Bt Toxin Gene Cloning
- The Bt toxin gene has indeed been cloned from the bacterium Bacillus thuringiensis, which is a significant achievement in biotechnology.
2. Cry Gene
- The Bt toxin is coded by a gene known as cry (crystal), which produces the crystal protein that is toxic to certain pests. This statement is correct.
3. Protein Crystal Formation
- Bacillus thuringiensis does not form protein crystals throughout its entire life cycle. Instead, these crystals are produced during the sporulation phase when the bacteria are under stress. Thus, this statement is incorrect.
4. Inactive Protoxin
- Bt toxin is initially produced as an inactive protoxin. This protoxin becomes activated in the alkaline environment of the insect's gut, where it binds to specific receptors, leading to insect mortality. This statement is correct.
Conclusion
- The correct statements from the options provided are that the Bt toxin gene has been cloned from the bacteria, it is coded by the cry gene, and that the Bt toxin exists as an inactive protoxin. The incorrect statement is regarding the formation of protein crystals throughout the life cycle of Bacillus thuringiensis.
In summary, the most accurate responses are that the Bt toxin is coded by the cry gene and that it exists as an inactive protoxin.
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Which one of the following statements is correct? 1)Bt toxin gene has been cloned from the bacteria 2)Bt toxin is coded by a gene named cry 3)Bacillus thuringiensis forms protein crystal throughout their life cycle 4)Bt toxin protein exists as inactive protoxin?
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Which one of the following statements is correct? 1)Bt toxin gene has been cloned from the bacteria 2)Bt toxin is coded by a gene named cry 3)Bacillus thuringiensis forms protein crystal throughout their life cycle 4)Bt toxin protein exists as inactive protoxin? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Which one of the following statements is correct? 1)Bt toxin gene has been cloned from the bacteria 2)Bt toxin is coded by a gene named cry 3)Bacillus thuringiensis forms protein crystal throughout their life cycle 4)Bt toxin protein exists as inactive protoxin? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which one of the following statements is correct? 1)Bt toxin gene has been cloned from the bacteria 2)Bt toxin is coded by a gene named cry 3)Bacillus thuringiensis forms protein crystal throughout their life cycle 4)Bt toxin protein exists as inactive protoxin?.
Which one of the following statements is correct? 1)Bt toxin gene has been cloned from the bacteria 2)Bt toxin is coded by a gene named cry 3)Bacillus thuringiensis forms protein crystal throughout their life cycle 4)Bt toxin protein exists as inactive protoxin? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Which one of the following statements is correct? 1)Bt toxin gene has been cloned from the bacteria 2)Bt toxin is coded by a gene named cry 3)Bacillus thuringiensis forms protein crystal throughout their life cycle 4)Bt toxin protein exists as inactive protoxin? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which one of the following statements is correct? 1)Bt toxin gene has been cloned from the bacteria 2)Bt toxin is coded by a gene named cry 3)Bacillus thuringiensis forms protein crystal throughout their life cycle 4)Bt toxin protein exists as inactive protoxin?.
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