What triggers activation of protoxins to active Bt toxin of Bacillus thuringinensis in boll worm?

  • Option 1)

    Body temperature

  • Option 2)

    Moist surface of midnight

  • Option 3)

    Alkaline pH of gut

  • Option 4)

    Acidic pH of stomach

Answers (2)

 

Bacillus Thuringiensis -

Bacillus Thuringiensis is a Gram-positive bacteria; During sporulation this bacteria  forms crystals of proteins or (cry protein), which are coded by cry genes (Cry 1 AC) Cry genes are used to make insecticide transgenic plants.

- wherein

When insects ingest crystal proteins , the alkaline pH of gut denature the insoluble protein into soluble. Soluble proteins makes gut porous and cause death of insect (Lepidopteran)

 

 

The toxins present in Bacillus thuringinesis remain as inactive protoxins which when enters gut of insect gets activated. The alkaline pH of insect gut activates the protoxin into active toxin.

The toxin then binds to specific receptors in the gut and causes the gut wall to breakdown. The insectidies as the bacteria proliferates.

 


Option 1)

Body temperature

Option 2)

Moist surface of midnight

Option 3)

Alkaline pH of gut

Option 4)

Acidic pH of stomach

Option 3)  Alkaline ph of gut

Preparation Products

Knockout NEET May 2023 (Easy Installments)

Personalized AI Tutor and Adaptive Time Table, Self Study Material, Weekend Live Classes, Mentorship from our Experts, Unlimited Mock Tests and Personalized Analysis Reports, 24x7 Doubt Chat Support,.

₹ 5499/-
Buy Now
Knockout NEET Aug 2021 (One Month)

Personalized AI Tutor and Adaptive Time Table, Self Study Material, Weekend Live Classes, Mentorship from our Experts, Unlimited Mock Tests and Personalized Analysis Reports, 24x7 Doubt Chat Support,.

₹ 14000/- ₹ 4999/-
Buy Now
Knockout NEET Aug 2021

Personalized AI Tutor and Adaptive Time Table, Self Study Material, Weekend Live Classes, Mentorship from our Experts, Unlimited Mock Tests and Personalized Analysis Reports, 24x7 Doubt Chat Support,.

₹ 22999/- ₹ 9999/-
Buy Now
Test Series NEET Aug 2021

Unlimited Chapter Wise Tests, Unlimited Subject Wise Tests, Unlimited Full Mock Tests, Get Personalized Performance Analysis Report,.

₹ 6999/- ₹ 2999/-
Buy Now
Rank Booster NEET 2021

Booster and Kadha Video Lectures, Unlimited Full Mock Test, Adaptive Time Table, 24x7 Doubt Chat Support,.

₹ 13999/- ₹ 6999/-
Buy Now
Boost your Preparation for NEET 2021 with Personlized Coaching
 
Exams
Articles
Questions