Home
Class 12
BIOLOGY
A protoxin is (A) A primitive toxin (B...

A protoxin is (A) A primitive toxin (B) A denatured toxin (C) Toxin produced by protozoa (D) Inactive toxin

A

A primitive toxin.

B

A denatured toxin

C

Toxin produced by protozoa

D

Inactive toxin

Text Solution

Verified by Experts

The correct Answer is:
A, C, D
Bt toxin is a protein. This toxin does not kill the Bacillus because the Bt toxin protein is inactive protein but once an insect ingests the inactive toxin, it is converted into an active form of toxin due to the alkaline pH of the gut which solubilise the crystals.
Promotional Banner

Topper's Solved these Questions

  • BIOTECHNOLOGY AND ITS APPLICATIONS

    KUMAR PRAKASHAN|Exercise Section - E (Solution of NCERT Examplar (Very Short Answer Type Questions))|17 Videos

  • BIOTECHNOLOGY AND ITS APPLICATIONS

    KUMAR PRAKASHAN|Exercise Section - E (Solution of NCERT Examplar (Short Answer Type Questions))|15 Videos

  • BIOTECHNOLOGY AND ITS APPLICATIONS

    KUMAR PRAKASHAN|Exercise Section-D (Textual Exercise )|10 Videos

  • BIOTECHNOLOGY : PRINCIPLES AND PROCESSES

    KUMAR PRAKASHAN|Exercise SECTION - F (MCQs ASKED IN COMPETITIVE EXAM)|78 Videos

  • BOARD QUESTION PAPER MARCH -2020

    KUMAR PRAKASHAN|Exercise Part-B (Section-C)|5 Videos

Similar Questions

Explore conceptually related problems

Bt toxin is

Crystals of Bt toxin produced by some bacteria do not kill the bacteria themselves because (A) Bacteria are resistant to toxin (B) Toxin is immature (C) Toxin is inactive (D) Bacteria encloses toxin in special sac

What is true about Bt toxin ? (A) Bt protein exists as active toxin in the Bacillus. (B) The activated toxin enters the ovaries of the pest to sterilize it and thus prevent its multiplication. (C) The concerned Bacillus has antitoxins. (D) The inactive protoxin gets converted into active form in the insect gut.

Many proteins are secreted in their inactive form. This is also true of many toxic proteins produced by microorganisms. Explain how the mechanism is useful for the organism producing the toxin ?

In Bt cotton, the Bt toxin present in the plant tissue as protoxin is converted into active toxin due to (A) Presence of conversion factors in insect gut (B) Alkaline pH of the insect gut (C) Acidic pH of the insect gut (D) Action of gut microorganisms

The trigger for activation of toxin of Bacillus thuringiensis is (A) Acidic pH of stomach (B) High temperature (C) Alkaline pH of gut (D) Mechanical action in the insect gut

If a,b are the position vectors of A,B respectively and C is a point on AB produced such that AC=3AB then the position vector of C is

What is true for all protozoans ? (A) are heterotrophs (B) they are either predators or parasites (C) hey are believed to be primitive relatives of animals (D) all of these

What triggers activation of protoxin to active Bt toxin of Bacillus thuringiensis in boll worm? (A) Body temperature (B) Moist surface of midgut (C) Alkaline pH of gut (D) Acidic pH of stomach