Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Biotechnology and Its Applications question

2024 · Q53
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /NEET
  3. /Biology
  4. /Biotechnology and Its Applications
  5. /2024 · Q53

Biotechnology and Its Applications question

2024 · Q53

NEETBiologyBiotechnology and Its ApplicationsMCQ+4 / −1

Following are the steps involved in action of toxin in Bt. Cotton

A. The inactive toxin converted into active form due to alkaline pH of gut of insect.

B. Bacillus thuringiensis produce crystals with toxic insecticidal proteins.

C. The alkaline pH solubilises the crystals.

D. The activated toxin binds to the surface of midgut cells, creates pores and causes death of the insect.

E. The toxin proteins exist as inactive protoxins in bacteria.

Choose the correct sequence of steps from the options given below:

  1. A
    E→C→B→A→D\mathrm{E} \rightarrow \mathrm{C} \rightarrow \mathrm{B} \rightarrow \mathrm{A} \rightarrow \mathrm{D}E→C→B→A→D
  2. B
    B→C→A→E→D\mathrm{B} \rightarrow \mathrm{C} \rightarrow \mathrm{A} \rightarrow \mathrm{E} \rightarrow \mathrm{D}B→C→A→E→D
  3. C
    A→E→B→D→C\mathrm{A} \rightarrow \mathrm{E} \rightarrow \mathrm{B} \rightarrow \mathrm{D} \rightarrow \mathrm{C}A→E→B→D→C
  4. D
    B→E→C→A→D\mathrm{B} \rightarrow \mathrm{E} \rightarrow \mathrm{C} \rightarrow \mathrm{A} \rightarrow \mathrm{D}B→E→C→A→D
View written solutionFree

Correct answer: D

Option (D) is the correct answer because the correct sequence of action of toxin in Bt. cotton is

B. Bacillus thuringiensis produces crystals with toxic insecticidal proteins.

E. The toxin proteins exist as inactive protoxins in bacteria.

C. The alkaline pH solubilises the crystals.

A. The inactive toxin converted into active form due to alkaline pH of gut of insect.

D. The activated toxin binds to the surface of midgut cells, creates pores and causes death of the insect.

Hence, $$\mathrm{B} \rightarrow \mathrm{E} \rightarrow \mathrm{C} \rightarrow \mathrm{A} \rightarrow \mathrm{D}$$ is the correct order.

PreviousNext

More from Biotechnology and Its Applications

  • Which of the following statement is incorrect about Agrobacterium tumifaciens?2023 · MCQ
  • Which of the following can act as molecular scissors?2023 · MCQ
  • Match List-I with List-II. Choose the correct answer from the options given below : Includes table2023 · MCQ
  • In gene gun method used to introduce alien DNA into host cells, microparticles of ________ metal are used.2023 · MCQ
  • Main steps in the formation of Recombinant DNA are given below. Arrange these steps in a correct sequence. A. Insertion of recombinant DNA into the host cell B. Cutting of DNA at specific location by restriction enzyme C. Isolation of…2023 · MCQ
  • During the purification process for recombinant DNA technology, addition of chilled ethanol precipitates out2023 · MCQ
  • Milk of transgenic ‘Cow Rosie’ was nutritionally more balanced product for human babies than natural cow milk because it contained:2022 · MCQ
  • In the following palindromic base sequences of DNA, which one can be cut easily by particular restriction enzyme?2022 · MCQ