Bihar Board Class 12 (Science) Biotechnology and its Applications — practice questions — page 2

Explore 32 free Biotechnology and its Applications questions in Bihar Board Class 12 (Science) Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Biotechnology and its Applications questions and exercises with answers

Showing questions 31–32 of 32.

Plant cells with their walls digested away yield what structures?Read the answer and worked solution →In what form does the Bt toxin exist inside the bacterium?Read the answer and worked solution →

Worked practice questions

Plant cells with their walls digested away yield what structures?

Naked protoplasts
Spheroplast walls
Dead cell ghosts
Cell plates

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Correct answer: A. Naked protoplasts

Digesting the cell wall leaves a cell surrounded only by its plasma membrane, called a naked protoplast.

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In what form does the Bt toxin exist inside the bacterium?

Active toxin
Bound to lipids
Free amino acids
Inactive protoxin

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Correct answer: D. Inactive protoxin

The toxin is stored as an inactive protoxin, which is why it does not kill the Bacillus itself.

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