Download App

Biotechnology and its Applications — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYBiotechnology and its Applications3 Marks
Question
  1. Which insects are killed by Bacillus thuringiensis?
  2. The Bt binds to which cells?
  3. In which plants Bt toxin is used?
✓

Answer

  1. The activated toxin binds to the surface of midgut epithelial cells and creates pores that cause cell swelling and lysis leading to the death of an insect.
  2. Bacillus thuringiensis forms protein crystals (Cry) during a particular phase of their growth. These crystals contain a toxic insecticidal protein.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "3 Marks Question" from Biotechnology and its Applications→Biotechnology and its Applications — all question types→BIOLOGY STD 12 Science question papers→Rajasthan Board STD 12 Science question papers→Rajasthan Board question paper generator→

Similar questions

What is Vasectomy? Represent it diagrammatically.
→
What is the pathogenic property of baculoviruses used as a biocontrol agent? Name the genus of these organisms.
→
The generative cell of a 2-celled pollen divides in the pollen tube but not in a 3-celled pollen. Give reasons.
→
  1. Name the kind of diseases/ disorders that are likely to occur in humans if
    1. Mutation in the gene that codes for an enzyme phenyl alanine hydrolase occurs,
    2. There is an extra copy of chromosome 21,
    3. The karyotype is XXY.
  2. Mention any one symptom of the diseases/ disorders named above.
→
How is biodiversity important for ecosystem functioning?
→
Organisms at a higher trophic level have less energy available. Comment.
→
How does the sperm penetrate through the zona pellucida in human ovum?
→
  1. Name any two places where it is essential to install electrostatic precipitators. Why it is required to do so?
  2. Mention one limitation of the electrostatic precipitator.
→
How is a cancerous cell different from normal cell?
→
What is an endangered species? Give an example of an endangered plant and animal species each?
→