Chapter Exam

Unit 5 Chapter 12: Biotechnology and its Applications — Online MCQ Test

Q: What is the full form of Bt in Bt cotton?

Answer: A. Bacillus thuringiensis — Bt refers to the soil bacterium Bacillus thuringiensis. Its genes are used to provide insect resistance in crops like cotton.

Q: Which gene in Bt cotton provides resistance against bollworms?

Answer: A. cry gene — The cry genes from Bacillus thuringiensis code for insecticidal proteins that kill specific insect larvae such as bollworms.

Q: Bt cotton is genetically modified to resist attack by

Answer: C. bollworms — Bt cotton expresses Bt toxin that is effective mainly against bollworm larvae, which are major cotton pests.

Q: A farmer notices that a crop plant has been modified to resist insect damage without spraying chemical insecticides. Which biotechnology approach is most likely involved?

Answer: B. Insertion of Bt gene into the crop — Bt genes are inserted into crop plants to produce insecticidal proteins, reducing the need for chemical insecticides.

BOTANY · CLASS 12 INTERMEDIATE 2 YEAR · Telangana State Board

Practice Unit 5 Chapter 12: Biotechnology and its Applications with a free chapter-wise online MCQ test for Telangana State Board CLASS 12 INTERMEDIATE 2 YEAR BOTANY. This chapter covers: Focusing on practical biotechnological applications this chapter details transgenic plants pest-resistant crops Bt cotton RNA interference tissue culture applications ethical issue.... AI-generated questions from basic to board-exam level, with instant results and explanations.

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Unit 5 Chapter 12: Biotechnology and its Applications — Important Questions & Answers (FAQ)

Frequently asked questions from Telangana State Board CLASS 12 INTERMEDIATE 2 YEAR BOTANY — Unit 5 Chapter 12: Biotechnology and its Applications, with answers and explanations. These are sample questions; the exam has its own separate question set.

What is the full form of Bt in Bt cotton?

A. Bacillus thuringiensis ✓
B. Bacillus tumefaciens
C. Bio-transgenic
D. Biological toxin

Answer: A. Bacillus thuringiensis
Bt refers to the soil bacterium Bacillus thuringiensis. Its genes are used to provide insect resistance in crops like cotton.

Which gene in Bt cotton provides resistance against bollworms?

A. cry gene ✓
B. nif gene
C. vir gene
D. p53 gene

Answer: A. cry gene
The cry genes from Bacillus thuringiensis code for insecticidal proteins that kill specific insect larvae such as bollworms.

Bt cotton is genetically modified to resist attack by

A. fungi
B. virus
C. bollworms ✓
D. nematodes

Answer: C. bollworms
Bt cotton expresses Bt toxin that is effective mainly against bollworm larvae, which are major cotton pests.

A farmer notices that a crop plant has been modified to resist insect damage without spraying chemical insecticides. Which biotechnology approach is most likely involved?

A. Somatic hybridization
B. Insertion of Bt gene into the crop ✓
C. Removal of all chloroplasts
D. Use of only traditional cross-pollination

Answer: B. Insertion of Bt gene into the crop
Bt genes are inserted into crop plants to produce insecticidal proteins, reducing the need for chemical insecticides.

Which of the following is the best board-exam style reason for concern about bio-patents in biotechnology?

A. They always prevent any scientific research
B. They may restrict access to biological materials and traditional knowledge ✓
C. They are used only for animal breeding
D. They remove the need for regulations

Answer: B. They may restrict access to biological materials and traditional knowledge
Bio-patents can raise ethical concerns because they may limit access to biological resources, traditional knowledge, and affordable technology.

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