Chapter Exam

Chapter 20: Breeding and Biotechnology — Online MCQ Test

Q: Which of the following is a technique used to grow plant cells in a nutrient medium?

Answer: A. Tissue culture — Tissue culture is the technique of growing plant cells or tissues in a sterile, artificial nutrient medium.

Q: What is the primary goal of plant breeding?

Answer: B. To improve crop varieties — Plant breeding aims to develop new and improved plant varieties with desirable traits like high yield and disease resistance.

Q: In animal breeding, which process involves mating individuals of the same breed with no common ancestors for 4-6 generations?

Answer: B. Outcrossing — Outcrossing is the mating of animals within the same breed that do not have common ancestors.

Q: If a scientist wants to combine two different varieties of wheat to gain the best traits of both, which method would they choose?

Answer: B. Cross-breeding — Cross-breeding is specifically used to combine the desirable traits of two different varieties/breeds into one offspring.

Q: If a researcher observes that a specific gene for vitamin A production is missing in a local variety of rice, but present in a wild species, which step is required to create 'Golden Rice'?

Answer: B. Recombinant DNA insertion of the specific gene — Recombinant DNA technology allows the transfer of specific genes from one species to another, which is how golden rice was developed.

SCIENCE · CLASS 10th · Tamil Nadu State Board

Practice Chapter 20: Breeding and Biotechnology with a free chapter-wise online MCQ test for Tamil Nadu State Board CLASS 10th SCIENCE. This chapter covers: Focusing on applied biology this chapter details plant breeding animal breeding genetic engineering recombinant DNA technology and stem cell research. Students study tissue culture.... AI-generated questions from basic to board-exam level, with instant results and explanations.

Questions

20m

Time Limit

Attempts Left

10 random questions from this chapter (mixed difficulty)
Questions you've seen before won't repeat until the pool resets
You have 20 minutes — exam auto-submits when time is up
Maximum 3 attempts per chapter
Results and explanations shown immediately after submission

New here? Register free — includes 3 free chapter exams.

Chapter 20: Breeding and Biotechnology — Important Questions & Answers (FAQ)

Frequently asked questions from Tamil Nadu State Board CLASS 10th SCIENCE — Chapter 20: Breeding and Biotechnology, with answers and explanations. These are sample questions; the exam has its own separate question set.

Which of the following is a technique used to grow plant cells in a nutrient medium?

A. Tissue culture ✓
B. Hydroponics
C. Genetic mapping
D. Animal breeding

Answer: A. Tissue culture
Tissue culture is the technique of growing plant cells or tissues in a sterile, artificial nutrient medium.

What is the primary goal of plant breeding?

A. To decrease crop yield
B. To improve crop varieties ✓
C. To reduce genetic diversity
D. To increase pest susceptibility

Answer: B. To improve crop varieties
Plant breeding aims to develop new and improved plant varieties with desirable traits like high yield and disease resistance.

In animal breeding, which process involves mating individuals of the same breed with no common ancestors for 4-6 generations?

A. Inbreeding
B. Outcrossing ✓
C. Cross-breeding
D. Interspecific hybridization

Answer: B. Outcrossing
Outcrossing is the mating of animals within the same breed that do not have common ancestors.

If a scientist wants to combine two different varieties of wheat to gain the best traits of both, which method would they choose?

A. Mutation breeding
B. Cross-breeding ✓
C. Self-pollination
D. Tissue culture propagation

Answer: B. Cross-breeding
Cross-breeding is specifically used to combine the desirable traits of two different varieties/breeds into one offspring.

If a researcher observes that a specific gene for vitamin A production is missing in a local variety of rice, but present in a wild species, which step is required to create 'Golden Rice'?

A. Selection of naturally occurring vitamin-rich rice
B. Recombinant DNA insertion of the specific gene ✓
C. Forced cross-pollination between wild and local rice
D. Exposure of seeds to radiation for mutation

Answer: B. Recombinant DNA insertion of the specific gene
Recombinant DNA technology allows the transfer of specific genes from one species to another, which is how golden rice was developed.