Chapter 20: Breeding and Biotechnology — Online MCQ Test
SCIENCE · CLASS 10th · Tamil Nadu State Board
Practice Chapter 20: Breeding and Biotechnology with a free chapter-wise online MCQ test.
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.
Chapter 20: Breeding and Biotechnology — Important Questions & Answers
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.
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.
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.
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.
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.
Recombinant DNA technology allows the transfer of specific genes from one species to another, which is how golden rice was developed.