GS PrelimsScience and TechnologyBiotechnology2011

A genetically engineered form of brinjal, known as the Bt-brinjal, has been developed. The objective of this is

A

To make it pest-resistant

B

To improve its taste and nutritive qualities

C

To make it drought-resistant

D

To make its shelf-life longer

Correct Answer: Option A

Explanation

1. Bt-brinjal is a genetically engineered variety of brinjal (eggplant). 2. The 'Bt' stands for Bacillus thuringiensis, a bacterium that produces insecticidal proteins. 3. A gene from this bacterium is inserted into the brinjal's genome, enabling the plant to produce its own insecticidal protein. 4. The primary objective of developing Bt-brinjal is to make it pest-resistant, specifically against the fruit and shoot borer insect, which is a major pest for brinjal crops. 5. Options (B), (C), and (D) are incorrect; while genetic engineering can potentially target traits like taste, nutritive qualities, drought resistance, or shelf-life, the specific purpose of Bt technology in this context is insect pest resistance.

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