Question
What is biofortification? Give two examples of biofortified crops and explain why they are significant.
This is a direct 2-3 mark question from NEET 2024 and appears almost every year in CBSE Class 12 boards. Straightforward concept, but students often confuse it with genetic modification.
Solution — Step by Step
Biofortification is the process of breeding crops to have higher levels of vitamins, minerals, or proteins than their conventional counterparts. The key word is breeding — this includes conventional plant breeding, not necessarily genetic engineering (though that’s one method).
Why do we need biofortification? Normal crops grown in nutrient-poor soil or selected only for yield often lack adequate micronutrients. Biofortification directly targets the genetic composition of the crop so the nutrient content is higher regardless of soil conditions.
Golden Rice is developed by inserting genes for beta-carotene biosynthesis into rice. The body converts beta-carotene into Vitamin A. This was created to address Vitamin A Deficiency (VAD), which causes blindness in millions of children globally — particularly relevant in South and Southeast Asia where rice is the staple crop.
IARI (Indian Agricultural Research Institute) has developed wheat varieties with higher protein and iron content, and maize hybrids enriched with amino acids lysine and tryptophan. These address protein malnutrition, a major concern in vegetarian-heavy Indian diets. This is specifically mentioned in NCERT and commonly asked in boards.
Biofortification is a cost-effective, sustainable approach to address hidden hunger — micronutrient deficiency in populations that get enough calories but lack essential nutrients.
Why This Works
The concept sits at the intersection of agriculture and public health. When a population eats the same staple crop daily (rice, wheat, maize), enriching that crop is far more practical than distributing supplements or changing dietary habits.
Conventional breeding selects parent plants naturally high in a nutrient and crosses them over generations. Genetic engineering (like Golden Rice) directly inserts the biosynthesis pathway. Both count as biofortification — the goal is the same, the method differs.
From an exam perspective, NEET tests whether you know the purpose (addressing malnutrition/hidden hunger) and specific examples with the nutrient they address. Vague answers like “it improves crop quality” will not fetch full marks.
Alternative Method (Exam Answer Framework)
For a 3-mark question, use this structure:
1 mark — Definition: Breeding crops for enhanced nutritional quality (vitamins, minerals, proteins).
1 mark — Example 1: Golden Rice → beta-carotene → Vitamin A deficiency.
1 mark — Example 2: Iron-fortified wheat / lysine-tryptophan maize (IARI varieties) → protein/mineral deficiency.
NCERT Class 12 Biology Chapter 9 lists specific IARI examples: wheat and rice varieties with higher protein, lysine, and iron; maize hybrids with tryptophan and lysine. Memorise at least two with the specific nutrient — NEET rewards specificity.
Common Mistake
Students write “biofortification = GM crops” and lose marks. Biofortification is the broader goal (nutrient enrichment through breeding). Genetic modification is one method to achieve it. Conventional cross-breeding of naturally nutrient-rich varieties is equally valid biofortification. If NEET asks “which of the following is NOT biofortification,” a GM crop still counts — don’t eliminate it on that basis.
A related mistake: confusing biofortification with bioremediation (which is about cleaning up pollutants using organisms). The “bio-” prefix trips students up — these are completely different concepts.
| Crop | Nutrient Added | Addresses |
|---|---|---|
| Golden Rice | Beta-carotene (Vitamin A) | Night blindness, VAD |
| Wheat (IARI) | Iron, Protein | Anaemia, Protein deficiency |
| Maize (IARI) | Lysine, Tryptophan | Protein quality |
| Potato | Protein (AmA1 gene) | Malnutrition |
The potato variant (with AmA1 gene from Amaranthus) occasionally appears in JEE/NEET as a trick option — yes, it’s real biofortification, developed in India.