Question

Choose the correct answer from the alternatives given.
Micronutrients are needed in very small amount because:

• A. most of them are mobile in the plant
• B. most function as cofactors in enzymes
• C. most are supplied in large enough quantities in soil
• D. they play only a minor role in the health of the plant.

Answer 1

The correct option is B most function as cofactors in enzymes

Micronutrients are trace elements such as vitamins and minerals. They differ from macronutrients, like carbohydrates, protein and fat, because they are necessary only in very small amounts, generally, these are utilized by plants as cofactors for certain enzymes, eg Mo for nitrogenase. So, the correct option is 'most function as cofactors in enzymes'.