What amino acid property makes proteins highly functional

The correct answer would be - structure of protein and conformation of the R group of the particular amino acid.

Explanation:

The functional properties such as solubility, color, water retention and absorption, texture, foam formation, curdling and other are decided and depends on the structure of the protein and make up of the R-group attached to particular amino acid.

Each amino acid has a single conformation different from other amino acid and which is extremely stable, this unique conformation has its chemical properties that helps in proteins to perform certain and particular catalytic and structural function.

Thus, the correct answer is - structure of protein and conformation of the R group of the particular amino acid.