Question

The nutrition booth has a display comparing protein-rich foods (like beans and fish) with carbohydrate-rich foods (like pasta and fruit). The sign explains that proteins contain nitrogen atoms, but most sugars and fats don’t. Why is nitrogen such a crucial element, specifically for protein molecules?
Question 5 options:

Nitrogen helps proteins dissolve more easily in water and other liquids in cells

Nitrogen makes proteins last much longer during storage and food preparation processes

Nitrogen is an essential component of amino acids, which are the building blocks of proteins

Nitrogen makes proteins taste better and more appealing to humans eating them

Answer 1

Nitrogen is an essential component of amino acids, which are the building blocks of proteins.

Explanation: amino acids contain an amino group (–NH2) and often nitrogen in side chains, and proteins are polymers of amino acids linked by peptide bonds that involve nitrogen.