Protein is a building block. Eggs can become chickens.
Protein is made from the codes of DNA. The DNA itself is not a building block for anything.
amino acid
Protein
Sugar is not a protein. It is a carbohydrate. A sugar molecule can be used as a building block of a protein but it is not a protein.
Amino acids
It is a primary building block for muscle.
The, or an, amino acid.
It's the building block for a protein.
Formatted pieces of content stored in galleries is called the Building Block.
Amino acid is the basic building block of protein.
An essential amino acid and a building block of protein in your body.