10. the building blocks of proteins are known as. a. amino acids b. euphoric acid c. oxygen d. carbon dioxide.

The question says 'the building block of proteins are known as The correct option is A, that is, amino acids. Amino acids are simple organic compounds containing carboxyl and amino groups. They serve as building blocks of proteins and as intermediates in metabolism. There are twenty different types of amino acids which are divided into essential and non essential amino acids.