__are constructed from amino acids, and some of these are only available to our bodies if they are ingested

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the answers is proteins and food

Proteins are constructed from amino acids, and some of these are only available to our bodies if they are ingested as food.

Option D

Explanation:

The proteins are heteropolymers made up of many monomers that are the amino acids, there are 2 types of amino acids they are the essential and the non-essential amino acids, the non-essential amino acids are present within the body whereas the essential amino acids need to be supplemented through food. The combination of both amino acids are required for stable formation of proteins.

this protocol provides a detailed procedure for total protein extraction for western blot analysis from achieved samples following trizol isolation of rna.

the second type of galaxy is called a barred spiral, which has a thing called a bar straddling the nucleus