Final answer:
Proteins are polyamides and polymers, constructed from amino acid monomers. They are composed of long chains of amino acids linked by amide bonds but do not contain monosaccharides and are not merely dipeptides.
Step-by-step explanation:
The options that correctly describe proteins are that proteins are polyamides, constructed from amino acid monomers, and are polymers.
- Proteins are polyamides because they are composed of amino acids linked together by amide bonds (also known as peptide bonds).
- Proteins are constructed from amino acid monomers; these monomers join together to form long chains through dehydration synthesis, creating dipeptides, tripeptides, oligopeptides, and eventually polypeptides and proteins.
- Proteins are also polymers, which means they are large molecules made up of repeating structural units (in this case, the amino acid monomers).
Proteins are not dipeptides, as dipeptides are simply pairs of amino acids. Proteins are typically much longer chains of amino acids and can consist of one or several polypeptide chains. Moreover, proteins do not contain monosaccharides as part of their structure.