Final answer:
The order of amino acids in a protein is called the primary structure. Fatty acid chains can vary in length, with as few as 4 carbon atoms or more. Polysaccharide molecules can have varying lengths depending on the type of polysaccharide.
Step-by-step explanation:
The order of amino acids in a protein is called the primary structure. The amino acids are linked together in a linear chain called a polypeptide. The order of the amino acids determines the identity, properties, and function of the protein.
When it comes to fatty acids, the length of the fatty acid chain refers to the number of carbon atoms it contains. Fatty acids can vary in length, from as few as 4 carbon atoms to as many as 36 or more.
Polysaccharides are long chains of sugar molecules. The length of a polysaccharide molecule can vary depending on the type of polysaccharide. For example, starch, which is a polysaccharide found in plants, can have thousands of glucose molecules linked together.