Question

For each of the following sentences, fill in the blanks with the best word or phrase selected from the list below. Not all words or phrases will be used; each word or phrase should be used only once.

The α helices and β sheets are examples of protein __________________ structure. A protein such as hemoglobin, which is composed of more than one protein __________________, has __________________ structure. A protein's amino acid sequence is known as its __________________ structure. A protein __________________ is the modular unit from which many larger single-chain proteins are constructed. The three-dimensional conformation of a protein is its __________________ structure.

allosteric ligand secondary domain primary subunit helix quaternary tertiary

Answer 1

The secondary structure of proteins refers to the α helices and β sheets. The quaternary structure applies to proteins composed of multiple subunits. The primary structure is the amino acid sequence, while the tertiary structure is the three-dimensional conformation of a protein.

Step-by-step explanation:

The α helices and β sheets are examples of protein secondary structure. A protein such as hemoglobin, which is composed of more than one protein subunit, has quaternary structure. A protein's amino acid sequence is known as its primary structure. A protein domain is the modular unit from which many larger single-chain proteins are constructed. The three-dimensional conformation of a protein is its tertiary structure.