Question

Proteins are often composed of two or more distinct modules that fold up independently of one another. They often represent parts of a protein that function in a semi-independent manner. These modules are called ________.

1) Domains
2) Subunits
3) Peptides
4) Polymers

Answer 1

Modules within proteins that fold and function semi-independently are referred to as domains. They play a critical role in the protein's overall structure and function.Thus the correct option is 1.

Step-by-step explanation:

Proteins are often composed of two or more distinct modules that fold up independently of one another and represent parts of a protein that function semi-independently. These modules are known as domains. Domains can have distinct functional and structural characteristics, contributing to the overall function of the protein. Proteins can be divided into fibrous or globular categories, with up to four levels of structure: primary, secondary, tertiary, and quaternary. The quaternary structure describes the arrangement of protein subunits, which are complexes of more than one polypeptide chain. For example, hemoglobin demonstrates this type of structure with its configuration of multiple subunits.