A protein composed of more than one polypeptide is known as a:

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Question restatement: A protein composed of more than one polypeptide is known as a: options - quaternary protein, tertiary protein, peripheral protein, glycoprotein, globular protein.

Option 1: quaternary protein. This is the correct concept because quaternary structure refers to the assembly of two or more polypeptide chains (subunits) into a functional protein complex. The presence of multiple polypeptide chains defines the quaternary level of protein structure.

Option 2: tertiary protein. The term tertiary protein would describe the three-dimensional folding of a single polypeptide chain, not a protein made of multiple chains. It reflects the overall 3D shape of one polypeptide rather than subunit composition.

Option 3: peripheral protein. Peripheral proteins are proteins associated with membranes, typically on the surface, and are not defined by having multiple polypeptide subunits. This choice confuses subunit count with membrane localization.

Option 4: glycoprotein. A glycoprotein is a protein that has carbohydrate groups attached. While glycoproteins can exist as multisubunit complexes, the defining feature here is the carbohydrate modification, not the number of polypeptide chains.

Option 5: globular protein. Globular describes the shape of many proteins (roughly spherical in shape) and is not a descriptor of subunit number. It does not specify whether the protein is made of one or multiple polypeptides.

Summary: Among the given options, the description that matches a protein made of more than one polypeptide is quaternary protein, as it explicitly denotes multiple subunits forming a functional complex.

A protein composed of more than one polypeptide is known as a:

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A protein composed of more than one polypeptide is known as a:

View Explanation

Log in for full answers

Similar Questions

Question at position 25 A missense mutation might be affected what level of protein structure?All levels might be affected by a single amino acid substitutionPrimary structure onlyQuaternary structure onlySecondary structure onlyTertiary structure onlyClear my selection

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