BIOMOLECULES AND ENZYMES

BIOLOGY

PROTEINS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which level of structure includes 2 or more polypeptide chains and looks like a 3D knotted structure? This is the level in which there is a functional protein molecule.
A
Primary
B
Secondary
C
Tertiary
D
Quaternary
Explanation: 

Detailed explanation-1: -Tertiary structure is the next level up from the secondary structure, and is the particular three-dimensional arrangement of all the amino acids in a single polypeptide chain.

Detailed explanation-2: -Quaternary structure is the three-dimensional structure consisting of the aggregation of two or more individual polypeptide chains (subunits) that operate as a single functional unit (multimer). The resulting multimer is stabilized by the same non-covalent interactions and disulfide bonds as in tertiary structure.

Detailed explanation-3: -Tertiary Structure of Proteins Tertiary structure refers to the overall folding of the entire polypeptide chain into a specific 3D shape. The tertiary structure of enzymes is often a compact, globular shape.

Detailed explanation-4: -Tertiary structure-the level of protein structure at which an entire polypeptide chain has folded into a three-dimensional structure. In multi-chain proteins, the term tertiary structure applies to the individual chains.

Detailed explanation-5: -The tertiary structure of the protein Tertiary structure of the protein is a three-dimensional combination of -helices and -sheets that fold next to each other as a result of noncovalent interactions between amino acids’ side groups and the environment surrounding the single polypeptide.

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