BIOLOGY
CARBOHYDRATES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The sequence of amino acids in the chain
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The initial twisting of the chain into
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The 3D folding of the chain into a specific shape
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The joining of two or more polypeptide chains
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Detailed explanation-1: -Some of the proteins are composed of two or more polypeptide chains referred to as sub-units. The spatial arrangement of these subunits with respect to each other is known as quaternary structure.
Detailed explanation-2: -Quaternary structure in proteins is the most intricate degree of organization still considered a single molecule. To be considered to have quaternary structure, a protein must have two or more peptide chains forming subunits. The subunits can be different or identical, and in most cases they are arranged symmetrically.
Detailed explanation-3: -Quaternary structure However, some proteins are made up of multiple polypeptide chains, also known as subunits. When these subunits come together, they give the protein its quaternary structure.
Detailed explanation-4: -The quaternary structure refers to the number and arrangement of the protein subunits with respect to one another. Examples of proteins with quaternary structure include hemoglobin, DNA polymerase, ribosomes, antibodies, and ion channels.
Detailed explanation-5: -Quaternary structure describes how polypeptide chains fit together to form a complete protein. Quaternary protein structure is held together by hydrophobic interactions, and disulfide bridges.