The fully folded structure of a functional protein composed

The fully folded structure of a functional protein composed of a single polypeptide chain is referred to as the _____ structure.

1) secondary

2) primary

3) tertiary

4) quaternary

Solution

The option is 3.Tertiary structure this is suitable because

Proteins are large bio molecules that are made up of individual units referred to as the amino acids. It is the arrangement of these amino acids that give the protein its structure and function.

The amino acids of a protein have a central alpha carbon atom which is linked to an amino group,a carboxyl group, an hydrogen atom and a variable side chain .These amino acids are linked by a peptide bond to form a protein(peptide bond results due to the condensation reaction between an alpha amino group of one amino acid with the carboxyl group of the other). The C terminal of the protein chain represents the growing end during the formation of a poly peptide chain.

proteins exhibit four levels of organization primary, secondary , tertiary and quaternary structures.

Primary structure of protein refers to the arrangement of simple sequences of amino acids to form a polypeptide chain.It is the repeated folding of this primary structure that leads to the formation of the other structures of proteins.

secondary structure of protein refers to the folding of the polypeptide backbone that is stabilized by the hydrogen bonds between the N-Hand C= O groups . The most common forms of secondary structure are the alpha and the Beta helices .

Tertiary structure refers to the folding of the secondary structure of the protein to give rise to a 3D structure and is mainly brought about by the interactions of the R group of the amino acids.this represents the groups of folds and formations single linear polypeptide chains.

The quaternary structure refers to those proteins with multiple polypeptide chains.