Question

Read the given statements and select the correct option.
Statement 1 : Haemoglobin is an example of quatemary structure of proteins.
Statement 2 : Haemoglobin molecule is composed of four polypeptide chains-twoα-chains and two β-chains.

Answer 1

Answer:

Statement 2 : Haemoglobin molecule is composed of four polypeptide

it's the correct answer

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Answer 2

Hey there both the statements are correct. As, Proteins are said to have quaternary structure if they consist of 2 or more polypeptide chains untied by force other than covalent bonds (i.e., not peptide are hydrogen bonds). The force that stabilise these aggregates are hydrogen bonds and electrostatic bonds formed between amino acids on the polypeptide chains. Haemoglobin, the oxygen-transporting protein of blood, is an example of quaternary structure. This protein consists of four peptide chains of two types-α and β chains that occur in pairs.