Haemoglobin is an example of:a)Quaternary Structure of proteinb)Tertiary Structure of proteinc)Primary Structure of proteind)Seconary Structure of proteinCorrect answer is option 'A'. Can you explain this answer?

Question

Answer

Hemoglobin is a tetramer that possesses aquaternary structure containing multiple folded polypeptide structures

Answer

Because there is special arrangement of polypeptide chains with respect to each other

Answer

Haemoglobin is an example of Quaternary Structure of protein.

Explanation:

1. Introduction to Protein Structure:
Proteins are large biomolecules composed of amino acids. They play essential roles in various biological processes. The structure of a protein is crucial for its function. Proteins have four levels of structural organization, namely primary, secondary, tertiary, and quaternary structure.

2. Primary Structure:
The primary structure of a protein refers to the linear sequence of amino acids in the polypeptide chain. It is determined by the sequence of nucleotides in the gene that encodes the protein. The primary structure forms the foundation for higher levels of protein structure.

3. Secondary Structure:
The secondary structure of a protein refers to the local folding patterns of the polypeptide chain. The two common types of secondary structure are alpha helices and beta sheets. These folding patterns are stabilized by hydrogen bonds between the amino acid residues.

4. Tertiary Structure:
The tertiary structure of a protein refers to the three-dimensional arrangement of the entire polypeptide chain. It is primarily determined by the interactions between the amino acid side chains, such as hydrophobic interactions, hydrogen bonds, ionic bonds, and disulfide bonds. The tertiary structure gives the protein its unique shape and allows it to carry out its specific function.

5. Quaternary Structure:
The quaternary structure of a protein refers to the arrangement of multiple polypeptide chains (subunits) into a functional protein complex. It is held together by various types of intermolecular interactions, such as hydrogen bonds, hydrophobic interactions, ionic bonds, and disulfide bonds. The quaternary structure is essential for the stability and function of many proteins.

6. Haemoglobin and Quaternary Structure:
Haemoglobin is a protein found in red blood cells that is responsible for transporting oxygen from the lungs to the tissues. It consists of four polypeptide chains, two alpha chains, and two beta chains. These four subunits come together to form a functional haemoglobin molecule. Therefore, haemoglobin is an example of a protein with quaternary structure.

Conclusion:
Haemoglobin is an example of a protein with quaternary structure. It consists of four polypeptide chains that come together to form a functional protein complex. The quaternary structure is essential for the stability and function of haemoglobin in transporting oxygen throughout the body.

Answer

Haemoglobin is a Quaternary protein because it has 4 polypeptide structure - 2alpha and 2 beta

Similar Class 12 Doubts

-helical structure refers to the

Each polypeptide in a protein has amino acids linked with each other in a specific sequence. This sequence of amino acids is said to be ____________.

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