What contains 2 alpha chains and 2 beta chains that assume quarternary higher order conformation? BbiGepure opuH orger: Fetal hemoglobin Myoglobin Maternal hemoglobin Immunoglobin

The correct answer is Immunoglobin.<br /><br />Immunoglobulins, also known as antibodies, are proteins produced by the immune system to help fight infections. They are composed of four polypeptide chains: two identical alpha chains and two identical beta chains. These chains come together to form a Y-shaped molecule with a quarternary structure, which is the highest level of protein structure.<br /><br />The other options provided are not correct:<br /><br />1. Fetal hemoglobin: Fetal hemoglobin is a type of hemoglobin found in the fetus and is responsible for carrying oxygen from the mother's placenta to the fetus. It does not have the same structure as immunoglobulins.<br /><br />2. Myoglobin: Myoglobin is a protein found in muscle tissue that stores and transports oxygen. It is a monomeric protein, meaning it is composed of a single polypeptide chain, and does not have the same structure as immunoglobulins.<br /><br />3. Maternal hemoglobin: Maternal hemoglobin is a type of hemoglobin found in the mother's blood during pregnancy. It is responsible for carrying oxygen from the mother's lungs to the fetus. It does not have the same structure as immunoglobulins.<br /><br />In summary, immunoglobulins are the only option among the given choices that contains 2 alpha chains and 2 beta chains that assume a quarternary higher order conformation.