Question

hemoglobin is a?
A.Fibrous protein
B.Globular protein
C.Enzyme
D.protein

Answer 1

Hint: Hemoglobin is delivered in bone marrow by erythrocytes and is a course with them until their decimation. It is then separated in the spleen, and a portion of its parts, for example, iron, are reused deep down marrow.

Complete answer:
Every hemoglobin atom likewise has appended a solitary cysteine amino corrosive, which pulls in nitric oxide from the lungs. The advanced hemoglobin circles and is brought through the body to the tissues, where the nitric oxide enlarges the little vessels, permitting hemoglobin to convey its oxygen to the tissues. At that point the oxygen-and nitric oxide–free hemoglobin atom gets carbon dioxide and free nitric oxide and transports both back to the lungs, where they are breathed out as waste.
Hemoglobin is delivered in bone marrow by erythrocytes and is circled with them until their obliteration. It is then separated in the spleen, and a portion of its parts, for example, iron, are reused deep down marrow. Different segments, for example, the heme gatherings, are separated into bilirubin, moved to the liver, and emitted with the bile into the digestive tract for possible disposal from the body
Hemoglobin structure: Hemoglobin has a quaternary structure. It comprises two sets of various proteins, assigned the and β chains. There are 141 and 146 amino acids in the and β chains of hemoglobin, individually. As in myoglobin, every subunit is connected covalently to an atom of heme. Hence, hemoglobin ties four O2 particles. The two indistinguishable α chains and the two indistinguishable β chains are orchestrated tetrahedral These units are held together by hydrophobic communications, hydrogen holding, and particle sets (salt extensions) between oppositely charged amino corrosive side chains.

Hence the correct answer is option(D)

Note: Hemoglobin is made out of four subunits each containing a cofactor known as a haem bunch that incorporates an iron iota place. The principle segment that ties with oxygen is the iron. Henceforth every particle of hemoglobin is equipped for conveying four oxygen atoms.