Question

An iron-containing protein myoglobin is present in the
A)Spleen
B)Lungs
C)Muscles
D)None of the above

Answer 1

Hint: It is the soft tissue that is found in most animals. It also contains protein filament that is actin and myosin they both are next to one another and produce a contraction. Hence changing the length and shape of the cells. These cells also produce force and motion.

Complete answer:
-In the muscular cells of the animal, a protein is found which is known as the myoglobin. It is an Oxygen storage unit that provides oxygen to the muscles.
-Some mammals like whales and seals are capable of remaining submerged in the water for a long period of time because they have a large amount of myoglobin in their muscles compared to other animals.
-It is also the hemoglobin containing globular protein found in the large quantity in myocytes cells present in the heart and skeletal muscles.
-It contains a heme prosthetic group which in turn binds to the oxygen reversibly and the body uses this oxygen storage protein in the muscles.
-the muscles are able to bind and release the oxygen depending on their concentration in the cell.
-Myoglobin is a member of the globin superfamily and includes hemoglobin, four polypeptide chains and forth oxygen binding sites are present in the hemoglobin. Myoglobin is a single polypeptide chain with one oxygen binding site, and have different binding kinetics of the two protein to oxygen

Spleen - all the vertebrates have spleen organs. The organ spleen is the same in the structure as a large lymph node. The spleen function is to filter blood. It also plays an important role in immunity and also to red blood cells.

Lungs - it is a pair of the organs that is located on both the site of the trachea moves the inhaled air into the lungs by tubular branches called bronchi. The bronchi is divided into smaller branches known as bronchioles.

Note: -So the main function of myoglobin is to supply oxygen to the muscles. This is done by releasing the oxygen supply to the mitochondria. Thus making up the respiratory chain which has the myocytes to meet their high energy demands.
-Many mammals like seals and whales can be submerged for a long period of time inside the water because they have a huge quantity of myoglobin in their muscles as compared to other animals.