Pigment Protein in Animals

Pigment proteins are molecules that absorb light and give color to various biological systems. In animals, these pigment proteins are involved in various functions, including vision, photosynthesis, and oxygen transport. The correct answer to the given question is 'Haemoglobin.'

Haemoglobin

Haemoglobin is a pigment protein found in red blood cells that is responsible for the transport of oxygen from the lungs to the body tissues. It is a globular protein consisting of four subunits, each containing a heme group that binds to oxygen. The heme group has a central iron atom that binds to oxygen, and this binding is reversible, allowing for the release of oxygen where it is needed.

Importance of Haemoglobin

Haemoglobin is essential for the survival of animals, as it ensures that oxygen is delivered to all parts of the body. Without haemoglobin, cells would not receive the necessary oxygen, leading to cell death and organ failure. It is also involved in the regulation of pH in the blood, buffering excess acid and maintaining the balance of the body.

Conclusion

In conclusion, pigment proteins are important molecules in animals that are involved in various functions. Haemoglobin is a crucial pigment protein that plays a vital role in oxygen transport and the maintenance of the body's pH balance.