Question

Ageing pigment is
a) Melanin
b) Biliverdin
c) Lipofuscin
d) Collagen

Answer 1

Aging is a natural process in which the skin loses its tightness and becomes loose. Many spots, fine lines, and wrinkles start to appear as we age. The skin becomes less elastic and becomes sagged. Such changes are visible in the face, arms, and neck of the body. Regular exercise helps slow the aging process.

Complete answer:

Lipofuscin is a pigment that is responsible for aging. It is yellow-brown pigment granules that are composed of the lipid-containing residues of the lysosomal cell digestion. It is also considered as the wear and tear pigments. It is found in the cells of the liver, kidney, heart, muscle, nerve cells, etc.
Melanin is a pigment that is produced by the cells called melanocytes. Its function is to protect against the skin damage done by the sun. It is also present in other forms. It is responsible for the pigmentation of the skin and hair. It also protects eyes from sunlight damage. Pigmentation of the skin is caused by the accumulation of melanin on the epidermis layer of the skin.
Biliverdin is formed in the spleen. It is present in the bile juice and acts as an intermediate in the degradation of the hemoglobin heme groups of bilirubin. They help to inhibit the mutagens. Biliverdin is the product of heme catabolism.
A collagen is a form of protein that is most abundantly present in the form of protein. It is a part of the connective tissue that forms several body parts which include tendons, ligaments, skin, and muscles. It provides essential structure to the skin and bones.

So, the answer is ‘lipofuscin and Melanin’.

Note: The main pigment responsible for the aging process is lipofuscin. The collagen fibers also provide the structure to the skin and their reduction can lead to aging like symptoms which can be seen in the skin. Melanin is only responsible for providing the skin its distinct colour and pigment.