Exams

A molecule of DNA is a polymer composed of nucleotides. Each nucleotide is composed of a nitrogenous base, a five-carbon sugar (deoxyribose), and a phosphate group.

Eukaryotic cells are found in plants, animals and unicellular organisms.

The three main part of Eukaryotic cells are

1. Plasma membrane or membrane-bound organelles which carries out the cell functions.

2. Nucleus which contains the cell's DNA (and)

3. Cytoplasm which is a jelly like fluid interior of the cell.

Vitiligo is a condition in which the skin loses its pigment cells (melanocytes). This can result in discolored patches in different areas of the body, including the skin, hair, retina and mucous membranes.

Many disorders have been linked to vitiligo. They are::

Hashimoto thyroiditis,

Graves disease,

Addison disease and

diabetes mellitus,

alopecia areata,

pernicious anemia,

inflammatory bowel disease,

psoriasis, and

autoimmune polyglandular syndrome.