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Biology
A natural science concerned with the study of life or living matter in all its forms and phenomena, especially in relation to their origin, growth, reproduction, structure, behaviour and evolution.
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Biology > Biochemistry 
keratin
Biology; Biochemistry
A tough protein that forms the main part of hair, nails, horns, and feathers. It makes up the outer layer of human skin.
lipid
Biology; Biochemistry
A fatty substance that is found in living things and that is an important source of food energy.
polypeptide
Biology; Biochemistry
A polypeptide is a long, continuous, and unbranched peptide. Proteins consist of one or more polypeptides arranged in a biologically functional way and are often bound to ...
melanin
Biology; Biochemistry
A dark chemical compound that gives color to the skin, hair, scales, feathers, and eyes of animals.
nitrifying bacteria
Biology; Biochemistry
Bacteria that take in nitrogen from the air that is mixed in soil and use the nitrogen to make chemical compounds that plants use as food.
metabolism
Biology; Biochemistry
The chemical reactions that take place in cells and allow living things to grow, function, and repair damaged body tissues.
nutrition
Biology; Biochemistry
The process by which a living thing takes in food and makes use of nutrients, is called as nutrition.
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