noun. 1  a mutation occurring in a somatic cell, resulting in a change in the morphology or some other aspect of one part of an organism (usually a plant). 2  It may be maintained by vegetative propagation but not by sexual reproduction.oun. 1  a mutation occurring in a somatic cell, resulting in a change in the morphology or some other aspect of one part of an organism (usually a plant). 2  It may be maintained by vegetative propagation but not by sexual reproduction.
Protein has a range of essential functions in the body, including the following: 1  Required for building and repair of body tissues (including muscle). 2  Enzymes, hormones, and many immune molecules are proteins. 3  Essential body processes such as water balancing, nutrient transport, and muscle contractions require protein to function. 4  Protein is a 5  ... P Enzymes, hormones, and many immune molecules are proteins. 2  Essential body processes such as water balancing, nutrient transport, and muscle contractions require protein to function. 3  Protein is a source of energy. 4  Protein helps keep skin, hair, and nails healthy.
Like carbohydrates and lipids, proteins are one of the macronutrients. Though protein provides your body with 4 kcals per gram, giving you energy is not its primary role. Rather, itâs got way too many other things going on.In fact, your body contains thousands of different proteins, each with a unique function. complete protein includes all of the essential amino acids. Complete proteins include all animal proteins and soy. Incomplete proteins lack one or more essential amino acids. Beans, nuts, grains and vegetables are incomplete proteins.