various tissues of both plants and animals vary in their protein concentration in which the concentrations were in most cases determined by the metabolic activities that usually take place in such tissues. For instance, the metabolic activities taking place in egg albumen were highly controlled by or involved proteins more than other somatic cells. More specifically, the egg cell contained a lot of DNA molecules which are naturally proteins; necessary for relaying genetic factors from the parents to the offsprings. From the general cell physiology, various cells from different body parts perform different metabolic activities where the chemicals of life involved in each activity also varies from one tissue to another. In this regard therefore, the difference in protein concentration in different tissues as observed was as a result of the difference in metabolism taking place in them (Bruce, Bray & Hopkin, 1999).

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