Approximately 50 percent of every protein molecule is composed of nitrogen. t/f

The statement given in the question is FALSE.

Protein molecules are made from amino acids. Structurally, an amino acid is made up of a carboxyl group, an amino group and a unique side group. The amino group of amino acid is composed on nitrogen linked to two hydrogen atoms. Generally, the nitrogen component of all proteins is between the range of 15% to 25%. The quantity of oxygen in proteins also falls within the same range. Thus, the percentage of nitrogen in proteins is not up to 50%.

thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

hope this