6 Questions
Which statement about phosphorus in the human body is correct?
It participates in essential biochemical processes.
In what form is the majority of phosphorus found in the human body?
Inorganic phosphate in bones and teeth.
What form of phosphorus is mainly measured in routine biochemical analysis?
Inorganic phosphate in serum/plasma.
Which compound stores biochemical energy in cells?
Adenosine triphosphate (ATP)
What percentage of total phosphorus is found in the serum/plasma?
Less than 1%
Which element is a component of phosphate?
Phosphorus
Study Notes
Phosphorus and Phosphate
- Phosphorus is an abundant element, widespread in its distribution.
- The adult human body contains approximately 560-850 g of phosphorus.
- Phosphate compounds participate in many crucial biochemical processes and are found everywhere in living cells.
Biochemical Importance
- Genetic materials DNA and RNA are complex phosphodiesters.
- Most coenzymes are esters of phosphoric or pyrophosphoric acid.
- The most important reservoirs of biochemical energy are ATP, creatine phosphate, and phosphoenolpyruvate.
Forms of Phosphate in the Body
- 85% of phosphate is found in bones and teeth in the form of hydroxyapatite (Ca10(PO4)6(OH)2).
- 15% is located in cell membranes and intracellular fluid in soft tissues as organic phosphate, incorporated into phospholipids, nucleic acids, and high-energy compounds.
- Less than 1% of total phosphate is found in serum/plasma as inorganic phosphate, which is measured in routine biochemical analysis.
Phosphorus and Phosphate Definitions
- Phosphorus is an element (P).
- Phosphate is a compound that contains phosphorus (PO43-).
Phosphorus is essential for living cells, forming part of DNA, RNA, and coenzymes. It plays a crucial role in various biochemical processes. This quiz covers the importance of inorganic phosphates in biochemistry.
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