Question

Phosphagen in vertebrates is
A)Phospho crestine
B)Phospho arginine
C)ATP
D)Phosphoric acid

Answer 1

Hint: These are the high energy compounds known as macroergic compounds. These are the high energy phosphate compounds found in muscular tissues in animals. For the maintenance in a concentration range, they allow high-energy phosphate pool

Complete answer
-Phosphagen - is a compound present in the tissue of animals that provides chemical energy in the form of energy phosphate bonds. Creatine phosphate is the most common phosphagen found in the muscles and nerves of vertebrates.
-Phosphate groups are given up by the phosphagens during the tissue activity like in muscle contractions and generate ATP from ADP.
-Whenever the ATP is available the phosphagens again reformed.
-Most of the animals use arginine as phosphagen but creatine is used by the phylum Chordata i.e animals with spinal cords.
-The enzyme creatine kinase makes creatine phosphate or phosphocreatine in a reversible reaction.
-Annelids like earthworms use the compound in the laundry scene which is a set of unique phosphagens.

Additional answer
Phospho arginine- It is a compound ${ C }_{ 6 }{ H }_{ 15 }{ N }_{ 4 }{ O }_{ 5 }P$ of phosphoric acid & arginine. It mainly functions in different invertebrates in a quite similar manner as the phosphocreatine invertebrates. The regulation of cellular energy homeostasis in the times when there is a fluctuation of energy supplies is taken care of by Phospho arginine.
ATP - Adenosine triphosphate is a hydrotrope and an organic compound that aids in providing energy to carry out different processes in the living cells like muscle shrinking, condensate dissolution, and chemical synthesis.
Phosphoric acid - It is also known as orthophosphoric acid (${ H }_{ 3 }{ PO }_{ 4 }$). It is one of the major oxygen acids of phosphorus that is predominantly used to make phosphate salts for fertilizers. Other usages of Phosphoric acid includes the preparations of albumin derivatives, cement for dental treatments, and the sugar and textile industries.

So, the correct answer is, “Phospho crestine”.

Note:
-Phosphagen is a very powerful source of energy required for the movement of muscles and form by anaerobic metabolism.
-Creatine phosphate is used by the phosphagens for the generation of adenosine triphosphate for all the body processes.
-Philip Eggleton and his wife Grace Eggleton discovered the phosphagens.