Question

$98$% of living organisms are formed of six elements; carbon, hydrogen, nitrogen, oxygen and

• A. $S$ and $Mg$
• B. $Mg$ and $Na$
• C. $Ca$ and $P$
• D. $P$ and $S$

Answer 1

The correct option is D $P$ and $S$

Oxygen is the most abundant element in the living organism. It is used for respiration. The oxygen inhaled supports the oxidation of food and releases energy. It plays an important role in the oxidative phosphorylation occurring in the mitochondria. The process produces energy in form of ATP.

Nitrogen is an important component of the amino acids which is a monomer of protein.

Carbon and hydrogen is an important constituent of carbohydrates which is an instant source of energy.

Phosphorous forms an important component of ATP which is known as energy currency of the cell as well in the formation of phosphodiester bond to form nucleic acid

Sulfur is an integral part of amino acids and forms protein which id the building blocks and functional component of any organisms.

So, the correct answer is option D.