Question

$98$% of all living organisms is made up of just following number of elements.

• A. $25$
• B. $6$
• C. $50$
• D. $100$

Answer 1

The correct option is B $6$

98% of all living organisms are made up of six elements carbon, hydrogen, oxygen, nitrogen, phosphorous and sulphur.

Oxygen is the most abundant element for 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.

Sulfur is an integral part of amino acids like methionine which plays an important role in transcription.

So, the correct answer is option B.