Question

Which four elements make up the bulk of living cells?

a) Carbon, Hydrogen, Nitrogen, Oxygen
b) Sodium, Potassium, Chlorine, Calcium
c) Iron, Magnesium, Zinc, Copper
d) Silicon, Fluorine, Sulfur, Phosphorus

Answer 1

Carbon, hydrogen, nitrogen, and oxygen make up the bulk of living cells.

Step-by-step explanation:

The four most common elements in living cells are carbon, hydrogen, nitrogen, and oxygen. These elements make up about 99% of the dry weight of cells and are essential for the functioning of biochemical reactions in living organisms.

Other elements like sodium, potassium, chlorine, and calcium are required in smaller amounts as micronutrients or trace elements.