Question

Organic molecules such as carbohydrates, lipids, proteins, and nucleic acids contain some common elements such as carbon, hydrogen, nitrogen, phosphorus, and oxygen. (choose) (Options: carbon, oxygen, hydrogen, nitrogen)
is the element that makes up the organic backbones of all these molecules (This element is also known as the element of life).

Answer 1

Carbon is the element that makes up the organic backbones of all these molecules (This element is also known as the element of life).