Question

there are four biological molecules that build life (cells)
○ true
○ false

atoms are the most basic unit of
○ mass
○ matter
○ cells
○ space

what makes up the mass of an atom?
○ electrons and protons
○ protons and electrons
○ protons and neutrons
○ neutrons and electrons

Explanation:

First Question:

The four biological molecules (carbohydrates, lipids, proteins, nucleic acids) are essential for building cells and life. So the statement is true.

Matter is anything with mass and volume. Atoms are the basic units of matter as they combine to form molecules and make up all matter. Mass is a property, cells are biological units, space is not related here.

Electrons have negligible mass. The mass of an atom is mainly from protons (in nucleus) and neutrons (in nucleus), as their masses are significant compared to electrons.

Answer:

True

Second Question: