Which subatomic particle is located in the nucleus and carries a positive charge?

A substance that resists changes in pH by releasing or absorbing hydrogen ions is called a(n):

In a phospholipid bilayer, the hydrophilic “heads” of the molecules orient:

Diffusion of molecules across a membrane with the help of a protein channel, but without the use of energy, is called:

The cell (plasma) membrane is composed primarily of a double layer of:

Movement of molecules from an area of high concentration to an area of low concentration, without the use of cellular energy, is called:

Molecules that share the same molecular (empirical) formula but differ in structure are called:

The atomic number of an element is defined as the number of:

When electrons are shared unequally between two atoms in a bond, the bond is described as:

What does the suffix “-ology” mean, as used in the word biology?