The movement of materials through a cell membrane using cellular energy.
The movement of materials through a cell membrane without using energy.
The diffusion of water molecules through a selectively permeable membrane.
The process by which molecules move from an area of higher concentration to an area of lower concentration.
A property of cell membranes that allows some substances to pass through, while others cannot.
Any substance that cannot be broken down into simpler substances.
Two or more elements that are chemically combined.
Energy-rich organic compound, such as a sugar or a starch, that is made of the elements carbon, hydrogen, and oxygen.
Energy-rich organic compound, such as a fat, oil, or wax, that is made of carbon, hydrogen, and oxygen.
Large organic molecule made of carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur.
A small molecule that is linked chemically to other amino acids to form proteins.
A type of protein that speeds up a chemical reaction in a living thing.
Very large organic molecule made of carbon, oxygen, hydrogen, nitrogen, and phosphorus, that contains the instructions cells need to carry out all the functions of life.
Deoxyribonucleic acid; the genetic material that carries information about an organism and is passed from parent to offspring.
Ribonucleic acid; a nucleic acid that plays an important role in the production of proteins.
compounds that contain carbon
Compounds that don't contain carbon
The process by which cells break down simple food molecules to release the energy they contain.
The process by which cells break down molecules to release energy without using oxygen.