Chapter 3 Cell Processes and Energy Test Key Terms

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 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 protein that speeds up chemical reactions in living things

A 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.

a property of cell membranes that allows some substances to pass through, while others cannot

the process by which molecules move from an area higher concentration to an area of lower concentration

the diffusion of water molecules through a selectively permeable membrane

The movement of materials through a cell membrane without using energy

the movement of materials through a cell membrane using energy

the process in which some organisms use water along with sunlight and carbon dioxide to make their own food

an organism that makes its own food

an organism that cannot make its own food