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15 Cards in this Set

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cell theory
All living things are made of cells; Cells are the basic units of life; All cells come from other cells
Element
A substance composed of a single kind of atom
Atom
The smallest particle of an element
Compound
A substance made of two or more elements chemically combined.
Molecule
A combination of two or more atoms that are bonded together.
Carbohydrate (hint: C.H.O.)
Energy-rich compounds that are made of the elements carbon, hydrogen, and oxygen for the energy of the cell. C.H.O.!!!
Protein (hint: C.H.O.N. or C.H.O.N.S.)
Large organic molecule made of carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur for growth and repair of the cell.
Enzyme
A <u> protein </u> that speeds up chemical reactions in the bodies of living things.
DNA (UPDATE SANTHAM)
Deoxyribonucleic acid. These are genetic blueprints.
RNA (UPDATE SANTHAM)
Ribonucleic acid. Also genetic blueprints.
Selectively permeable
a membrane that allows some substances to pass through, while others cannot.
Diffusion
The process by which molecules move from an area in which they are highly concentrated to an area in which they are less concentrated until equilibrium is reached.
Osmosis
The diffusion of water molecules through a selectively permeable membrane.
Passive transport
The movement of materials through a cell membrane without using energy.
Active transport
The movement of materials through a cell membrane using energy.