Nanometer One one-thousandth of a micrometer. See base . In eukaryotic cells, the membrane-bound organelle that contains the genetic material. A membrane-bound organelle that both generates and breaks down hydrogen peroxide. Phospholipid A fatty compound that contains phosphate.
Phospholipids make up much of the outer membranes of cells and organelles.
Protein A molecule made up of a number of amino acids arranged in a specific order determined by the genetic code. Proteins are essential for all life processes. Receptor A specialized molecule of a cell's membrane that receives information from the environment and conveys it to other parts of the cell. The information is transmitted in the form of a specific chemical that must fit the receptor like a key in a lock.