Biology Chapter 8

basic unit of all forms of life

• Cell

• Cell Theory

fundamental concept of biology that states that all living things are composed of cells; that cells are the basic units of structure and function in living things; and that new cells are produced from existing cells

• Nucleus

• Cell Theory

thin, flexible barrier that surrounds all cells; regulates what enters and leaves the cell

• Prokaryote

• Cell membrane

in cells, structure that contains the cell’s genetic material in the form of DNA

• Cell

• Nucleus

organism whose cells contain a nucleus

• Eukaryote

• Cell

unicellular organism that lacks a nucleus

• Cell membrane

• Prokaryote

fluid portion of the cell outside the nucleus

• Cytoplasm

• Organelle

specialized structure that performs important cellular functions within a eukaryotic cell

• Cytoskeleton

• Organelle

cell organelle consisting of RNA and protein found throughout the cytoplasm in a cell; the site of protein synthesis

• Ribosome

• Lipid bilayer

internal membrane system found in eukaryotic cells; place where lipid components of the cell membrane are assembled

• Endoplasmic reticulum

• Organelle