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Science 7

Ch. 2 voc. #1

TermDefinition
cell theory states that all living things are made of one or more cells that cell is the smallest unit of life and all new come from preexisiting
macromolecules form by joining many small molecules together
proteins are long chains of amino acids
lipids is a large macromolecule that does not dissolve in water
carbohydrates one sugar molecule, two sugar molecules, or a long chain of sugar molecules make up
cellulose is a carbohydrate in cell walls in plants that provides structural support
cell membrane is flexible covering that protects the inside of a cell from the environment outside a cell
cell wall is a stiff structure outside the cell membrane
cilia are short hairlike structures
cytoplasm a fluid inside a cell that contains salts and other molecules
cytoskeleton is a network of threadlike proteins that are joined together
prokaryotic cell is not surrounded in membrane
eukaryotic cell contains one nucleus and is surrounded by membrane
organelles have specialized functions
nucleus a part of a eukaryotic cell that directs cell activities and contains genetic information stored in DNA
Nucleolous is often seen as a larger black spot in the nucleus of a cell
nuclear envelope surrounding the nucleaus are two membranes that form a structure call this
ribosomes small structures that make proteins
endoplasmic reticulum (ER) sprouts from the nucleus throughout most of the cytoplasm
mitochondria organelle responsible for production of energy
ATP is the fuel for cellular process such as growth cell division and material transport
Created by: breallen