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Cell organelles

Cell organelles vocabulary

TermDefinition
cell wall rigid outside structure of plasma membrane; protection and support for plants
chromatin substance found in eukaryotic chromosomes that consist of DNA tightly coiled around histones
nucleolus located within the nucleus, makes proteins
ribosomes the site of protein synthesis
cytoplasm clear; gelatinous fluid inside the cell
endoplasmic reticulum the site of chemical reactions in eukaryotic cell; transports proteins lipid components of the cell membrane are assembled here
golgi apparatus sort proteins and packages them into vesicles outside of the cell
vacuole a sac used to store food, enzymes and other needed materials; may also store waste
lysosome contain digestive enzymes; may digest worn out organelles, food, viruses, bacteria
chloroplast organelle found in cells of plants that captures light energy and produces food to store for a later time
plastid plant organelle used for storage
chlorophyll traps light energy; pigment that gives leaves and stems their green color
mitochondrian membrane organelle that breaks down in plants and animals that transform energy ; powerhouse of the cell
cytoskeleton composed of tiny rods and filaments that gives the cell its shape and internal organization
microtubule thin, hollow cylinders made of protein that form framework for the cell
cilia short, hair-like projections used for locomotion; wave-like motion
flagella long-hair like projections used for locomotion.whip-like motion
cell membrane thin flexible barrier that surrounds all cells; allows substances to leave and enter the cell
nucleus controls the activities within the cell
cell basic unit of all living things
cell theory fundamental concept of biology that states all living things are made of cells, cells are the basic units of structure and function in living things and new cells are produced from existing cells
prokaryote do not enclose their genetic material within a nucleus
eukaryote encloses genetic material within a nucleus
organelle specialized structure that performs important cellular functions within a cell
 



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