Parts of the Prokaryotic Cell Check your Understanding

Parts of the Prokaryotic Cell

Check your Understanding 1) What is the main difference between a prokaryotic and eukaryotic cell? 2) What are the parts of a nucleus and where are they located? 3) What types of organisms have prokaryotic and eukaryotic cells? 4) What are the parts of a prokaryotic cell and what are their functions?

Review • What is the main difference between a prokaryotic and eukaryotic cell? • What types of organisms have prokaryotic cells? • What types of organisms have eukaryotic cells?

Main Difference? • Yeah, that’s right…the nucleus! Eukaryotic (“true kernel”) = true nucleus Prokaryotic (“before kernel”) = before nucleus orrrrr…. Pro = no

Parts of the Nucleus • Nuclear envelope: 2 membranes surrounding the nucleus • Nuclear pores: holes in the envelope that allow substances in and out • Nucleoplasm: “cytoplasm of the nucleus”; this is where DNA is found • Nucleolus: small region inside the nucleus where ribosomes are made

So if prokaryotes don’t have a nucleus, where is their DNA? • Prokaryotic DNA is found in a region of the cytoplasm called the “nucleoid region” • Not coiled into linear (Xshaped) chromosomes; unwound in a circular structure

Parts of the Prokaryotic Cell • • • Cell Wall Cell Membrane Ribosomes Cytoplasm Nucleoid Region + DNA • Flagellum

Cell Organelles that are NOT Found in Prokaryotes • Anything with a membrane around it! (AKA membranebound organelles) • Ex: ER, Golgi, vacuoles, mitochondria, chloroplasts

Prokaryotic vs. Eukaryotic Organisms Prokaryotic Eukaryotic Mostly unicellular (one cell) organisms Mostly multicellular (many cells) organisms Examples: bacteria Examples: animals, plants, fungi, protists

So What’s a “Protist”? • A unicellular (one-celled) eukaryote • Examples: Amoeba, Paramecium, Euglena . . Downloaded VideosAmoeba Feeds!. avi . . Downloa ded VideosParam ecium Feeding. avi