Transcript cells
Cell Theory • All living things are made of cells • All cells come from cells • The smallest functioning unit of life is the cell Draw and differentiate between Prokaryotic and Eukaryotic cells .. Give the bacteria ribosomes! Prokaryotic vs. Eukaryotic Cells • Prokaryotic – – – – Smaller Lack Organelles Circular Chromosome Have ribosomes (smaller in size) – Flagella and cilia with different composition of microtubules • Eukaryotic – Larger cells – Have organelles – Linear chromosomes (and have more than one of them) – Flagella and cilia always have the 9 + 2 arrangement Differentiate between Plant and Animal Cells Other Cell Structures • Microbodies – Peroxisomes: enzymes that help neutralize peroxide and other acids and bases (ex. Catalase) Found mostly in liver, spleen, and kidney – Glyoxysomes – help produce the seed coat Other Cell Structures • In plants = Plastids – Chloroplasts (contain chlorophyll) – Chromoplasts (contain pigments which add color to leaves and flowers i.e. anthocyanin, beta-carotene) – Leukoplasts (produce and store complex carbs like cellulose and starch) Cell Wall Specialities • Plants add several substances to the cell wall: – Suberin – waxy substance found on cell walls on the bottom of the leaf to retain water – Lignin – hard substance added to the cell walls of stems to make them woody Cell Membrane Specialities • • • • For self-recognition membranes have: Glycoproteins (peripheral proteins) that diffuse… Lipoproteins (peripheral proteins) that diffuse… Transmembrane proteins span the entire membrane and bring in most hydrophillic substances like … • Membrane pores – bring in smallest substances (like carbon dioxide…) Structures inside the cell and out • Microfilaments (in the cytoplasm) – Ex. Actin and Myosin – Give added support, organize organelles, and in muscles allow multiple cells to shorten (contract) Microtubules (outside the cell) Ex. Flagella and cilia - multiple tubes make up the structure Eukaryotes (9+2 Chapter 6 Quiz 1. Compare and contrast Prokaryotic and Eukaryotic cells. 2. Compare and contrast the structure and function of a cell membrane and a cell wall. 3. Name and describe the functions of 3 cell organelles. Cell Transport • https://mail.google.com/mail/u/0/#inbox/15 0b8b177ab41ea6?projector=1