The structure & function of large biological macromolecules. Campbell and Reece CHAPTER 5. Macromolecules are Polymers. polymer: long molecule consisting of many similar, sometimes identical, building blocks linked by covalent bonds monomer: the smaller units that make up a polymer.By onofre
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Cell walls. Gram-positive cell walls. Thick layer of peptidoglycan surrounding the plasma membrane Contain teichoic acids. Teichoic acids. Polymers of glycerol or ribitol joined by phosphate groups Amino acids or sugars are attached to glycerol or ribitol groups. Teichoic acids.
Cell Walls. Cell walls are: Structural Provide defense against invading pathogens Provide signaling pathways for cells. Cell Wall Chemistry. Cell walls contain cellulose , pectin and lignin Cellulose is the major component Most abundant polymer in the world
Paret cel·lular. Primary cell walls. Middle lamella. Primary Cell Walls of Plants Are Fiber Composites. Side view. Top view. Cellulose microfibril. Primary cell wall. Pectin. Plasma membrane. Cross-links. Vacuola vegetal. Central vacuole. LE 6-15. Cytosol. Tonoplast. Central
Plant Cell Walls . Chapter 3. Where is the cell wall of plant cells located?. Inside the plasma membrane Outside the plasma membrane Between the plasma membranes of two adjacent cells. The Eukaryotic Plant Cell. cell wall plasma membrane cytoplasm various organelles
All fungi are eukaryotic heterotrophs that have rigid cell walls made of chitin What is eukaryotic? Fungi have a nucleus and membrane-bound organelles What is a heterotroph ? Fungi get their food by eating other organisms or their byproducts and cannot make their own food.
Slide show modified from: http://www.explorebiology.com. Cytoskeleton, Cell Walls, & ECM. Cytoskeleton – network of fibers extending throughout the cytoplasm. MICROTUBULES FUNCTION Structural support and cell movement ~ Move chromosomes during cell division Centrioles & spindle fibers
PBIO 691: Seminar (Plant Cell Walls) . Dr. Allan Showalter Department of Environmental & Plant Biology Molecular and Cellular Biology Program Ohio University Athens, OH 45709. Introduction. There are three major regions of the wall:
Plants: Multicellular , autotrophs, have cell walls. Appear 900 +million years ago!. Water Plants . Algae Nonvascular (no tubes). Brown Algae Gallaries. http://saltaquarium.about.com/od/algaephotosclassificati/ig/Brown-Algae-Photo-Gallery/Asteronema-breviarticulatum.htm.