Course Hero Logo

Biology chapter 6 notes - Biology chapter 6 notes January...

Course Hero uses AI to attempt to automatically extract content from documents to surface to you and others so you can study better, e.g., in search results, to enrich docs, and more. This preview shows page 1 - 3 out of 7 pages.

Biology chapter 6 notesJanuary 29, 2020Chapter 6: A Tour of the CellI.How do we observe them?A. 2 basic types of electron microscopes are used to study subcellularstructuresB.Scanning electron microscope (SEM): focus a beam of electrons ontothe surface of a specimen providing images that look 3DC.Transmission electron microscope (TEM): focus a beam of electronsthrough a specimenII.The cellA.Major building block of lifeB.Perform all functions required for lifeC.Two types1.Prokaryote2.EukaryoteIII.Comparing prokaryote and eukaryote cellsA.Basic features:1.Plasma membrane2.Cytosol: semi fluid substance3.Chromosomes (carry genes)4.Ribosomes (make proteins)B. Prokaryote1.No nucleus2.Nucleoid: DNA in an unbound region3.No membrane bound organelles4.Cytoplasmbound by plasma membraneC. Eukaryote1.DNA in a nucleus that is bound by a double membrane2.Membrane bound organelles3.Cytoplasm is the region b/w the plasma membrane and nucleus4.Much larger than prokaryotic cellsIV.General structure of a plant cellA.Plasmodesmata= allow substances to slide right throughB.Central vacuole: regulate water intake and allows the plant to shrink/expandV.OrganelleA.Internal membrane bound sac/ compartment that serves one or morespecialized functions inside eukaryotic cellsB.Allow compartmentmentalization of reactions and “bad molecules”C.Allow subcellular environments
Biology chapter 6 notesJanuary 29, 2020D.Plasma membrane: selective barrier that allows sufficient passage ofoxygen, nutrients, and waste to service the volume of every cellE.Prokaryotic cells DO NOT have membrane bound organellesVI.NucleusA.Most of the genes in eukaryotic cellsB.Surrounded by a nuclear envelope**keeps everything in**1.Bi-lipid layer2.Nuclear pores (pore complexes)3.Membrane bound ribosomesC.Contains nucleoplasm1.Fluid contained within the nucleusD.Contains a nucleolus1.Production and assembly of ribosomesa)Ribosomes are part of eukaryote and prokaryote which is themost important factor of life2.rRNA made inside, proteins made outside3.Chromosomes: DNA is organized into discrete units4.Chromatin: each chromosome contains one DNA moleculeassociated w/ proteinsa)Condenses to form discrete chromosomes as a cell preparesto divide5.Nucleolus: located within the nucleus and is the site of RNAsynthesisE.Ribosomes: protein factories **builds part of the cell**1.Ribosomes: complexes made of ribosomal RNA and protein

Upload your study docs or become a

Course Hero member to access this document

Upload your study docs or become a

Course Hero member to access this document

End of preview. Want to read all 7 pages?

Upload your study docs or become a

Course Hero member to access this document

Term
Winter
Professor
Blanar
Tags

Newly uploaded documents

Show More

Newly uploaded documents

Show More

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture