Essay About Historical Development Of The Cell Theory And Robert Brownthe Cell Theory

Preliminary Biology Notes of All Topics – Course Note – janaishungry
Search
Essays
Sign up
Sign in
Contact us
Tweet
Index
/Science
Preliminary Biology Notes of All Topics
Year 11 Preliminary BiologyFull Syllabus Dot Point NotesPatterns in Nature, the Local Ecosystem, Life on Earth & Evolution of the Australian BiotaPatterns in NatureOrganisms are made up of cells that have similar structural characteristicsOutline the historical development of the cell theory, in particular the contributions of Robert Hooke and Robert BrownThe cell theory:All living things are composed of cells The cell is the smallest unit of lifeAll living cells arise from pre-existing cells Historical development:1485 – Leonardo da Vinci used glass lens to study small objects 1626 – Francesco Redi conducted experiment which disproved spontaneous generation thus proving ‘all living cells arise from pre-existing cells’ 1665 – Robert Hooke observed cork cells using a compound microscope and described ‘little boxes or cells distinct from one another’ 1676 – Anton von Leeuwenhoek described unicellular organisms – bacteria – in pond water (animalcules)1831 – Robert Brown observed the nucleus in plant and animal cells 1839 – Schleiden and Schwann formulated the cell theory that ‘cells are a small unit of life and ‘all living things are made up of cells’ 1858 – Virchow stated: ‘where a cell exists, there must have been a pre-existing cell, just as the animal only arises from an animals and the plant only from a plant.’ 1933 – Max Knoll and Ernst Ruska developed the transmission electron microscope 1965 – Cambridge Instruments produced first scanning microscopeDescribe the evidence to support the cell theoryAll living things are composed of cells: Leeuwenhoek discovered unicellular organisms Cells are the smallest unit of life: Hooke discovered that the cork is made up of cells All living cells arise from pre-existing cells: Virchow observed cells dividing, disproving spontaneous generationDiscuss the significance of the technological advances to the development of the cell theoryInvention and further development of the microscope: Robert Hooke’s development of the compound microscope enabled him to see the basic structure of cellsImprovements were made to lenses- increased resolving power and allowed more detailed observations of the cell structure.Robert Brown’s later development of a single lens microscope was used to identify the cell nucleus.Ernst Ruska built the first electron microscope in 1933, which allowed a more detailed observation of all cell structures = organellesIdentify cell organelles seen with current light and electron microscopeLight MicroscopeElectron MicroscopeNucleusNucleusNucleolusNucleolusVacuolesVacuolesChloroplastChloroplastCell WallCell WallMitochondriaMitochondriaGolgi BodyCell MembraneEndoplasmic Reticulum (smooth and rough)Lysosomes (mostly animals, rare in plants)RibosomesPeroxisomesDescribe the relationship between the structure of cell organelles and their functionOrganelleStructureFunctionMitochondriaSmooth outer membrane, highly folded inner membrane (structure called matrix, edges called cristae)Site of respiration and creation of ATP for cell energyChloroplastsPlastids containing pigments e.g. chlorophyll stored in internal membrane stacks Site of photosynthesis in green plantsGolgi Body/ApparatusFlattened membrane bound sacsStore and secrete important biochemical e.g. proteins and lysosomesLysosomesMembrane bound spheres or ovals with lipid bilayerContain digestive enzymes to digest unwanted material within the cellSmooth and Rough Endoplasmic Reticulum (ER)Membrane bound channels, where some are smooth (do not consist of ribosomes attached to the outside) and some rough (has ribosomes attached to it)Rough ER collects polypeptides and amino acids from the cytosol and assembles proteins for transportation. Smooth ER manufactures lipids and sometimes continues it metabolism processRibosomes Small spherical bodies either moving freely or connected to rough endoplasmic reticulumSite of protein synthesisNucleusMembrane bound sphere containing DNA, chromosomes and in some cases RNAControl centre of cellCell MembraneFlexible semi-permeable membrane – hydrophilic heads and hydrophobic tails consisting of proteins and lipids with a phospholipid bilayer Selective transport of substances in and out of cellCell WallRigid external coating around the cell membrane made of cellulose (plants) or other material e.g. Silica, chitin, etc.Supports and strengthens cell

Continue for 94 more pages »
Read full document
Download as (for upgraded members)
Citation Generator
MLA 7
CHICAGO
(2017, 08). Preliminary Biology Notes of All Topics. EssaysForStudent.com. Retrieved 08, 2017, from
“Preliminary Biology Notes of All Topics” EssaysForStudent.com. 08 2017. 2017. 08 2017 < "Preliminary Biology Notes of All Topics." EssaysForStudent.com. EssaysForStudent.com, 08 2017. Web. 08 2017. < "Preliminary Biology Notes of All Topics." EssaysForStudent.com. 08, 2017. Accessed 08, 2017. Essay Preview By: janaishungry Submitted: August 5, 2017 Essay Length: 23,564 Words / 95 Pages Paper type: Course Note Views: 277 Report this essay Tweet Related Essays Colonial America Book Notes Colonial America BookNotes John Putnam Demos (1937-) A Little Commonwealth: Family Life in Plymouth Colony NY: Oxford UP, 1970. xvi + 201 p. Ill.: 15 1,877 Words  |  8 Pages All Quiet on the Western Front Notes KEY LITERARY ELEMENTS 1. SETTING All Quiet On The Western Front is set during World War I, behind the German frontlines where Paul Baumer is 7,153 Words  |  29 Pages Research Paper for General Biology Topic - the Reason to Have a Research Paper Format ITLE: RESEARCH PAPER FOR GENERAL BIOLOGY TOPIC THE REASON TO HAVE A RESEARCH PAPER FORMAT The reason to have a research paper format is for 2,037 Words  |  9 Pages Biology Exam Notes Biology The cell: prokaryotes & eukaryotes Prokaryotes: small, basic cell, free floating mess called nucleoid= bacteria Eukaryotes: advanced, larger cell, bound membrane organelles= plant/animal cells 547 Words  |  3 Pages Similar Topics Tigana Chapter Notes Biology 1b Notes Get Access to 89,000+ Essays and Term Papers Join 209,000+ Other Students High Quality Essays and Documents Sign up © 2008–2020 EssaysForStudent.comFree Essays, Book Reports, Term Papers and Research Papers Essays Sign up Sign in Contact us Site Map Privacy Policy Terms of Service Facebook Twitter