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38 Cards in this Set
- Front
- Back
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Do bacteria have a nucleus
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No, they are Prokaryotic
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What are cell Membranes made of?
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phospholipid bi layers
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what types of cells have cell membranes?
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All- it encapsulated the cytoplasm and its organells
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What is unique about bacterial cell walls
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its made of Peptidoglycan
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what is the Cytoplasmic membrane, and purpose?
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It is a permeable barrier that separates the materials inside the cell from the environment
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What is cytoplasm
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the fluid within the cell membrane it contains the organells, ribosomes ..ect.
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What is the Nucleus and Nucleoid?
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the nucleus contains the dna encapsulated with in the cytoplasm, a Neucleoid is the free floating dna within the cytoplasm
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What is a Ribosome?
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it is within the cytoplasm responsible for Protein synthisis. and contanis Rna for transcription
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What is a cell wall
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it is the portion of a cellthat exists for cell structure and support, helps prevent the cell from bursting from osmotic pressure
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WHat do microorganisms do to the environment the are within
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they can directly effect and sometimes control it,
ex, production of o2 or other chemicals causing a chain reaction in the environment for what it can support |
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Where are most microorganisms found in the earth
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undergorund/oceans, subsurfaces down to about 10Km
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HOw old is the earth
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4.6 billion years
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how has the leading acuses of death changed form 1900's to present
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1900's top causes were from microbial diseases, we have since learned to better control them, present are phsical (cardiac ect.)
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what are Bio fuels
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they are fuels that are waste products of bacteria, ex. methane, ethanol, hydrogen
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what is bioremediation
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microbes "clean" the environment of its pollutants, ex. oil spills
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Robbert hooke?
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designed the first microscope, drew molds with spores
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Anton Van Leewenhoek?
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Bacteria,improves on the microscope design
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Fredinand Cohn
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Endospores, JOurnal of Plant and Microbiology, groundwork for calssifiacation of Bacteria
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Louis Pasteure
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Lactic acid fermentation, Yeast in alcoholic fermentation, Fallacy of spontaneuos generation
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robert coch
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study of bacteria in pure culture, cause of tuberculosis
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Martinus Beijernck
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concept of a virus
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Sergi winogradsky
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chemolithotrophy
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eli Mechnikoff
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phagocytosis
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Karl Lansteiner
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human blood groups
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Paur Ehrlich
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chemotheraputic agents
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Fredrick Griffith
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Pneumococcus transformation
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Alexander Fleming
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Penicillin
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Barbara Mcclintock
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transposable elements
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Watson & Crick
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Structure of DNA
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Francis Jacob
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Messenger RNA and Ribosomes as site of protein synthisis
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Thomas Brock
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bacteria inhabit boiling hot springs
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Fred Sanger
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Methods for sequencing DNA
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Stanley Prusiner
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Prions
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Luc Montagnier
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HUman imunodefficencey Virus
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What is spontaneous generation? HOw was it disproved
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the beleif that somethign living can come from something lifeless, used a flask showed that when something is streile it will remain that wat indefinately untill it is touched by substances containing living organisms then they will grow
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what is purpose of Koch's Postulates? When not possible to use them?
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showed that bacterium was the cause of disease not a byproduct. couldnt use them when bactiera not in an animal host,
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what factors influence the type of microrganisms present?
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by thier resources, (foods, ) conditions ( ph , temp o2 content ect.)
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describe progression of the types of organisms and changes of environment
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1st bacteria in an anoxic environment, then came cyanobacteria, began oxygenation atmosphere paved wayt for evolution of other life forms, then cam eukaryotes, and then algal, then invertabrates, then vascular plants, then mamals
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