Study Companion Unit I Biology 109 Fall 2012 Chapter 27: Bacteria and Archaea Information that you should know‚ and questions that you should be able to address. 1. Define the following terms: positive phototaxis‚ negative phototaxis‚ endospore‚ binary fission‚ phototroph‚ chemotroph‚ autotroph‚ heterotroph‚ obligate aerobe‚ facultative anaerobe‚ obligate anaerobe‚ bioremediation 2. 3. What are the two main branches of prokaryotic evolution? What are the components of a prokaryotic cell wall?
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to look into your microscope to see a prokaryotic cell. You will be looking for a cell that 12) is single celled‚ lacking membrane-enclosed nucleus and other membrane enclosed organelles 13) Organisms that are prokaryotes are in the domains 13) Archaea‚ bacteria 14) An antibiotic kills 99.9% of a bacterial population. You would expect the next generation of bacteria 14) to be more resilient and adaptive to the antibiotic 15) Which of the following statements about genetics is true? 15) ________
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Microbiology! 1) Groups of Organisms (7): Eukaryote: TRUE nucleus 1. Fungi 4. Bacteria 2. Algae 5. Rickettsia 3. Protozoa ! Prokaryote: NO Nucleus Ribosome is the only Organelle 6. Mycoplasma (7. Viruses: No cell structure‚ ARE NOT CELLS) Microorganisms are: ! UBIQUITOUS! ! HARMLESS IN THEIR NORMAL HABITAT ! OPPORTUNISTIC (If they leave their normal habitat and get into us) 2) Roles of Microorganisms: (Bacteria and Fungi are “Semi-Good”) - digestion -
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* Question 1 1 out of 1 points | | | Which of the following is NOT a domain of life?Answer | | | | | Selected Answer: | Animalia | Correct Answer: | Animalia | | | | | * Question 2 1 out of 1 points | | | Polar molecules share electrons equally.Answer | | | | | Selected Answer: | False | Correct Answer: | False | | | | | * Question 3 1 out of 1 points | | | Which of the following is NOT a characteristic of life?Answer | | | |
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The evolutionary relationships among cyanobacteria‚ red algae‚ brown algae‚ green algae‚ and flowering plants‚ observed from the results their photosynthetic pigment patterns using thin layer chromatography technique Introduction Endosymbiosis is a process where unicellular organisms engulf other cells resulting a life form that one or both cells are dependent on each other (Campbell et al.‚ 2008). Strong evidence suggests that different types of photosynthetic cyanobacteria underwent endosymbiosis
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1.1 & 1.2 To start this unit I will be discussing about the differences between bacteria‚ viruses‚ fungi and parasites. Bacteria: These are tiny microorganisms‚ they cannot be seen with the naked eye. They exist on virtually every living thing or object in the environment i.e. dirt‚ water‚ caves‚ trees‚ dead animals‚ and within everybody living on earth. Its nutrition is from its surroundings. We carry bacteria in the body‚ mainly in the intestines‚ on the genitalia or on the skin. Bacteria can
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The Impact of Microorganisms on Human Affairs What is microbiology? Microbiology is the study of microorganisms or microbes. The word micro means small in Greek‚ implying that microbes are very minute or small life forms that cannot be seen with just the naked eye. One would need a microscope to see these small life forms. Microbes are everywhere and have a large impact on the world. It all started when one of the most important discoveries in history was made in 1665. Englishman‚ Robert Hooke
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all necessary for the building of functional proteins in a cell. Ribosomes are the site of protein synthesis in a cell‚ and there are two different types‚ depending on the type of cell. Only the 70S ribosomes are found in prokaryotes (bacteria‚ archaea). Eukaryotes‚ (cells that contain a membrane-bound nucleus)‚ have both 70S and 80S ribosomes. The 70S ribosomes are present in mitochondria and chloroplasts of eukaryotic cells (Willey‚ et al‚ 20083). The theory of endosymbiosis is based
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multicellular‚ nucleus and membrane-bound organelles alcohol - archaeobacteria - Prokaryotic single-celled organisms of primitive origin that have unusual anatomy‚ physiology‚ and genetics‚ and live in harsh habitats; when capitalized (Archaea)‚ the term refers to one of the three domains of living organisms as proposed by Woese. ATP - The energy molecule of cells. Adenosine triphosphate. Transfers and stores energy attenuated vaccine - To reduce the virulence
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Life on Earth 1. Analysis of the oldest sedimentary rocks provides evidence for the origin of life. Identify the relationship between the conditions on early Earth and the origin of organic molecules. - Conditions of early Earth: Massive oceans existed Only small landmasses above the surface of the water No ozone layer Large amounts of radiation reached the Earth No free oxygen in the air Large amounts of volcanic activity; heat‚ ash‚ dust and gases into atmosphere Violent electric
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