Exam 1 Solutions - General Microbiology | BSCI 223, Exams of Microbiology

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i —d ZY a )6+3 = fe) y Section #/TA Name Last 4 of your ID# | BCSI223 201408 You are a microbiologist working on an Antarctic Exposition exploring a lake that has been trapped under a glacier for thousands of years. The expedition’s chemist tells you there is no oxygen in the samples collected, and the water is near freezing, highly alkaline and hypersaline. You take the recovered soil and water samples make observations using a phase contrast microscope capturing images as you work. Here are two example images: 4oox ERP) 4 : . Y AIA 10p Questions 1-7 are about this expedition. 1. This image does not represent all of the different objects you see, but indicate what you see as three different organisms, Draw arrows to the organisms, label the arrow 1, 2, 3. Provide their approximate size, (2 points per organism) how you would describe the cell morphology (2 pt/org), and if you suspect these are eukaryotes or prokaryotes (2 pt/org) and why you’d make that prediction. (2 pt/org). (24 points for this question) Organism 1: Sp WAM BA. ODKANIO*CS ‘pC O8 ? 2 % J Organism 2 HOCUS ; Pro ka Organism 3: (CXCUS \PypKauores be oF § eS 2. You lab mate Jessie suggests that the bright spots in the phase contrast microscope could be spores. What would some of the properties of the spores be? (List at least two.) Do the images reveal anything that indicates that these are spores? (6 points) ch and Syyal lev § FCONCLNALN 5€. & cyiety cu Midrporqay Cm x OONAIN AIL” DAK OG Molter CLI L 30 points on this page Ub NO Page 1