Exam 1 - Exam | MICR 2123 — Introductory Microbiology Read all directions completely and carefully Name Multiple Choice Circle the letter of the

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Unformatted text preview: Exam | MICR 2123 — Introductory Microbiology Sept 14, 2011 Read all directions completely and carefully. Name Multiple Choice: Circle the letter of the one most correct answer. (2.5 pts. each) 1. Who compared “small animals’ from his teeth before and after drinking coffee? W” A) Hooke C) Koch M ' B) Pasteur @WW 2. is the smallest distance by which two objects can be separated and still be distinguished. A) Magnification Bmeteqtion @Resolut’iofifi D) Refraction? ' h of the following is N_OTtrue about scanning electron microscopy? M The specimen is fixed with heavy metal. = B) The specimen is viewed as three-dimensional. Internal structures can be visualized. ) Live organisms cannot be viewed 4. Directed movements toward or away from a chemical signal are known as: A) gliding B flagellation emotaxis ) locomotion 5. Functions of the cytoplasmic membrane include all of the following except: @transcription C) structural support B) energy storage D) transport of molecules 6. L-Amino acids are: A) Unique to Peptldoglycan @Used in peptidoglycan and protein synthesis B) Unique to protein synthesis D) Unique to Gram + peptidoglycan 7. The bacterial forms a polysaccharide layer, which inhibits phagocytosis. peptidoglycan C) mycolic acid )) capsule D) teichoic acid 8. You have isolated a bacterium from the rumen of a cow and wish to know how it transports the sugar “whonose” into the cell. You perform an experiment that shows when radioactively labeled “whonose” is taken up, it is modified when the organism is grown in the absence of inhibitors of energy production. What is the mechanism of” whonose” transport into this cell? A) Passive transport @Grouptranslocation B) Facilitated diffusion D) Endocytosis 9. Which of the following represents a coupled transport system where two molecules travel in the same directions? Aquaporin C) Antiport Symport D) Diffusion transporters 10. Which organism is NOT correctly matched to its ener source? A) Photoheterotroph — light Photoautotroph — COZ B) Chemoautotroph — Fe2+ D) Chemoheterotroph — glucose Examl " "C'ctory Microbiology Sept 14, 2011 / . i“ Read all directions completely and carefully. Name 3&7? ’T A, 11. Which organism is NOT correctly matched to its carbon source? ’ Photoheterotroph — 002 C) Photoautotroph — C02 Chemoautotroph — C02 D) Chemoheterotroph — glucose 12. Endospores are and are resistant to A) Metabolically active; antibiotics C Metabolically inactive; antibiotics and heat with pressure B) Metabolically active; heat 7 Metabolically inactive; antibiotics and heat 13. hich of the following is NOTtrue about microbes: Some microbes have mechanisms to control their temperature B) Some microbes can control their internal pH C) Some microbes can control their internal salt concentration D) Every organism has an optimum temperature for growth 14. The fastest growth rate for a species occurs at temperatures where a cell’s work most efficiently. A lipids C) polysaccharides @Pmtelns @membranes 15. Psychrophiles favor the cold since their membranes are more fluid at low temperatures owing to the igh proportion of present. aturated fatty acids C) lipopolysaccharides ginsaturated fatty acids D) water 16. Which best describes microaerophiles? A) They cannot grow in the presence of oxygen. B They will use oxygen if it is present, but can grow even if oxygen is not present. hey require a small amount of oxygen. D) They cannot use oxygen to grow, but oxygen won’t kill them. 17. Runoff from agricultural fields, lawns, and golf courses can cause an overgrowth of microbes due to: @Eutrophication C) Antisepsis B) Starvation response D) Pasteurization 18. Which of the following is the most common sexually transmitted disease in the US. and one of the , ‘ost common worldwide? Human papilloma virus (HPV) C) gonorrhea Human immunodeficiency virus (HIV) D) syphilus 19. A major factor in the evolution of killer strains of influenza is that they: A) Only have 8 genes C contain reverse transcriptase B) Have an RNA genome \D_);have a segmented genome 20. Which of the following is one of the most common diarrheal pathogens in children? Rotavirus C) Coxie/Ia burnetii ) HSV—1 D) Clostridium tetani Exam I MICR 2123 — Introductory Microbiology Sept 14, 2011 Fill in the Blank: (points given for each) Read all directions completely and carefully. Peptidoglycan has a backbone consisting of repeating disaccharide units composed of l; 1995 and M E M, . After completion of typical Gr'am staining, are red because they have a g“: b. i- V‘s, peptidoglycan layer, are purple because they have a Gram (211 {‘a :3? 'T t? while Gram mm 1H. t h“: {RE peptidoglycan layer. (12 pts) 1 Z A bacterial growth medium that only allows one or a few types of bacteria to grow is called Q while one that allows many types of bacteria to grow but appear distinct . (4 pts) L1) Name the four phases of the bacterial growth curve and clearly circle the phase in which the growth rate is maximal. (5 pts total) 1)? Lipopolysaccharide has three main structural parts. List them and circle the one that is considered the “toxic portion”. (7.5 pts) 3 ;/\ The famous swan-necked flask experiment was used by to dispense the 1 t theory of .“.-"‘i,?fi£€2tfi523 Roi/t»- . (4 pts) List, IN ORDER, five of the six general steps of a viral growth cycle. (5 pts) 1) ‘ 1 Mi eitmwml‘ 2) 5 i‘ ‘3‘“ 3) V th reheat O «I 4) {.As'ésr'i‘i‘wi‘3; 5) Mai‘: first} 3mm: Fill in the table with five of the Virus families that were listed on the study guide (each blank is worth 0.5 pts — 12.5 pts total) g t . ._ A, 5 {2 , 1; IF. c . k. 11,,” A» g i i, . ‘0 . ...
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This note was uploaded on 01/10/2012 for the course MICR 2123 taught by Professor Hathorn during the Fall '08 term at Oklahoma State.

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Exam 1 - Exam | MICR 2123 — Introductory Microbiology Read all directions completely and carefully Name Multiple Choice Circle the letter of the

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