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MICR 2420
Emma Allen- Vercoe

Student Name_____________________ ID______________________________ MICR*2420 Midterm 1 (example exam) Examiner: Emma Allen-Vercoe Molecular and Cellular Biology Please read all the questions carefully before answering. Section A (Multiple choice questions), there is only one right choice for each question. (30 questions, 1 mark per question). Use pencil to fill the Scantron/computer answer card for Questions 1-30. Use pen to circle the letter corresponding to the correct answer directly on the exam sheet. Section B, Fill in the blanks. Write in pen. Answers written in pencil cannot be re-graded. (5 questions, 2 marks per question) Illegible writing and typographical errors could be marked as incorrect (so use your best handwriting!). The examination is worth 40 marks and will count towards 20% of your final course grade. Examiner use only Section A (30 questions) /30 Section B (5 questions) /10 Total /40 Section A. Multiple choice questions (1 mark each; 30 total): Attempt ALL 30 questions. For each question, circle the single choice that best represents the correct answer. Mark your choices on the scantron (use pencil for the scantron) 1) Edward Jenner vaccinated against smallpox using: a) Killed smallpox virus b) A recombinant protein derived from smallpox c) Live cowpox virus d) Killed cowpox virus e) A toxoid 2) Lithotrophs are: a) Organisms that use light to obtain energy b) Organisms that prefer to live under high pressure c) Organisms that use minerals for biosynthesis d) Usually protists e) Always able to survive at high temperatures 3. Treating cows with antibiotics against cellulolytic bacteria: a) Would prevent shedding of pathogens such as Escherichia coli 0157:H7 by the cows b) Would permit the cows to obtain sufficient nutrition from plant materials c) Would have an overall beneficial effect on the microbiota d) Would inhibit the ability of the cow to obtain sufficient nutrition from foods such as hay e) Would improve the health of the animals 4. Carl Woese pioneered: a) The use of mitochondria in endosymbiotic theory b) A method to sequence DNA c) The use of Gram staining in identifying bacteria d) The study of molecular biology e) The use of rRNA to build phylogenetic trees 5. Bacteriorhodopsin is: a) A retinal-containing transmembrane protein b) A retinal-containing cytoplasmic protein c) A chlorophyll-containing cytoplasmic protein d) A chlorophyll-containing transmembrane protein e) Only found in bacteria 6) Fungi: a) Benefit animals and plants b) Mainly harm plants and benefit animals c) Mainly harm animals and benefit plants d) Neither benefit nor harm animals or plants e) Can both benefit and harm animals and plants 7. The Protozoa are _________________________and usually ________________: a) Prokaryotes / Unicellular b) Eukaryotes / Unicellular c) Eukaryotes / Amitochondriate d) Eukaryotes / Multicellular e) Parasitic / Saprophytes 8. Organisms A, B and C are all found in one community. Organism A utilizes glucose and generates lactate. Organism B converts lactate to CO 2 + Hydrogen, and organism C generates methane from the hydrogen and CO. This relationship between organisms A, B and C is called: a) Metabolism b) Commensalism c) Syntropism d) Competition e) Ecosystem 9. Viroids are: a) Small stretches of RNA encased in a primitive capsid b) Small stretches of DNA encased in a primitive capsid c) Infectious particles that usually infect archaea d) ‘Naked’ infectious RNA molecules e) ‘Naked’ infectious DNA molecules 10. Prokaryotes called ___________do not have a cell wall, and the ___________do not have peptidoglycan. a) Archaea / Mycobacteria b) Mycoplasma / Archaea c) Mycobacteria / Gram-negative bacteria d) Streptococcus / Pseudomonas aeruginosa e) Plasmodium / slime molds 11. In a lichen, the ____________provides protection, and the Cyanobacterium provides ___________: a) algae / vitamins b) fungus / sunlight c) Rhizobium / nitrogen compound d) fungus / organic molecules e) algae / organic molecules 12. Acid fast bacteria can be stained in the Ziehl-Neelsen procedure using: a) carbolfuschin b) saffranin c) India ink d) phenol red e) crystal violet 13) If you had a cell with the structures listed below, what would be the outermost layer of this hypothetical cell? a) Outer membrane b) Capsule c) Surface (S)-layer d) LPS e) Arabinogalactan 14. Which terms describe a prokaryote that grows best at 100°C at pH 2 and has specific requirement for light and carbon dioxide? a) Photoautotrophic, acidophilic, hyperthermophile b) Photoautotrophic, acidophilic, thermophile c) Hyperthermophilic, barophilic, chemolithotroph d) Thermophilic, alkaliphilic, autotroph e) Hy
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