exam 1 key

exam 1 key - I pledge on my honor that I have not given or...

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I pledge on my honor that I have not given or received any unauthorized assistance on this examination. Name(Printed)_______________________________ Signature _________________________ Section ____________________________________ My TA's name is ___________________ (1 pt) This exam contains ____ pages and ____ questions (1 pt) Questions 1-30 are worth 2 pts each. MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. __B__ 1) Which of the following statements regarding microorganisms is false ? A. They constitute the major portion of biomass on earth. B. Most of them cause disease in humans. C. In nature they tend to exist in assemblages called populations. D. They have the ability to reproduce, differentiate and evolve. E. They are among the oldest known life forms on earth. __C__ 2) The person whose research formed the foundation of the field of Industrial Microbiology was A) Koch B) Hooke. C) Pasteur. D) van Leeuwenhoek E) Lister __ A __ 3) In aerobic respiration, the final electron acceptor might be A) Oxygen. B) Glucose. C) ATP. D) water E) more than one answer is correct __ B __ 4) Which of the following structures is unique to Gram-positive bacteria? A) 80 S ribosome B) Lipoteichoic acid C) Lipopolysaccharide D) Peptidoglycan E) More than one of the above.
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2 __B__ 5) The graph to the right illustrates the role of enzymes in a biological reaction. Which labeled portion of the graph accurately depicts the activation energy needed in the presence of an enzyme? A. B. C. D. E. __D__ 6) The tree of life classification scheme for life on earth is based on comparisons of A. cell shape B. metabolic activities C. phenotypic properties of living organisms D. nucleotide sequences of genes encoding ribosomal RNA E. ribosome sizes (“80S” vs. “70S”). __C__ 7) Which of the following transport processes requires the expenditure of energy, in order for a bacterium to transport a substance into the cell? A. Facilitated diffusion B. Osmosis C. Group Translocation D. Glycolysis E. More than one of the above choices is correct __B__ 8) The structure identified in the image to the right is best described as a A. flagellum B. pilus C. holdfast D. biofilm E. glycocalyx . __D__ 9) You have isolated a bacterium from some spoiled food in your refrigerator. After isolating a pure culture of this bacterium, you inoculate it into a tube containing a broth that will support its growth. Which tube best depicts the expected distribution of bacteria within the tube, if the organism is a microaerophile?
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3 __A__ 10) From the data contained in the figure, which molecule is best described as a substrate? A. PEP B. Mg 2+ C. ATP D. Pyruvic acid E. None of the above Matching. (2 pts each) Choose the best definition from column B that defines the term or concept in column A. You may only use each definition once. Not all definitions will be used. Column A Column B __Q_ 11 Autoclave A. Characteristics of an organism displayed in an environment __M_ 12 LPS B. Facilitation of a recycling process by the addition of bacteria __E_ 13 Primary metabolite C. Mechanism of classifying bacteria based on their 16S rRNA sequences __F__ 14 Bacteriocin D. Carbohydrate containing material of a Gram-positive bacterium __R_ 15
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exam 1 key - I pledge on my honor that I have not given or...

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