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RU BL 262 - Examination

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BIOLOGY 262 PRINCIPLES OF BIOLOGY: ORGANISMIC, FALL 2010 - FINAL EXAMINATION (PART 1) MULTIPLE CHOICE.For the following multiple choice questions fill in the Scan-Tron sheet with the response that best answers the question or completes the sentence. (1.5% each) 1. Which of the following IS an assumption of scientific philosophy? a. Different events must be caused uniquely. b. Hypotheses can be proven True. c. Sense experience represents reality with some reasonable consistency. d. The universe is chaotic (unordered). e. None of the above. (None are assumptions of scientific philosophy) The samples below measured the number of methicillin resistant Staph. aureus (MRSA) cells per μl derived from a standard broth culture. One culture was exposed to the drug Bacteri-B-Gon®, a second was not, and a third was exposed the cells to vancomysin a drug known to kill MRSA. The hypothesis is that exposure to Bacteri-B-Gon® (BBG) exposure will kill cells. Table. Cell density per μl of E. coli after 10 minutes exposure to Bacteri-B-Gon® and unexposed culture. Two-tailed unpaired T-test P-value comparing unexposed and Bacteri-B-Gone samples = 0.044 Not exposed 110 99 111 108 100 95 Exposed to Bacteri-B-Gon 102 110 130 112 114 121 Exposed to Vancomysin 0 0 1 0 0 0 2. Why did the researchers include the culture exposed to vancomysin when they were studying a different drug?  a. to be certain that MRSA is not a fungus b. to be sure their experimental procedure was working properly c. to directly test their drug of interest d. to form the basis for comparison with the treatment group e. To obtain the opinion of the public about their product 3. The hypothesis is…  a. rejected, data inconsistent with hypoth. and P-value shows lack of significance. b. rejected, data consistent but P-value shows lack of significance. c. rejected, data inconsistent with hypoth. and P-value further supports the inconsistency. d. supported, P-value and data consistent with hypothesis. e. unable to be addressed with these data. Determine the status of the hypothesis that plant species richness will be greater in shade using the following data. Table. Plant species richness per m2 randomly sampled quadrats in Denver, CO. Two-tailed unpaired T-test P-value comparing shady-area and sunny-area samples = 0.35 Shady Area 8 10 12 2 9 3 Sunny Area 5 8 3 10 2 4 4. The hypothesis is…  a. rejected, data inconsistent with hypoth. and P-value shows lack of significance. b. rejected, data consistent but P-value shows lack of significance. c. rejected, data inconsistent with hypoth. and P-value further supports the inconsistency. d. supported, P-value and data consistent with hypothesis. e. unable to be addressed with these data. 5. Nitrogen atoms tend to form how many bonds? a. 1 b. 2 c. 3 d. 4 e. 5 6. The depicted molecule  is which of the following? a. cellulose b. chitin c. glucose d. glycogen e. starch 7. The depicted molecule is which of the following? a. cellulose b. chitin c. glucose d. glycogen e. starch DO NOT WRITE ON THIS EXAM8. Which of the following substances makes up the major part of Gram positive bacterial cell walls? a. cellulose b. chitin c. collagen d. glycogen e. peptidoglycan 9. Which of the following describes a bacterium that causes severe disease solely because of the reproduction of the bacterium? a. highly antibiotic b. highly invasive c. highly toxigenic d. highly xerophytic e. None of the above 10. Where does translation occur in a cell? a. capsule b. cell wall c. DNA d. plasma membrane e. ribosome 11. Where does transcription occur in a eukaryotic cell? a. cytosol b. Golgi apparatus c. nucleus d. plasma membrane e. ribosome 12. Where does glycolysis (only) occur in a eukaryotic cell? a. cytosol b. Golgi apparatus c. mitochondrion d. nucleus e. plasma membrane 13. What type of tissue is depicted below? a. cardiac muscle b. fibrous connective tissue c. loose connective tissue d. skeletal muscle e. smooth muscle 14. Which of the following best describes this tissue ? a. simple columnar b. simple cuboidal c. simple squamous d. stratified columnar e. stratified cuboidal 15. Which of the following best describes the shape these cells ? a. staphylobacillus b. staphylococcus c. staphylospirillum d. streptobacillus e. streptococcus 16. Which of the following most limits aquatic primary production? a. light and nutrients b. light and temperature c. light and water availability d. temperature and nutrients e. temperature and water availability 17. Which of the following best describes the community ecology relationship of a you stepping on and killing an ant without noticing? a. Interspecific amensalism b. Intraspecific amensalism c. Interspecific commensalism d. Intraspecific commensalism e. Interspecific predation DO NOT WRITE ON THIS EXAM18. A population of 10,000 sparrows is undergoing logistic population growth with an intrinsic rate of increase of 0.20 and a carrying capacity of 100,000. What is the population size after 2 years? a. 12,082 b. 12,164 c. 13,600 d. 13,882 e. 14,400 19. For a population of 200 monkeys AT Hardy-Weinberg equilibrium with 32 individuals with the AA genotype, how many individuals are Aa? a. 4 b. 6 c. 36 d. 67 e. 96 20. Given the following genotypes in a population: 200 AA, 400 Aa, 400 aa. Is this population evolving with respect to the “A” gene? a. No b. Yes c. Cannot determine with the info. given. 21. Based on your calculations and conclusions above in 20 ↑, which of the following is the best (most likely) evolutionary explanation for what you observe? a. Inbreeding is occurring. b. Outbreeding is occurring. c. Strong directional natural selection is occurring with respect to the “A” gene. d. Strong stabilizing natural selection is occurring with respect to the “A” gene. e. The organisms mate randomly and there is no natural selection with respect to the “A” gene. 22. Which of the following processes is the ultimate source of evolutionary variation (increases variation)? a. gene flow b. genetic drift c. mutation d. natural selection e. non-random mating 23. Which of the following is TRUE about pterophyte gametophytes? a. They are the dominant generation. b. They make gametes by meiosis. c. They make spores by mitosis. d. They undergo


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