BIO1130 Midterm2_FF_2011_Ans

BIO1130 Midterm2_FF_2011_Ans - BIO 1130FF - Midterm...

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Unformatted text preview: BIO 1130FF - Midterm Examination – November 12, 2011 Multiple choice questions - Place your answers on the answer sheet BIO 1130FF An introduction to Organismal biology Midterm examination Worth either 15% or 20% of your final grade Saturday, November 12, 2011 Part A: Multiple choice questions 30 points (1 point/question) Fill in the bubbles for your name and student number and BIO1130FF for the course code. Fill in the same information in text in the boxes above the bubbles. Use only a pencil to fill in the answer sheet. If you erase a question be sure to erase all of the pencil mark. Don’t place any marks anywhere on the sheet other than where the bubbles are for personal information or your answers. Do not place any answers on the question sheet. This is not an open book exam. CAUTION to minimize paper waste this part of the exam has been printed back to back NOTE: If you do not fill in the student number and course code as BIO1130FF it will be impossible to identify your answer sheet and you will receive a ZERO for this part of the exam Page 1 of 6 BIO 1130FF - Midterm Examination – November 12, 2011 Multiple choice questions - Place your answers on the answer sheet FF.1 Members of this Mollusc class have a pair of shells that are hinged together. a. Polyplacophora b. Cephalopoda c. Bivalvia X d. Scaphopoda FF.2 The presence of a single, circular chromosome is characteristic of a. neither Archaea nor Bacteria. X b. both Archaea and Bacteria. c. Bacteria only. d. Archaea only. FF.3 The DNA of an organism is studied and found to contain 14% guanine. This organism should have ____% thymine and ____% cytosine in its DNA. a. 36; 14 X b. 14; 36 c. 36; 36 d. 14; 86 FF.4 What do all the Lophotrochozoa phyla have in common? a. They have trochophore larvae, which swim with the aid of a ring of cilia. b. They expand their bodies continuously during growth. X c. They have members that reproduce sexually and members that reproduce asexually. d. They feed using lophophores, specialized ciliated structures. e. None of the above answers is correct. FF.5 Suppose all of the suspension (filter) feeders were removed from a lake. What would you expect to happen after a brief period of time? a. The water would remain the same. b. The water would become clearer. c. The water would become murkiy and cloudy. X FF.6 Arrange the following layers of a gram-negative bacteria from most external to most internal. 1 = cell membrane, 2 = capsule and 3 = cell wall X a. 3, 1, 2 b. 2, 1, 3 c. 2, 3, 1 d. 1, 2, 3 FF.7 Many physicians administer antibiotics to patients at the first sign of any disease symptoms. Why can this practice cause more problems for these patients, and for others not yet infected? a. Overuse of antibiotics can select for antibiotic-resistant strains of bacteria. X b. Antibiotics may interfere with the ability to identify the bacteria present. c. Antibiotics may cause other side effects in patients. d. The antibiotic administered may kill viruses that had been keeping the bacteria in check. e. Particular patients may be allergic to the antibiotic. Page 2 of 6 BIO 1130FF - Midterm Examination – November 12, 2011 Multiple choice questions - Place your answers on the answer sheet FF.8 If this structure connects the cytoplasm of two Gram-positive bacteria, one of these cells may gain new genetic material: a. cell wall X b. sex pilus c. capsule d. flagellum e. endospore FF.9 Which of the following describe all existing bacteria? a. small, harmful, fast-growing X b. tiny, ubiquitous, metabolically diverse c. pathogenic, omnipresent, morphologically diverse d. extremophiles, tiny, abundant e. all of the above FF.10 Where did the first oxygen come from? a. fermentation b. anaerobic respiration c. aerobic respiration X d. oxidizing water FF.11 Each DNA nucleotide is made up of a. a six-carbon sugar, a nitrogenous base, and one of four amino acids. X b. a five-carbon sugar, a phosphate group, and one of four nitrogenous bases. c. a five-carbon sugar, a nitrogenous base, and one of twenty amino acids. d. a six-carbon sugar, a phosphate group, and one of twenty amino acids. e. a five-carbon sugar, a phosphate group, and one of four amino acids. FF.12 What organisms are most numerous on Earth? a. eukaryotes b. insects c. archaea d. plants e. prokaryotes X FF.13 The three domains of life are a. Archaebacteria, Eubacteria, and Eukaryota. b. Prokaryota, Eukaryota, and Protoctista. X c. Archaea, Bacteria, and Eukarya. d. animals, plants, and microorganisms. FF.14 The muscles of the body wall are derived mainly from which embryonic cell layer in most metazoans? a. mesoderm X b. ectoderm c. mesoglea d. endoderm Page 3 of 6 BIO 1130FF - Midterm Examination – November 12, 2011 Multiple choice questions - Place your answers on the answer sheet FF.15 In transduction, bacterial cells a. make replicate copies of one another. b. replicate DNA molecules. c. take up pieces of DNA that are released as other cells disintegrate. X d. take up pieces of DNA through the use of a virus. FF.16 Which of the following statements about prokaryotes is FALSE? a. They lack a true nucleus. X b. They are found only in certain very specific niches and habitats. c. They are generally smaller than eukaryotes. d. They have a wide range of metabolic activities. FF.17 The most ancient branch point in animal phylogeny is that between having a. diploblastic or triploblastic embryos. b. a body cavity or no body cavity. c. radial or bilateral symmetry. X d. true tissues or no tissues. e. a well-defined head or no head. FF.18 In bacterial transformation, cells a. make replicate copies of one another. X b. take up pieces of DNA that are released as other cells disintegrate. c. take up pieces of DNA through infection of a virus. d. replicate DNA molecules. FF.19 Which of the following best describes the composition of a simplest type of viral particle? a. nucleic acid + capsid + protein spikes b. nucleic acid + envelope X c. nucelic acid + capsid d. nucleic acid only FF.20 Members of this Mollusc class include octopuses, squids, and nautiluses. a. Polyplacophora X b. Cephalopoda c. Gastropoda d. Bivalvia FF.21 Protostomes with a unique layer of tissue called the mantle that may secrete a shell are part of which phylum? a. Arthropoda b. Annelida c. Cnidaria d. Echinodermata X e. Mollusca Page 4 of 6 BIO 1130FF - Midterm Examination – November 12, 2011 Multiple choice questions - Place your answers on the answer sheet FF.22 The purple non-sulfur bacterium Rhodospirillum grows best as a photoheterotroph. What are the most favorable sources of energy and carbon for this bacterium? a. glucose b. light and CO2 c. fructose and light X d. methane and CO2 FF.23 What is a major difference between mitosis and meiosis I? a. DNA replication takes place prior to mitosis, but not before meiosis I. b. Only meiosis I results in daughter cells that contain identical genetic information. c. Prophase is longer and more complex in mitosis. X d. Sister chromatids separate in mitosis, and homologues separate in meiosis I. FF.24 Tube feet of sea stars and the bodies of cnidarians are all supported by a. only nonskeletal structures. b. an exoskeleton. X c. a hydrostatic skeleton. d. an endoskeleton. FF.25 Bacteria and Archaea are most easily distinguished from each other by their: a. reproduction method. b. chromosome structure. X c. transcription and translation mechanism. d. habitat. FF.26 Which of the following statements about the sporophyte in brown algae is TRUE? a. It is haploid and gives rise to spores by mitosis. b. It is diploid and gives rise to spores by mitosis. c. It is haploid and gives rise to spores by meiosis. X d. It is diploid and gives rise to spores by meiosis. FF.27 Animals that have a fluid-filled cavity that separates the gut from the muscles of the body wall and have that cavity completely lined by the mesoderm are said to be a. mesenteries. X b. coelomate. c. pseudocoelomate. d. indeterminate. FF.28 Among protostomes, which morphological trait has shown the most diversity? X a. type of body cavity (coelom vs. pseudocoelom vs. acoelom) b. type of symmetry (bilateral vs. radial vs. none) c. direction of gastrulation (protostome vs. deuterostome) d. number of embryonic tissue types (diploblasty vs. triploblasty) Page 5 of 6 BIO 1130FF - Midterm Examination – November 12, 2011 Multiple choice questions - Place your answers on the answer sheet FF.29 Which of the following does not contribute to prokaryotic genetic variability? X a. binary fission b. gene transfer by conjugation c. mutation d. gene transfer by transformation FF.30 How do the daughter cells at the end of mitosis and cytokinesis compare with their parent cell when it was in G1 of the cell cycle? a. The daughter cells have the same number of chromosomes and twice the amount of DNA. b. The daughter cells have half the number of chromosomes and half the amount of DNA. X c. The daughter cells have the same number of chromosomes and the same amount of DNA. d. The daughter cells have half the amount of cytoplasm and half the amount of DNA. e. The daughter cells have the same number of chromosomes and half the amount of DNA. Page 6 of 6 ...
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