SI Bio 211 Practice Exam I Part I9.11.7 Mayfield1. Which of the following statements are true of all life on Earth?a. It is the product of biological evolution.b. It depends on a special force of nature known as the “life force”.c. it depends on the function of specialized macromolecules called proteins.d. choices a and c.e. choices a, b, and c.2. Why is the understanding of chemistry important for understanding life?a. Because all life is composed of atoms.b. Because special chemical principles, not found elsewhere in nature, are required to understand life.c. Because all the activities which we associate with life involve chemical interactions and/or chemical reactions.d. Because evolution operates at the level of molecules.e. Because the fundamental biological unit of organization is the molecule.3. Two species belonging to the same class must also belong to the samea. species c. order e. familyb. phylum d. genus4. What is wrong with the following statement about the scientific method? “If the results of the experiment are as expected, then the hypothesis is proved.”a. More experiments than one are required to prove an hypothesis.b. A hypothesis is only proved when the results of the experiments are published and repeated by other scientists.c. Hypotheses are easily disproven by experimentation, but almost never proven.d. Hypotheses must be modified many times before they become accepted by the scientific community.e. We are not told whether or not the hypothesis is consistent with other, previously accepted, hypotheses.5. Why are stories of miracles not considered “scientific”?a. Because the government suppresses the evidence.b. Because the reports are not repeatable.c. Because the reports are not logical.d. Because scientists do not report the miracles.e. Because such reports are considered supernatural.6. What constituent of all cells is responsible for storage and transmittal of information?a. nucleus c. protein e. DNAb. polysaccharide d. mitochondria7. Which of the following are features of all cells?a. protein cytoskeletonb. nucleusc. DNA moleculesd. ribosomese. choices c and d both correct.8. Which of the following are characteristic of prokaryotic but not eukaryotic cells?a. circular DNAb. endomembrane systemc. cell walld. polysaccharidese. ribosomes9. Which of the following structures are characteristic of both prokaryotic and eukaryotic cells?a. plasma membrane c. microtubules e. both a and d are correctb. endomembrane system d. DNA10. Which of the following cell structures is responsible for creating and maintaining the shape of animal cells?a. cytoskeletonb. plasma membranec. mitochondriad. cell walle. endomembrane systemSI Bio 211 Practice Exam I Part I9.11.7 Mayfield11. Which of the following structures provides rigidity and strength to a plant cell?a. cytoskeletonb. cell (plasma) membranec. cell walld. thylakoid membranee. spindle12. The Earth’s atmosphere is composed mostly of the following two constituents:a) O2 and H2O, b) CO2 and N2, c) O2 and N2, d) H2 and N2, e) Argon and O213. The half life of Carbon-14 is 5600 years. A fossil has 1/4 the normal ratio of C-14 to C-12. Approximately how old is the fossil?a. 1,400 years oldb. 2,800 years oldc. 11,200 years oldd. 16,800 years olde. 22,400 years old14. In order to adequately categorize the millions of different kinds of creatures, it has proven useful to have eight different classification levels. In each of the following pairs, the highest classification category occurs first (to the left) except one. In which pair does the lower classification level come first?a) phylum/class; b) order/genus; c) family/order; d) domain/phylum; e) family/genus.15. What property of all existing cells must also have been a property of their ancestor cell?a. complex biochemistryb. photosynthesisc. a plasma membraned. circular DNAe. a cell wall16. About how old is the Earth?a. 4.5 million yearsb. 450 million yearsc. 2 billion yearsd. 4.5 billion yearse. 14 billion years17. Which of the following are characteristic features of eukaryotic but not prokaryotic cells?a. cytoskeletonb. ribosomesc. plasma membraned. DNAe. polysaccharides18. What are the Bacteria?A) Primitive multicellular creatures which live in hot springs.B) A major domain of lifeC) A subdivision of the ArchaeaD) One of the major groups of the ProtistaE) Another name for the Gram-positive bacteria.19. Photobacterium leiognathi is a bacterium that lives in the luminescent organs of deep see fish. What kind of symbiotic relationship does this represent?a. bacterial community, b. commensalism, c. mutualism, d. parasitism, e. pathogenesis.20. Where is the Gram-positive cell wall located?a. Inside the plasma membrane.b. Outside the inner membrane and inside the outer membrane.c. Outside the nucleus.d. Outside the plasma membranee. Gram positive bacteria do not have cell walls.SI Bio 211 Practice Exam I Part I9.11.7 Mayfield21. Bacterial flagella are made of what?A) carbohydrateB) peptidoglycanC) silicaD) DNAE) protein22. Bacteria which require complex organic molecules in their food are called ___________a. aerobesb. anaerobesc. heterotrophsd. chemoautotrophse. chemoheterotrophs23. Bacteria which live on your skin without causing disease are described as having what kind of symbiotic relationship with you?a. commensalismb. mutualismc. parasitismd. pathogenesise. heterotrophism24. Which of the following statements describes the least important reason why bacteria are important to human life?a. Bacteria play critical roles in essential chemical cycles in the biosphere.b. Much of our food consists of bacteria.c. Without bacterial disease, humans would be disease free.d. In the food chain, animals eat plants, and plants obtain nutrients from bacterial activity in the soil.e. Fixation of nitrogen.25. Some bacteria cause disease in people. Identifying the bacteria that causes disease is not always easy. What constitutes proof that a particular strain of bacteria causes a particular disease?a. Infection of an animal with the organism.b. Isolation of the bacterium from a diseased personc. Isolation of the bacterium from a sick animald. Demonstration that related bacteria cause diseasee. Satisfying Koch’s postulates26. What is an antibiotic?a. A chemical which kills cells.b. A chemical which kills prokaryotic cells but not eukaryotic cellsc. A chemical which
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