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Exam 1 - Assignment Example

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UMUC Bio 103 Fall 2012 EXAM 1 60 points Please submit your answers as a MS Word attachment to your Assignment Folder. Submit only the numbered answers to the questions; do not include the original questions. For the multiple choice questions, just submit the letter that corresponds with your answer…
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Download file to see previous pages There are 44 questions, be sure to answer them all. MULTIPLE CHOICE (1 pt each) 1. Which of the following includes all the others? A) atom B) cell C) organism D) ecosystem 2. In science, a hypothesis must be A) testable B) a known fact C) able to be proven absolutely true D) derived from a theory 3. A chlorine atom has 17 protons, 18 neutrons, and 17 electrons. The atomic number of chlorine is A) 8 B) 17 C) 35 D) 52 4. If you place the probe of a pH meter in an unknown liquid and it reads pH 1, the liquid is A) an acid B) neutral C) a base 5. This polysaccharide forms fibers that are a major component of plant cell walls: A) glucose B) cellulose C) starch D) glycogen 6. Glycerol is a building block of A) starch B) enzymes C) vegetable oil D) DNA 7. Which of these types of molecules contain nitrogen? A) proteins B) phospholipids C) polysaccharides 8. Prokaryotic cells, with no nucleus or membranous organelles, are found in A) animals B) bacteria C) fungi D) plants 9. If the concentration of glucose in the water outside of a cell is lower than the concentration inside, A) water will tend to leave the cell by osmosis B) water will tend to enter the cell by osmosis C) glucose will tend to leave the cell by osmosis D) glucose will tend to enter the cell by osmosis 10. ...
Which of these does not have to be present for photosynthesis to occur? A) water B) carbon dioxide C) glucose D) chlorophyll 13. The oxygen in our atmosphere is produced by A) photosynthesis B) cellular respiration C) greenhouse effect D) volcanic eruptions 14. Yeast cells break down glucose anaerobically into A) ethanol and CO2 B) lactic acid and CO2 C) lactic acid and H2O D) ethanol and H2O 15. The net energy gain from complete cellular respiration is A) 2 ATP B) 4 ATP C) 8 ATP D) 36-38 ATP 16. Carbon dioxide is released in A) the light-dependent phase of photosynthesis B) the Calvin cycle C) glycolysis D) the Krebs cycle 17. Which of the following is not a characteristic of enzymes? A) they are proteins B) they speed up the rate of chemical reactions C) they act on specific substances called substrates D) they are used up in each reaction, thus need to be produced in large quantities 18. Each new cell produced by this process will have an identical copy of all chromosomes and genes possessed by the parent cell: A) meiosis B) mitosis 19. During the first division of meiosis, A) homologous chromosomes separate B) chromosomes separate at the centromere C) chromosomes become triploid 20. The number of chromosomes in a human sperm cell is A) 4 B) 8 C) 23 D) 46 21. Exchange of genes between maternal and paternal chromosomes before the first division of meiosis is caused by A) crossing over B) X-linkage C) cytokinesis D) replication 22. If a heterozygous male mates with an albino female, what percentage of albino children would be expected? A) 0% B) 25% C) 50% D) 75% E) 100% 23. Queen Victoria's son Leopold had hemophilia, which is caused by a sex-linked recessive gene (Xh). Leopold lived to be 31 years old and fathered a normal daughter. What is the ...Download file to see next pagesRead More
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