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Unit Evaluation on Biology. Document attached.

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MyWork Form 14/10/16 13:13 Print this page SCIH025061: Unit 2 Evaluation Student ID: C88176220 Student Name: Marin, Pol Course ID: SCIH025061 Course Name: Biology 1 Evaluation ID: 2 Evaluation Name: Unit 2 Evaluation Unit 2 Evaluation Biology 1 (SCIH 025 061) When you feel you are adequately prepared, complete this Unit Evaluation. It is important that you do your own work. If you have difficulty with particular sections, you may use your textbook and course materials for help in answering the questions. After you have completed this evaluation, you will submit it for grading. Select the response that best completes the statement or answers the question. 1. How many atoms does a molecule of sucrose with the chemical composition of C12H22O11 have? a. 11 b. 12 c. 22 d. 45 2. If an atom has 7 electrons, how many are located in the second energy level? a. 2 b. 3 c. 5 d. 7 3. Atoms of the same element that have different numbers of neutrons are called a. protons. b. compounds. c. particles. d. isotopes. https://mywaycool.nebraska.edu/?ActionFile=student/mywork&Action=View+Work&gb_uri=2645489&ptype=L Página 1 de 9 MyWork Form 14/10/16 13:13 4. Consider this energy diagram for a chemical reaction. Overall, is energy being released or absorbed? a. released because the energy level of the reactants is greater than that of the products b. absorbed, because the energy level of the products is greater than that of the reactants c. released, because the reaction is initiated by the addition of heat d. absorbed, because the energy level increases during the reaction 5. How does an enzyme influence a biological reaction? a. It increases the net energy difference between reactants and products. b. It decreases the activation energy necessary to initiate the chemical change. c. It increases the kinetic energy of reactants, thereby increasing their tendency to collide. d. It decreases the kinetic energy of reactants, enabling them to undergo chemical change more easily. 6. Amino acids are the building blocks of which macromolecule? a. carbohydrate b. DNA c. lipid d. protein 7. An organism’s genetic information is stored in which type of macromolecule? a. DNA b. carbohydrate c. lipid d. protein 8. Which of these diagrams most closely approximates the motion phospholipids make in a plasma membrane? a. A b. B c. C d. D 9. Which of the following statements is true about bacterial cells? a. The cells are very large. b. The cells have no nucleus c. They are eukaryotes. d. They have organelles. https://mywaycool.nebraska.edu/?ActionFile=student/mywork&Action=View+Work&gb_uri=2645489&ptype=L Página 2 de 9 MyWork Form 14/10/16 13:13 10. A scientist at the polar ice cap was studying an ice sample from hundred of meters below the surface. While examining the ice, the scientist found some cells from many years ago. Using an electron microscope, the scientist identified these cell structures: a cytoskeleton, mitochondrion, nucleus, cell wall, and ribosomes. What kind of organism did the scientist find? a. animal b. bacteria c. plant d. He did not have enough information. 11. What is a major difference between facilitated diffusion and active transport? a. Active transport moves substances against the concentration gradient. b. Active transport uses proteins in the process. c. Facilitated diffusion moves molecules through the plasma membrane d. Facilitated diffusion requires large amounts of energy. 12. In which types of organisms does the process shown in the following diagram take place? a. plants only b. animals only c. neither plants nor animals d. both plants and animals 13. During photosynthesis light energy is converted to the energy in chemical bonds. What also happens according to the predictions of the second law of thermodynamics? a. chemical energy is converted to light energy b. matter is lost in the process c. heat is released in the process d. the light and chemical energy are equal 14. Which of the following is a substrate used in cellular respiration. a. carbon dioxide b. rubisco c. the product of photosynthesis d. ion channels https://mywaycool.nebraska.edu/?ActionFile=student/mywork&Action=View+Work&gb_uri=2645489&ptype=L Página 3 de 9 MyWork Form 14/10/16 13:13 15. Which of the following is the second step of the Calvin cycle? a. Molecular nitrogen is fixed into nitrate. b. Chemical energy is transferred to 3-PGA molecules. c. Two phosphate groups are joined to form glucose. d. Rubisco converts organic carbon dioxide into inorganic molecules. 16. Which of the following are produced by reactions that take place in the thylakoids and are consumed by reactions in the stroma? a. carbon dioxide and water b. carbon dioxide and ATP c. ATP and NADPH d. ATP and oxygen 17. The energy acquired in photosynthesis is used to make G3P. G3P is then used to synthesize fructose and starch as well. Where in the plant is fructose and starch made in plants. a. in the thylakoid b. in the thylakoid membrane c. in the stroma d. outside the chloroplast 18. Where does the oxygen used in cellular respiration end up? a. water b. ATP c. NADH d. glucose 19. By the end of prophase, each of the following has occurred except the a. coiling of the chromatin into chromosomes. b. breaking down of the nuclear envelope. c. disappearance of the nucleolus. d. lining up of chromosomes in the cell. 20. The chromosomes shown in this diagram are in which state of mitosis? a. prophase b. metaphase c. anaphase d. telophase Use the following line graph to answer questions 21 and 22. https://mywaycool.nebraska.edu/?ActionFile=student/mywork&Action=View+Work&gb_uri=2645489&ptype=L Página 4 de 9 MyWork Form 14/10/16 13:13 21. Which of the cells depicted in this line graph are most likely cancerous? a. A b. B c. C d. D 22. If cancer is present, what is the most likely explanation for what happened to the cells depicted in the curves labeled B and D in the graph? a. They thrived with the cancerous cells. b. They were harmed by radiation therapy. c. They died off due to natural causes. d. They died off because the cancerous cells deprived them of nutrients. 23. Which of the following does not occur as a cell grows larger and larger in size? a. It has difficulty obtaining nutrients. b. It has difficulty eliminating wastes. c. The ratio of surface area to volume increases. d. Diffusion across the cell membrane is impaired. 24. Which of the following graphs shows the correct changes in the amount of DNA in a cell as it moves through the cell cycle? a. A b. B c. C d. D https://mywaycool.nebraska.edu/?ActionFile=student/mywork&Action=View+Work&gb_uri=2645489&ptype=L Página 5 de 9 MyWork Form 14/10/16 13:13 25. Which of these occurs near the end of prophase? a. Sister chromatids are separated. b. The spindle is beginning to form. c. The cell membrane has begun to pinch inward. d. The nuclear membrane has disappeared. 26. Which stage of mitosis is illustrated by this diagram? a. anaphase b. prophase c. metaphase d. telophase 27. Which of the following occurs in telophase? a. The chromosomes relax. b. The chromosomes line up c. The chromosomes move to opposite poles. d. The chromosomes condense. 28. If a cell has 12 chromosomes, how many chromosomes will each daughter cell have? a. 4 b. 6 c. 12 d. 24 29. The normal cell cycle is regulated by a. cyclins. b. enzymes. c. hormones. d. sugars. 30. Cancer cells can reproduce rapidly because they a. are smaller than normal cells. b. bypass interphase. c. undergo mitosis faster than do normal cells. d. spend less time in interphase than do normal cells. 31. What is cancer caused by? a. cell-membrane damage b. metabolic poisoning c. mutation of cell DNA d. immune-system damage https://mywaycool.nebraska.edu/?ActionFile=student/mywork&Action=View+Work&gb_uri=2645489&ptype=L Página 6 de 9 MyWork Form 14/10/16 13:13 32. Prokaryotic cells are defined by lacking both a. a nucleus and ribosomes. b. ribosomes and chloroplast. c. a nucleus and membrane-bound organelles. d. a cell wall and membrane-bound organelles. 33. It is often said that normal cells change into cancerous cells frequently in our bodies. Which of the following explanations accounts for the relative rarity of cancer? a. The cancerous cells die on their own. b. The DNA repair system fixes the mutation that causes cancer. c. The cancer cells grow only very slowly at first. d. The cancerous cells are normally crowded out by normal cell growth. 34. DNA replication occurs during a. anaphase. b. interphase. c. metaphase. d. prophase. 35. A cell that undergoes repeated mitosis without cytokinesis would have a. many daughter cells. b. fewer chromosomes. c. many nuclei. d. cancerous properties. 36. Why is it important for the chromosomes to condense during mitosis? a. to facilitate DNA replication b. to facilitate chromosome movement c. to facilitate cytokinesis d. to facilitate spindle formation 37. Some cancers have a genetic component to them; if a parent has a certain type of cancer the children are more likely than the average population to develop the same cancer. Why might this be? a. Inheriting one mutation from a parent means the individual has to develop fewer mutations to develop the cancer. b. Cancers are inherited but remain dormant until a certain age. c. Parents and children are often exposed to similar environmental factors. d. Cancers are often recessive traits and require alleles from both parents. 38. A stem cell has potential medical uses because it a. undergoes mitosis. b. is not specialized in structure and function. https://mywaycool.nebraska.edu/?ActionFile=student/mywork&Action=View+Work&gb_uri=2645489&ptype=L Página 7 de 9 MyWork Form 14/10/16 13:13 c. is similar to a cancer cell, providing a study system. d. undergoes apoptosis. 39. What is the role of oxygen in cellular respiration? a. It provides electrons for the electron transport chain. b. It combines with carbon monoxide to form carbon dioxide. c. It is needed for the production of light and heat. d. It is the final electron acceptor for the electron transport chain. 40. Which of these cancer-causing substances or agents is it impossible to completely avoid? a. tobacco and second-hand smoke b. ultraviolet ration from the Sun c. food and drinks that the FDA warns may contain carcinogens d. chemical such as asbestos Matching Match the terms given with their definitions. 41. tiny indivisible particles that are the building blocks of matter 42. a pure substance formed when two or more different elements combine 43. complex macromolecules that store and transmit genetic information 44. a combination of two or more substances in which each substance retains its individual characteristics and properties 45. a. ion b. mixture c. compound d. atoms e. nucleic acids an atom that has lost or gained one or more electrons Match the terms given with their definitions. 46. the net movement of particles from an area where there are many particles of the substance to an area where there are fewer 47. a metabolic process that requires oxygen 48. all the chemical reactions in a cell 49. the structures that contain the genetic material that is passed from generation to generation of a cell 50. the diffusion of water across a selectively permeable membrane a. metabolism b. osmosis c. aerobic d. diffusion e. chromosomes When you have completed this evaluation, use the tools on this page to submit it for grading. You may only submit this evaluation one time. Save Submit Cancel https://mywaycool.nebraska.edu/?ActionFile=student/mywork&Action=View+Work&gb_uri=2645489&ptype=L Página 8 de 9 MyWork Form 14/10/16 13:13 The University of Nebraska is an equal opportunity educator and employer. ©2016, The Board of Regents of the University of Nebraska. All rights reserved. https://mywaycool.nebraska.edu/?ActionFile=student/mywork&Action=View+Work&gb_uri=2645489&ptype=L Página 9 de 9 ...
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SCIH025061: Unit 2 Evaluation
Student ID: C88176220
Student Name: Marin, Pol
Course ID: SCIH025061
Course Name: Biology 1
Evaluation ID: 2
Evaluation Name: Unit 2 Evaluation
Unit 2 Evaluation
Biology 1 (SCIH 025 061)
When you feel you are adequately prepared, complete this Unit
Evaluation. It is important that you do your own work. If you have
difficulty with particular sections, you may use your textbook and course
materials for help in answering the questions. After you have completed
this evaluation, you will submit it for grading.
Select the response that best completes the statement or answers the
question.
1. How many atoms does a molecule of sucrose with the chemical
composition of C12H22O11 have?
a. 11
b. 12
c. 22
d. 45
12+22+11 = 45
2. If an atom has 7 electrons, how many are located in the second energy
level?
a. 2
b. 3
c. 5
d. 7
It will have five, because the first level only holds two
3. Atoms of the same element that have different numbers of neutrons
are called

a. protons.
b. compounds.
c. particles.
D. Isotopes.
4. Consider this energy diagram for a chemical reaction. Overall, is
energy being released or absorbed?
A. released because the energy level of the reactants is greater than
That of the products
b. absorbed, because the energy level of the products is greater than
that of the reactants
c. released, because the reaction is initiated by the addition of heat
d. absorbed, because the energy level increases during the reaction
5. How does an enzyme influence a biological reaction?
a. It increases the net energy difference between reactants and products.
b. It decreases the activation energy necessary to initiate the chemical
change.
c. It increases the kinetic energy of reactants, thereby increasing their
tendency to collide.
d. It decreases the kinetic energy of reactants, enabling them to undergo
chemical change more easily.
6. Amino acids are the building blocks of which macromolecule?
a. carbohydrate
b. DNA
c. l...

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