STUDENT COPY Practice Exam BIOL189SP23 Treat

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Feb 20, 2024

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Name:________________ BIOL189 - Dr. Treat SI Practice Exam 1 55 questions Please be advised that not all concepts may be shown in the practice exam. This should NOT be your only method of study. Should you have any questions please email me. 1. A new drug is developed which selectively cleaves covalent bonds between two sulfur atoms of non-adjacent amino acids in a polypeptide chain. Which level of protein structure in affected molecules would be most directly affected by the drug? a.Secondary Structure b.Tertiary Structure c.Primary Structure d.Quaternary Structure Patty Power Mr. Krabbs wants to make Bikini Bottoms a nicer place to live. He has created a new sauce that he thinks will reduce the production of body gas associated with eating krabby patties from the Krusty Krab. He recruits 100 customers with a history of gas problems. He has 50 of them (Group A) eat krabby patties with the new sauce. The other 50 (Group B) eat krabby patties with sauce that looks just like new sauce but is really just a mixture of mayonnaise and food coloring. Both groups were told that they were getting the sauce that would reduce gas production. Two hours after eating the krabby patties, 30 customers in group A reported having fewer gas problems and 8 customers in group B reported having fewer gas problems. 2. Answer the following about the passage above. ● Which people are in the control group? ● What is the independent variable? ● What is the dependent variable? ● What should Mr. Krabs’ conclusion be? ● Why do you think 8 people in group B reported feeling better?

3. How are triglycerides formed? A.Triglycerides are formed through dehydration synthesis, which results in the loss of H2O B.Triglycerides are formed through hydrolysis, which results in the loss of H2O C.Triglycerides are formed through dehydrations synthesis, which results in the addition of H2O molecules D.Triglycerides are formed through hydrolysis, which results in the production of H2O 4. Which of the following statements is true of the carbohydrate glucose A. Glucose is structural isomer of galactose B. Glucose is a polysaccharide C. Glucose is a pentose sugar D. Glucose contains carbon, hydrogen, and oxygen atoms. 5. Why is butter a solid at room temperature, while vegetable oil is a liquid? A. Butter is a saturated fat and vegetable oil is an unsaturated fat B. Butter is an unsaturated fat and vegetable oil is a saturated fat C. Butter is a polar molecules and vegetable oil is a nonpolar molecule D. Butter is a nonpolar molecule and vegetable oil is a polar molecule 6. What type of carbohydrate is Sucrose? a.Trisaccharide b.Disaccharide c.Polysaccharide d.Monosaccharide

7. During winter a bear will hibernate to conserve energy during the severely cold temperatures where not a lot of food sources are available. During this time bears have a noticeable change in the level of cholesterol. Why might this be? a. They require more cholesterol to spread out the phospholipids within their plasma membrane during cold temperatures to increase ﬂuidity. b. They require less cholesterol to increase movement and ﬂuidity of the plasma membrane c. They require more cholesterol to tighten the plasma membrane and decrease ﬂuidity in order to control what enters and exits the plasma membrane during hibernation. d. They require less cholesterol to spread out the phospholipids and increase ﬂuidity within their plasma membrane. 8. Label the bonds: Ionic, Hydrophobic Interaction(Van Der Waals), Hydrogen, Disulfide bridge.

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. 9. What type of bond is the arrow pointing at? 10.What type of bond combines the bracketed nucleotides? 11. How many bonds are between A&T a. One b. Two c. Three d. Four e. Five 12. How many bonds are between C&G a.One b.Two c.Three d.Four e.Five

13. What Nitrogenous Bases are Purines a. Adenine and Thymine b. Adenine, Thymine, and Guanine c. Thymine, Guanine, and Cytosine d. Guanine and Cytosine e. Adenine, Thymine and Uracil f. Adenine and Guanine g. Thymine and Cytosine h. Adenine and Cytosine 14. What is the definition of a biosphere? a.The global ecosystem. b.All organisms in a given area. c.An organism's genetic material. d.The scientific study of how organisms interact with their environment. 15. Which of the following summarizes the first law of thermodynamics a. Two systems that are in equilibrium with a third system are in equilibrium with one another. b.The total entropy of a system increases over time. c.Energy cannot be transferred or transformed. d.Energy cannot be created or destroyed. 16. List 3 Domains 17. What is not a principle of all living organisms a. Cells are the simplest units of life b. Living organisms grow and develop c. Living organisms maintain homeostasis d. Populations of organisms evolve within a single lifetime e. Living organisms react with their environment f. The genetic material provides a blueprint for reproduction

18. Circle what organelles make up the endomembrane system a. Golgi b. Endoplasmic Reticulum c. Ribosome d. Centriole e. Vesicle f. Lysosome g. Nucleus h. Mitochondria i. Vacuole j. Peroxisome k. Nuclear envelope 19. What theory supports the creation of semi autonomous cells? a. Cell theory b. Endosymbiosis theory c. Binary Fission theory d. Adaptive Structuration theory e. Phagocytosis theory 20. Which of the following is a principle for all living systems? a. Cells are the simplest unit of life b. Living organisms use energy c. Living organisms interact with their environment d. The genetic material provide a blueprint for reproduction e. All of the above 21. Which of the following is not a principle of the cell theory a. All organisms are comprised of 1 or more cells b. Cell ares the smallest units of life c. Cells arise from pre-existing cells d. All cells contain the same organelles

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22. Which of the following choices is the correct order of living systems a. atom, molecule, macromolecules, cells, tissues, organs, organism, species, community, population, ecosystem, biosphere. b. molecule, atom, macromolecules, cells, tissues, organs, organism, species, community, population, ecosystem, biosphere. c. atom, molecule, macromolecules, cells, tissues, organs, organism, species, population, community, ecosystem, biosphere. d. atom, molecule, macromolecules, cells, tissues, organs, organism, species, community. 23. What does it mean when it is said that correlation does not imply causality. Provide an example. 24. Which of the following bonds are individually weak but cumulatively strong? a. Hydrogen and Covalent b. Hydrogen and Ionic c. Hydrogen and Van der Waals d. Covalent and Ionic e. Covalent and Van der Waals 25. Which of the following bonds involves bonding that involves the exchange of electrons a. Hydrogen b. Ionic c. Covalent d. Van der Waals 26. Which of the following is a true statement a. Hydrophilic molecules dissolve in water and hydrophobic molecules do not dissolve in water b. Hydrophilic molecules do not dissolve in water and hydrophobic molecules dissolve in water c. A steroid dissolves in water d. Cholesterol would dissolve in water e. Polar molecules do not dissolve in water f. None of the above.

27. Which of the following comprise the nucleus of an atom a. Protons and neutrons b. Protons and electrons c. Neutrons and electrons d. Electrons and isotopes 28. Which of the following is not an isotope of Carbon a. b. c. d. e. A and C f. B and D 29. The name of the reaction that is used to break down molecules a. Hydrolysis reaction b. Dehydration reaction c. Condensation reaction d. None of the following 30.If a solution has a pH greater than 7 it is considered a. Acidic b. Basic c. Neutral 31. If a solution has a pH less than 7 it is considered a. Acidic b. Basic c. Neutral

32. What are the four classes of organic molecules in biological systems 33. Which of the following groups would contain the largest number of organisms a. Class b. Order c. Phylum d. Family 34. If two organisms are in the same phylum they must also be in the same: a. Class b. Species c. Family d. Kingdom 35. Define hypothesis and theory and explain how they differ from each other. 36. What makes up a nucleotide a. Phosphate, 5 carbon sugar, and Nitrogenous base b. Phosphate, Deoxyribose, and Nitrogenous base c. Phosphate, 5 Carbon Sugar, and Pyrimidine d. None of the following 37. What direction is DNA created? a. 5’-3’ b. 3’-5 c. 1’-5’ d. 2’-5’

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38. What organelle is found in plant cells but not in animal cells a. Chloroplasts and Mitochondria b. Chloroplasts and Cell Wall c. Ribosomes and Cell Wall d. Vacuoles and Mitochondria 39. list the differences and similarities between a plant and animal cell 40. Label the organelles in the cell and write its function: 41. Draw and label a picture of the plasma membrane. Must include 3 major components.

41. List the taxonomic hierarchy in order from least to most exclusive 42. Dependent variable means a. The scientist controls what to test b. Ask a question c. Educated guess d. What is being measured 43. Saturated fats: a. Have many double bonds b. Have no double bonds c. Tend to be oily d. Are electrostatic charges 44. What is the complementary messenger-RNA sequence for the DNA sequence shown below? a. G-T-T-C-C-A b. C-A-A-G-G-U c. G-U-U-C-C-A d. C-A-A-G-G-T

45. Which processes occur in the nucleus? a. 1 and 2 b. 2 and 3 c. 3 and 4 d. 4 and 5 46. Process 2 is known as a. replication b. mutation c. transcription d. translation 47.The molecule below is… a. a saturated fatty acid b. a saturated triglyceride c. an unsaturated fatty acid d. an unsaturated triglyceride e. an unsaturated wax

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48. The molecule below is a a. carbohydrate b. lipid c. steroid d. A and C e. B and C 49. ______ gives rigidity to the cell membrane a. A triglyceride b. A phospholipid c. Wax d. Cholesterol e. Cellulose 50. Identify the macromolecule a. Carbohydrate b. Lipid c. Protein d. Nucleic Acid e. None of the above

51. Identify the following macromolecule f. Carbohydrate g. Lipid h. Protein i. Nucleic Acid j. None of the above 52. Identify the following macromolecule k. Carbohydrate l. Lipid m. Protein n. Nucleic Acid o. None of the above 53. is positive in _____ reactions and energy is absorbed a. Exergonic b. Endergonic c. Spontaneous d. A and C 54. When you eat a carrot you are acting as a(n) a. Heterotroph and primary consumer b. Autotroph and herbivore c. Heterotroph and secondary consumer d. Autotroph and primary producer

55. Draw and Label energy diagrams for exergonic vs endergonic reactions.

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STUDENT COPY Practice Exam BIOL189SP23 Treat

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