PORTAGE LEARNING CHEM 210 TEST 1

PORTAGE LEARNING CHEM 210 TEST 1 PORTAGE LEARNING CHEM 210 TEST 1 Question 1 True or False: According to the Module, a compound with a molecular mass of 12,000 g/mol is considered a macromolecule. True Question 2 True or False: Biomolecules can have only one functional group. False Question 3 True or False: The following functional group is an aldehyde. False Question 4 True or False: In a eukaryotic cell, the organelles called peroxisomes serve the purpose of digesting macromolecules. False Question 5 True or False: Carbon dioxide has a linear molecular shape AND has a bond angle of 180o. True Question 6 Of the following, is not a property of carbon. forming covalent bonds triple bond formation possessing five valence electrons Correct! reacting to form long chains called polymers forming multiple bonds Question 7 Which of the following is an element not typically found in living organisms? He N He H S O Question 8 is a functional group found in carbohydrates. Esters Thiols Carboxylic acids Alcohols Correct! Amines Question 9 The following functional group is an example of . Ketone Aldehyde Correct! Amide Alcohol Alkene Question 10 A is a chemical formula that does NOT show the C-H and C-C bonds. Covalent formula Line bond formula Empirical formula Kekule’ structure Condensed formula Correct! Question 11 A collection of two or more macromolecules uniting is called a . Supramolecular complex Correct! Monomer Macromolecular structure Dimer Kekule’ complex Question 12 An organic compound with this structure, C–OH, This study source was downloaded by from CourseH on 02-14-2c0o22n1t5a:5in5:s17aGMT -06:00 functional :// Alkane Alkene Alkyne Alcohol Correct! Both b and d Question 13 What element has been called the “super glue” of the chemical world? Ca C H O N Question 14 What molecule is most important for energy storage in cells? Creatine mitochondria DNA RNA ATP Correct! Question 15 What would be the approximate size of a human cell? a. 0.1 inch b. 1 nm c. 10 nm d. 10 μm e. 10 cm Question 16 For propane, there are carbon and hydrogen atoms. 5, 12 4, 10 3, 8 3, 6 None of the above Question 17 For an organic compound, which structure is the most efficient to draw? Condensed Kekule’ Line bond Correct! Structural None of these Question 18 When writing an organic functional group, scientists often write an “R” as part of the structure. What does the R indicate? Argon Routine carbon atom A string of carbon atoms None of the above Question 19 According to the module, the study of carbon compounds is referred to as . Organic chemistry Correct! Inorganic chemistry Biochemistry Environmental chemistry None of the above. Question 20 Which of the following is not a functional group discussed in this module? Alcohol Amine Ketone Aldehyde All of these were discussed. Correct! Question 21 Which number would be closest to the approximate number of ribosomes in an E. coli cell? A. 1 B. 25 C. 250 D. 25,000 E. Both c and d Question 22 Which of the following would most likely have a cell wall? Human brain cells Fungal cells Correct! Snake cells Muscle cells All of the above Question 23 Eukaryotes have molecules that provide a protective structure. This network, which is found in all eukaryotes, is called the . Cell wall Cytoplasm Cytosol Cytoskeleton Correct! Both Cell wall and Cytoskeleton Question 24 What is the molecule responsible for gout? RTehisststuodfytsohuercemwoasldeocwunlloeadCedobryre10c0t0!87 from CourseH on 02-14-2L0u22c1 if5e:5r5i:n17 GMT -06:00 Uric acid Correct! Acetic acid Glucose Glycine Question 25 About how many different elements are found in living organisms? Question 26 Not yet graded / 5 pts (Short response) Explain the common similarity in all prokaryotic and eukaryotic cells. Give a brief explanation of the similarity. Your Answer: They both have a plasma membrane that separates life from non life. It also has a proteins in the wall that allow elements to pass through as nessesscary. The fundamental similarity is that each cell type has a plasma membrane that separates life from non-life. The plasma membrane acts as a barrier to most molecules but does have proteins that permit select molecules to cross via proteins (transporters). The plasma membrane permits the cell to have a different composition of molecules inside the cell than out and defines a space for life to occur. Question 27 Not yet graded / 5 pts (Short response) Would a scientist be more likely to find an element such as O in a biomolecule, or W? Explain which she would more likely find in a biological molecule and give specific physical/chemical properties. Your Answer: O would be more likely. Because of the smaller size the oxygen would have stronger covelant bonds while the tungston would probably have weaker ionic bonds. She would more likely find O. Smaller elements are preferred. In the case of O, it is found in water, so it would be highly concentrated. Smaller elements with smaller atomic shells are favored because they can form stable covalent bonds. Strong bonds form by significant overlap of atoms, such as carbon and hydrogen permitting them to share electrons. The bond that forms requires a substantial amount of energy to break, which allows the bonds to stresses. This bond strength is good news for living organisms. Stable bonds allow cells to form, hair to grow, and skin to protect against abrasion. Larger elements, such as W, tend to form ionic compounds–not covalent. Question 28 Not yet graded / 5 pts (Short response) What element is the basis for life? Describe at least two properties of this element that permit it to serve the basis for life. Your Answer: Carbon is the basic element for human life •It can create cyclic rings or compounds •It can have long chains of carbons creating polymers •It can have single, double, or triple bonds with other carbons and some other elements. 1. Carbon can form strong covalent bonds with a variety of different elements. 2. Besides, carbon can form double and triple bonds with other carbon atoms and other elements (N and o). 3. Carbon can form long chains by forming numerous carboncarbon bonds; we call these large molecules polymer. 4. Lastly, carbon can form cyclic structures, which are also called ring compounds. Question 29 Not yet graded / 5 pts (Short response) How does organic chemistry differ from inorganic chemistry? Your Answer: Organic chemistry mainly focuses the elements carbon and how carbon reacts with other elements. Inorganic chemistry focuses on all other elements and completely leaves out carbon. Organic chemistry is the study of carbon-based compounds. Inorganic chemistry is the study of all other elements, but carbon. There is no need to have separate sub-disciples for organic and inorganic chemistry, but for historical and organizational reasons, the difference exists. Question 30 Not yet graded / 5 pts (Short response) Biochemists study the structure and functional relationships of biomolecules. According to the module, what are two other aspects of living wThiitshsstutdaynsoduricneswuasltdso,wsnluoacdhedabsy 1m00e0c00h8a17n9i3c6a68l7afnrodm tChouerr semH on 02-14-2o0r 2g2a15n:5is 5:m17sGtMhTa-t06b:0i0ochemists study? Your Answer: 1) The communication with and among cells 2)The chemical messangers of organisms (metabolism) In the module, biochemists also study the chemical reactions of organisms (metabolism) and communication within and among organisms. This study source was downloaded by from CourseH on :55:17 GMT -06:00