Biology Test – Flashcards
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positively charged.
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53) Based on your knowledge of the polarity of water molecules, the solute molecule depicted here is most likely
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60
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54) How many grams would be equal to 1 mol of the compound shown in the figure above?
(carbon = 12, oxygen = 16, hydrogen = 1)
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C) structural isomers.
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30) The two molecules shown in the figure above are best described as
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C) arrangement of carbon, hydrogen, and oxygen atoms.
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31) The figure above shows the structures of glucose and fructose. These two molecules differ in the
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D) structural isomers.
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32) The figure above shows the structures of glucose and fructose. These two molecules are
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E) cis-trans isomers.
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33) The two molecules shown in the figure above are best described as
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D
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35) Which of the pairs of molecular structures shown below depict enantiomers (enantiomeric forms) of the same molecule?
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C
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36) Which of the pairs of molecular structures shown below do NOT depict enantiomers (enantiomeric forms) of the same molecule?
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B
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37) Which pair of molecules shown below are not enantiomers of a single molecule?
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B) are mirror images of one another.
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38) Thalidomide and L-dopa, shown below, are examples of pharmaceutical drugs that occur as enantiomers, or molecules that
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D) carboxyl
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39) What is the name of the functional group shown in the figure above?
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C
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40) Which of the structures illustrated above is an impossible covalently bonded molecule?
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D
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41) Which of the structures illustrated above contain(s) a carbonyl functional group?
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None
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42) In which of the structures illustrated above are the atoms bonded by ionic bonds?
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B
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43) Which of the structures illustrated above cannot form hydrogen bonds with water molecules?
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A
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44) Which functional group shown above is characteristic of alcohols?
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C and D
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45) Which functional group(s) shown above is (are) present in all amino acids?
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B
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46) Which of the groups shown above is a carbonyl functional group?
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E
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47) Which of the groups shown above is a functional group that helps stabilize proteins by forming covalent cross-links within or between protein molecules?
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C
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48) Which of the groups above is a carboxyl functional group?
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C
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49) Which of the groups above is an acidic functional group that can dissociate and release H+ into a solution?
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D
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50) Which of the groups above is a basic functional group that can accept H+ and become positively charged?
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E
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51) Which molecule shown above would have a positive charge in aqueous solution at pH 7?
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A
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52) Which molecule(s) shown above is (are) ionized in aqueous solution at pH 7?
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B and C
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53) Which molecules shown above contain a carbonyl group?
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C
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54) Which molecule shown above has a carbonyl functional group in the form of a ketone?
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B
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55) Which molecule shown above has a carbonyl functional group in the form of an aldehyde?
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D
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56) Which molecule shown above contains a carboxyl group?
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D
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57) Which molecule shown above can increase the concentration of hydrogen ions in a solution and is therefore an organic acid?
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B
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58) Which molecule shown above can form a dimer linked by a covalent bond?
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D) All of these molecules except B will form hydrogen bonds with water.
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59) Which molecules shown above will form hydrogen bonds with water?
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A
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60) Which molecule shown above contains an amino functional group, but is not an amino acid?
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B
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61) Which molecule shown above is a thiol?
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D
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62) Which molecule shown above contains a functional group that cells use to transfer energy between organic molecules?
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A
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63) Which molecule shown above can function as a base?
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B) sulfhydryl
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66) Which functional group is not present in this molecule?
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A) structural isomers
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69) Choose the term that correctly describes the relationship between these two sugar molecules:
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B
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70) Identify the asymmetric carbon in this molecule.
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A) the replacement of the OH of a carboxyl group with hydrogen
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71) Which action could produce a carbonyl group?
