Biology – Chap 4 w- Images

positively charged.

53) Based on your knowledge of the polarity of water molecules, the solute molecule depicted here is most likely

60

54) How many grams would be equal to 1 mol of the compound shown in the figure above? (carbon = 12, oxygen = 16, hydrogen = 1)

C) structural isomers.

30) The two molecules shown in the figure above are best described as

C) arrangement of carbon, hydrogen, and oxygen atoms.

31) The figure above shows the structures of glucose and fructose. These two molecules differ in the

D) structural isomers.

32) The figure above shows the structures of glucose and fructose. These two molecules are

E) cis-trans isomers.

33) The two molecules shown in the figure above are best described as

D

35) Which of the pairs of molecular structures shown below depict enantiomers (enantiomeric forms) of the same molecule?

C

36) Which of the pairs of molecular structures shown below do NOT depict enantiomers (enantiomeric forms) of the same molecule?

B

37) Which pair of molecules shown below are not enantiomers of a single molecule?

B) are mirror images of one another.

38) Thalidomide and L-dopa, shown below, are examples of pharmaceutical drugs that occur as enantiomers, or molecules that

D) carboxyl

39) What is the name of the functional group shown in the figure above?

C

40) Which of the structures illustrated above is an impossible covalently bonded molecule?

D

41) Which of the structures illustrated above contain(s) a carbonyl functional group?

None

42) In which of the structures illustrated above are the atoms bonded by ionic bonds?

B

43) Which of the structures illustrated above cannot form hydrogen bonds with water molecules?

A

44) Which functional group shown above is characteristic of alcohols?

C and D

45) Which functional group(s) shown above is (are) present in all amino acids?

B

46) Which of the groups shown above is a carbonyl functional group?

E

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?

C

48) Which of the groups above is a carboxyl functional group?

C

49) Which of the groups above is an acidic functional group that can dissociate and release H+ into a solution?

D

50) Which of the groups above is a basic functional group that can accept H+ and become positively charged?

E

51) Which molecule shown above would have a positive charge in aqueous solution at pH 7?

A

52) Which molecule(s) shown above is (are) ionized in aqueous solution at pH 7?

B and C

53) Which molecules shown above contain a carbonyl group?

C

54) Which molecule shown above has a carbonyl functional group in the form of a ketone?

B

55) Which molecule shown above has a carbonyl functional group in the form of an aldehyde?

D

56) Which molecule shown above contains a carboxyl group?

D

57) Which molecule shown above can increase the concentration of hydrogen ions in a solution and is therefore an organic acid?

B

58) Which molecule shown above can form a dimer linked by a covalent bond?

D) All of these molecules except B will form hydrogen bonds with water.

59) Which molecules shown above will form hydrogen bonds with water?

A

60) Which molecule shown above contains an amino functional group, but is not an amino acid?

B

61) Which molecule shown above is a thiol?

D

62) Which molecule shown above contains a functional group that cells use to transfer energy between organic molecules?

A

63) Which molecule shown above can function as a base?

B) sulfhydryl

66) Which functional group is not present in this molecule?

A) structural isomers

69) Choose the term that correctly describes the relationship between these two sugar molecules:

B

70) Identify the asymmetric carbon in this molecule.

A) the replacement of the OH of a carboxyl group with hydrogen

71) Which action could produce a carbonyl group?