1) What is epimerization? A) It involves changing the configuration of a carbon B) It involves oxidation of an aldose. C) It involves lengthening the chain of an aldose. D) It involves reduction of an aldose. E) none of the above 2) Which of the following monomer: polymer pairings is mismatched? a. Amino acids: proteins b. Amino acids: peptides c. Monosaccharides: polysaccharides d. Nucleotides: DNA e. They are all correctly matched 3) How do the a and ẞ anomer of a sugar differ? a. By the configuration of the acetal carbon in the ring form b. c. By whether a ketone or aldehyde is present in the straight chained form By the presence/absence of a 2' OH d. By whether the OH on the last chiral center is pointed right or left in the Fischer projection of the straight chained form 4) A salt bridge can occur as part of the apply) a. Primary structure b. Secondary structure of a protein (select all that c. Tertiary structure d. Quaternary structuré 5) True or false: A protein that has been denatured via exposure to acidic conditions is guaranteed to return to its original structure once it has been placed into a neutral environment. a. True b. False 6) Why is solid phase peptide synthesis involving a peptide synthesizer generally preferred over solution phase (select all that apply) a. It leads to less waste b. It is less dangerous c. It is more reliable d. It is easier to obtain a pure product 7) What kind of molecules are linked via a glycosidic linkage? a. Amino acids b. Fatty acids 1) What is epimerization? A) It involves changing the configuration of a carbon B) It involves oxidation of an aldose. C) It involves lengthening the chain of an aldose. D) It involves reduction of an aldose. E) none of the above 2) Which of the following monomer: polymer pairings is mismatched? a. Amino acids: proteins b. Amino acids: peptides c. Monosaccharides: polysaccharides d. Nucleotides: DNA e. They are all correctly matched 3) How do the a and ẞ anomer of a sugar differ? a. By the configuration of the acetal carbon in the ring form b. c. By whether a ketone or aldehyde is present in the straight chained form By the presence/absence of a 2' OH d. By whether the OH on the last chiral center is pointed right or left in the Fischer projection of the straight chained form 4) A salt bridge can occur as part of the apply) a. Primary structure b. Secondary structure of a protein (select all that c. Tertiary structure d. Quaternary structuré 5) True or false: A protein that has been denatured via exposure to acidic conditions is guaranteed to return to its original structure once it has been placed into a neutral environment. a. True b. False 6) Why is solid phase peptide synthesis involving a peptide synthesizer generally preferred over solution phase (select all that apply) a. It leads to less waste b. It is less dangerous c. It is more reliable d. It is easier to obtain a pure product 7) What kind of molecules are linked via a glycosidic linkage? a. Amino acids b. Fatty acids

(a) How many tripeptides can be made from glycine, alanine, and leucine, using each amino acid only once per tripeptide? (b) Write the structural formulas of these tripeptides and name them in the shorthand abbreviation used for showing amino acid sequences.