Exam 2 Review

Which of the following is NOT a nonpolar amino acid

• M

• I

• V

• N

Which of the following is NOT a polar uncharged amino acid

• Q

• S

• T

• F

Geometry of amino acids

Which two amino acids have an absorbance at 280 nm?

• F

• P

• Y

• W

Which two amino acids have amide groups?

• P

• Q

• C

• N

The pKa of the N terminus is —-, and the C terminus is —-

• 3.9, 12.5

• 2, 9

• 12.5, 3.9

• 9, 2

pH greater than pKa

• Deprotonate

• Protonate

pKa of D, then E

• 8.4, 10.5

• 10.5, 12.5

• 3.9, 4.1

• 4.1, 3.9

All amino acids are chiral, except for

• tyrosine

• glycine

• phenylalanine

• proline

D/L form is based on

• Glyceraldehyde

• proline

• fructose

• glucose