A. These are all images of

1. amino acid side chains, 2. amino acid backbones, 3. bases in nucleic acids, 4. functional groups (chose the one number)

B. Which of these groups of atoms will be hydrophobic?

1.all except A, 2. only F, 3.C and F, 4. C,D and F (chose the one number)

C. Which of these groups can accept a H+(base)?

1.F only, 2.C only, 3. A only, 4. C and F, 5. D and E, 6.A and B (chose the one number)

D. Which of these groups can donate a H+(acid)?

1. A,B and D, 2. A,B and E, 3.A,B,D and E, 4. A and B, 5.B only (chose the one number)

A B C D E F