What type of bonding is present in the primary structure of proteins? A. peptide bond B. hydrogen bond C. ionic bond D. more than one choice is correct

The bonds that are important inthe secondary structure of a protein are  a)hydrogen bonds b.peptide bonds c.hydrophobic interaction d.salt bridges e.disulfide bonds

The side chain of which residue can be hydrogen bond donor:   a. Thr b. Ala c. Ile d. Pro e. Phe

All 20 amino acids found in human proteins have a common structure that includes:   A. An amino group (-NH2)   B. A carboxyl group (-COOH)   C. An R group   D. A and B   E. A, B, and C

1. Is there more than one way to fold a protein, given the conflicting demands of the different "R" groups and the protein existing in a watery environment? 2. Explain what an R group is. 3. Compare the backbone of a polypeptide with that of a nucleic acid. 4. Proteins perform critical functions in all of our cells. Without proteins, life wouldn’t exist. Think of some specific proteins and describe what function they perform.  5. Explain the difference between secondary and tertiary protein structures.

How would adding acid to a non-buffered solution be most likely to affect protein structure? Select one: a. Adding acid would disrupt the primary structure of the protein b. Adding acid would cause the protein to become a lipid c. Adding acid would cause the protein to become a carbohydrate d. Adding acid would disrupt the secondary and tertiary structure of the protein