Table 27.1 The Common Amino Acids Found in Proteins Watch a video explanation Nonpolar Side Chains CO COO Alanine Phenylalanine (Phe, F) (Ala, A) NH,* NH,* COO Glycine (Gly, G) NH,+ Proline COO (Pro, P) H H. COO Isoleucine (Ile, I) COO- ÑH,* NH,+ Tryptophan (Trp, W) COO Leucine (Leu, L) H NH,+ COO Methionine .COO Valine H3C (Val, V) (Met, M) NH,+ NH,+ Polar Side Chains H,N. COO COO Asparagine (Asn, N) HO Serine NH,+ NH,+ (Ser, S) OH COO COO Glutamine Threonine H,N (Gln, Q) NH, (Thr, T) ÑH,+ Acidic Side Chains Basic Side Chains COO NH, Aspartic acid (Asp, D) Arginine (Arg, R) COO- NH,+ H,N NH,+ COO Glutamic acid (Glu, E) COO NH,* COO Histidine NH,+ (His, H) Cysteine (Cys, C) HS NH, H,N COO- COO Tyrosine (Tyr, Y) Lysine (Lys, K) NH,+ NH,+ HO

Which of the following statement about the conformation of protein is true?   a. Denaturation of protein causes the changes in the primary structure of the protein b. Primary structure of protein refers to the sequence of amino acid linked by hydrogen bonds c. Alpha-helix and beta-sheet are two types of secondary structures found in proteins d. Amino acids are covalently linked by glycosidic bonds

1. Determine whether each of the following statements describes the primary, secondary, tertiary, or quaternary stucture of a protein. а. Peptide bonds join amino acids in a polypeptide chain. b. Two polypeptide chains are held together by hydrogen bonds. С. Hydrogen bonds form between adjacent segments of the backbone of the same protein to form a "folded fan" structure. 2. List the type of denaturing agent described by the following treatments: a. disrupting the disulfide bonds in hair to straighten it b. baking the proteins in dough to make bread

How many different tetrapeptides can be made under the following conditions? Q.) The tetrapeptide contains one unit each of Asp, Glu, Pro, and Phe.