Question

Part A How long is an a-helix that contains 67 amino acids? (The distance between consecutive amino acids in a fully extended chain is 3.5 A; the repeat distance of an a-helix is 5.4 A. Each turn of the helix contains 3.6 amino acids.) Express your answer to two significant figures and include the appropriate units. CHÅR Value O ? Units Submit Request Answer Part B How long is a fully extended peptide chain that contains the same number of amino acids? (The distance between consecutive amino acids in a fully extended chain is 3.5 A; the repeat distance of an a-helix is 5.4 A Each turn of the helix contains 3.6 amino acids.) Express your answer to two significant figures and include the appropriate units. PÅ O O ? Value Units

Answer 1

0 Aing' Given Amino acids = 67 The distance between consecutive amino acids in a fully extended chain is 3.5 Aº 1. The replace distance of an a-helia is 5.440 In every turn of a? - helix there are 3.6 amino acid. so, number of turns in the ? - helia with 74 amino acids will be. 67 3.6 = 18.61 Now, dength of every tun is 5:41. so, length of the? - helix will be shown as follows. =18.61851469 = 100.494 A

1. When the peptide chain is fully entended the distance between amino acids is 3.54? 1. So, length of the fully Extended ? - helia will be as follows. = 67 X 3.5A = 234.5A