Question

19) The form of dipeptide aspatylserine (Asp-Ser) obtained from two amino acids, aspartic acid and serine, whose structures are shown here, is HiN-CH-C-0HIN-CH-C-0 CH2 CH OH aspartic acid serine A HN-CH-C-o-N-CH-C-o CH OH CH2 coo -(H-C-o-H-c-o CH OH CH2 HIN CH-C-N-CH-C-O CH OH CH H-CH-CH CH CH OH coo- 20) Where is the peptide bond located in this dipeptide? serine valine a) the CO-NH joining serine and the valine b) the doubly bonded oxygen just left of center between the amino acids e) the CH-CO on the top of the serine going to the right d) the NH CH between the serine and valine 21) What is the net charge on the oligopeptide in the figure shown here at pH 17 HN-CH-C-N-CH-C-N-CH-C-0 CH H C HCH COO HIN c) 2+ 4) 0 22) The structure of the dipeptide, Pbs-Gly, in a solution of pH 14 is b) c) 23) The sequence of the amino acids in a protcin is known as thestracture. b) secondary e) terciary 24) The e-belix ม.43-pleated sheet are bath forms erthe-structure of proteins b) secondary

Answer 1

19) Peptide bond is tormed when two amino aoids combine ai - COO H, N - CH 3 CH-CH2 CH2 Optiom a 21 At pHa 1, Solutiom is acidic c p Peptide exist protonie dorm. au Cs Scanned with CamScanner

CH 32. At ph lV, aHwill be neutraized, as- Option gatobin has gatemavy 23. Protens ke Hemoqlobin has opti ση d heix B- pleated sheet are both dorns 24 The CS Scanned wi op tion optiom CamScanner