1. Molecule A below is a protected amino acid. Identify the correct amino acid.

help with questions 2 and 3 please

4: Draw structures from notations or notations from structures, for the following dipeptides. Look up in book for the structures of various amino acids and their names (and notations). (EOCQ 60) Hints for drawing a dipeptide from the specified amino acids. From the given symbols (Ser, Thr, etc), draw the structures for the amino acids in the specified order example, for Ser-Thr, draw Serine first and then Threonine). Then remove the OH from the first amin and one H (from the N atom) on the second amino acid. Then join the remaining fragments; that give the dipeptide formed. In these reactions, H2O is formed as a side product; but it is implied, and you have to show it in your answers. The following equation illustrates that. Here, R and R' are symbolic. In an actual question, you must the actual structures for the amino acids (Table 16.3 in the book). O H || | Н.N— CH— С-N-CH—С-ОН H,N-CH-C–OH + H,N-CH-Ċ–OH R' R. R' (H2O is a sid no need t Amino acid 2 dipeptide Amino acid 1 а. Cys-Ser…

What does the "alpha" indicate in "α-amino acid"?   That the -COOH group is below the plane of the ring. That the amino group is the first group in the compound. That the alpha-carbon has a -NH2 attached. The the amino acid is the dominant form.