Question

1. put a box around the atoms on each amino acid in the diagram that will become the h₂o molecule produced by the condensation reaction. 4. there are 22 different amino acids found in nature. two were shown in the diagram above. write one or two sentences to describe how these amino acids are similar and how they are different. use the terms central hydrocarbon, r - group, amine group, and carboxyl group in your description. these amino acids are similar because they all have the same functional groups and bonds. glycine (gly, g) h₂n - ch₂ - cooh cysteine (cys, c) h₂n - ch(ch₂sh) - cooh asparagine (asn, n) h₂n - ch(ch₂conh₂) - cooh phenylalanine (phe, f) h₂n - ch(ch₂c₆h₅) - cooh

Explanation:

For question 3, in a condensation reaction of amino - acids, the - OH from the carboxyl group ($-COOH$) and the - H from the amine group ($-NH_2$) combine to form $H_2O$. For question 4, amino - acids are similar in that they all have a central carbon atom bonded to an amine group ($-NH_2$), a carboxyl group ($-COOH$), a hydrogen atom, and an R - group. They are different in the structure and properties of their R - groups.

Answer:

1. Box the - OH in the carboxyl group and the - H in the amine group of each amino - acid.
2. Similarity: All amino - acids have a central carbon atom bonded to an amine group, a carboxyl group, a hydrogen atom, and an R - group. Difference: They differ in the structure and properties of their R - groups.