Question

When both –NH2 and –COOH replace hydrogen atoms on the same carbon atom, a(n) ____ is formed. a. amine c. carboxylic acid b. amino acid d. carbohydrate

Answer 1

`-NH_(2)` represents amine functional group and
`COOH` represents carboxylic acid functional group. When these both functional groups are substituted onto a single carbon atom, then amino acid is formed.

The organic compound consists of
`-NH_(2)` functional group and
`COOH` functional group with a side chain is said to be an amino acid.

A: amine group is
`-NH_(2)`.

C: carboxylic acid group is
`COOH`

B: amino acid represents
`-NH_(2)` functional group and
`COOH` functional group which are substituted onto a single carbon atom.

D: carbohydrate: the general formula of carbohydrate is
`(CH_(2) O)_(x)`.

Hence, amino acid is the correct answer.