| List I | Functional Group | List II Description |
|---|---|---|
| A | Hydroxyl | I. DNA |
| B | Carboxyl | II. Proteins |
| C | Amino | III. Polar |
| D | Phosphate | IV. Fatty acids |
- Hydroxyl (A - III): Hydroxyl groups are highly polar due to the electronegativity of oxygen.
- Carboxyl (B - IV): Carboxyl groups are a major component of fatty acids.
- Amino (C - II): Amino groups are found in amino acids, which are the building blocks of proteins.
- Phosphate (D - I): Phosphate groups form the backbone of DNA molecules.
In the given pentapeptide, find out an essential amino acid (\(Y\)) and the sequence present in the pentapeptide. 
Choose the correct answer from the options given below:
Given below are two statements for the following reaction sequence: 
Match List-I with List-II. 