Worksheet:
1. Draw the structure of Leucine? Explain why Leucine is considered as a hydrophobic amino acid?
2. Draw the structure of Lysine? Explain why Lysine is considered as a basic amino acid?

Here's what I get

Explanation:

Most of the common amino acids have the general formula RCH(NH₂)COOH.

We call the R groups the side-chains.

They account for the properties of the different amino acids, and we classify the amino acids according to the nature of the side chains.

1. Leucine

Leucine contains a four-carbon sidechain — an isobutyl group.

Alkyl groups are nonpolar and hydrophobic, so leucine is a hydrophobic amino acid.

2. Lysine

Lysine contains four carbon atoms and an NH₂ group.

Amino groups are basic, so lysine is a basic amino acid.