Questions: Just output the content of the question, DO NOT output additional information or explanations.
Transcript text: Just output the content of the question, DO NOT output additional information or explanations.
Solution
Solution Steps
Step 1: Identify the Molecule
The molecule shown in the image is lysine, an essential amino acid. It has an amino group (NH3+), a carboxyl group (COO-), and a side chain consisting of a four-carbon aliphatic straight chain ending in an amino group (NH3+).
Step 2: Determine the Nature of the Side Chain
Lysine has a side chain that is positively charged at physiological pH due to the presence of the terminal amino group (NH3+).
Step 3: Classify the Side Chain
The side chain of lysine is classified as basic because it contains an amino group that can accept a proton, giving it a positive charge.