Question

Question: Draw the positively charged, neutral, and negatively charged forms for the amino acid glycine.

Which species predominates at pH 11? Which species predominates at pH 1?

Short answer

Answer

Species predominating at pH 11:

Species predominating at pH 1:

Step-by-step solution

Step-by-Step Solution Step 1: Amino acids

Essential amino acids are taken through the diet.

Glycine

Glycine is the simplest amino acid. Chemical products like herbicides are synthesized with the help of glycine.

Types of glycine

The positive, negative, and neutral types of glycine are given below:

Types of glycine

The species that predominates at pH 11 is given below:

Glycine predominating at pH 11

For a higher value of pH, the isoelectric point results in the neutralization of the positive charge on glycine. It creates a negative charge on glycine. Hence, glycine exists as a negatively charged species at pH 11.

The species that predominates at pH 1 is given below:

Glycine predominating at pH 1

A lower value of pH than the isoelectric point neutralizes the negative charge on glycine. It creates a positive charge on glycine. Hence, glycine exists as a positively charged species at pH 1.