Which of the following amino acids contains a sulfur atom?

Which of the following amino acids contains a sulfur atom?

Correct Answer: Cysteine

Step 1: Understand what amino acids are. Amino acids are the building blocks of proteins.
Step 2: Learn that amino acids have different side chains, which determine their properties.
Step 3: Identify the amino acids that are commonly known. Some examples are alanine, glycine, and cysteine.
Step 4: Focus on cysteine, which is one of the amino acids.
Step 5: Check the structure of cysteine. It has a side chain that contains a sulfur atom.
Step 6: Remember that cysteine can form disulfide bonds, which are important for protein structure.

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