How many amino acids are used to build proteins in the human body?

• A. 20
• B. 25
• C. 15
• D. 30

Answer: (A)

Verified step by step guidance

1. Understand that proteins are made up of amino acids, which are organic compounds that combine to form proteins.
2. Recognize that there are 20 standard amino acids that are used by cells in the human body to synthesize proteins.
3. These 20 amino acids are encoded by the genetic code and are essential for various biological functions.
4. The human body can synthesize some of these amino acids, while others must be obtained from the diet.
5. Remember that while there are more than 20 amino acids in nature, only 20 are used in the genetic coding for protein synthesis in humans.