Which of the following macromolecules are composed of long chains of amino acids?
BIOLOGY
SAT 2021
Which of the following macromolecules are composed of long chains of amino acids?
- A. Nucleic acids
- B. Proteins
- C. Fats
- D. Carbohydrates
Correct Answer: B. Proteins
Explanation
By process of elimination, lipids and fats cannot be the correct answer-they are synonymous (lipids are also known as fats). Carbohydrates, eg sugars and starches are composed only of carbon, hydrogen, and oxygen. Nucleic acids contribute to DNA and RNA structure and function. The correct answer is proteins, made of long chains of amino acids-amino acids are sometimes called the building blocks of proteins.
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