Which one is an amino acid?
Correct answer: A. Glycine
- A. Glycine
- B. Acetone
- C. Glucose
- D. Ethanol
Explanation
The correct answer is Glycine, as it is a basic amino acid with both an amino group (-NH2) and a carboxyl group (-COOH) attached to the alpha carbon. The other options are either carbohydrates, ketones, or alcohols, which do not have the defining structure of amino acids.
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About Biological Molecules
The chapter covers water's polarity and biological roles, carbohydrates, lipids, proteins and nucleic acids, including their monomers, bonds, structures and functions. It also distinguishes RNA from DNA and explains conjugated molecules such as glycoproteins, glycolipids and nucleoproteins, which combine organic molecules with a non-protein component.
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