Which substance is an example of nucleic acid?A. amino acidB. fatC. polysaccharideD. RNA

Step 1: Define the Problem

Identify which substance from the given options is an example of a nucleic acid.

Step 2: Break Down the Problem

Review each option to determine if it is a nucleic acid:

• A. Amino acid
• B. Fat
• C. Polysaccharide
• D. RNA

Step 3: Apply Relevant Concepts

Understand the definitions:

• Nucleic acids are biopolymers essential to all known forms of life, which include DNA and RNA.
• Amino acids are the building blocks of proteins.
• Fats are a type of lipid used for energy storage.
• Polysaccharides are carbohydrates made up of sugar molecules.
• RNA (Ribonucleic Acid) is a nucleic acid involved in protein synthesis and gene expression.

Step 4: Analysis, Verify and Summarize

• Amino acids, fats, and polysaccharides do not fit the definition of nucleic acids.
• RNA is a type of nucleic acid.

Final Answer

D. RNA is an example of a nucleic acid.