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Which base is found in RNA but not in DNA? A. adenine B. guanine C. uracil D. cytosine
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Step 1:
I'll solve this step by step:

Step 2:
: Understand the Bases in Nucleic Acids

The four bases found in nucleic acids are: - Adenine (A) - Guanine (G) - Cytosine (C) - Thymine (T) in DNA - Uracil (U) in RNA

Step 3:
: Compare DNA and RNA Base Composition

- DNA contains: $$A$$, $$G$$, $$C$$, and $$T
- RNA contains: A, G, C, and U

Step 4:
: Identify the Unique Base

The key difference is that RNA uses uracil ($$U$$) instead of thymine ($$T$$) found in DNA.

Step 5:
: Select the Correct Answer

By comparing the options: A. Adenine - found in both DNA and RNA B. Guanine - found in both DNA and RNA C. Uracil - found ONLY in RNA ✓ D. Cytosine - found in both DNA and RNA

Final Answer

C. uracil is the base found in RNA but not in DNA.