Final answer:
Guanine (G) and cytosine (C) are the components found in both DNA and RNA.
Step-by-step explanation:
The components that are found in both DNA and RNA are adenine (A), guanine (G), and cytosine (C). Thymine (T) is found only in DNA and is replaced by uracil (U) in RNA. Therefore, the correct answer to the question of which components are found in both DNA and RNA is guanine (G) and cytosine (C).
RNA and DNA both contain the nitrogenous bases adenine, guanine, and cytosine. However, DNA contains thymine while RNA contains uracil instead. Thymine pairs with adenine in DNA, while uracil pairs with adenine in RNA. This difference in base pairing is due to the distinct structure and function of DNA and RNA.