In RNA, thymine is not found. RNA contains the bases adenine (A), cytosine (C), guanine (G), and uracil (U), whereas DNA contains thymine (T) instead of uracil.
So, out of the options given, thymine is the base that is not found in RNA. Guanine, sugar, and phosphate are all components that can be found in RNA.
Here's a breakdown:
1. Thymine (T) is found in DNA, not in RNA.
2. Guanine (G) is one of the four bases found in RNA.
3. Sugar (ribose or deoxyribose) is a component of RNA.
4. Phosphate is also a component of RNA, as it is necessary for the structure of nucleic acids like RNA.
Therefore, the correct answer to the question "Which of the following is not found in RNA?" is thymine.
