This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
RNA is present in ? 
Select and explain. 
A. Cytoplasm, B. Nucleus, C. Ribosome, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Ans. is `d' i.e., All of the above mRNA is synthesized from DNA by the process of transcription in the nucleus. After formation mRNA transpo out of the nucleus into cytoplasm. t-RNA is also synthesized in nucleus and is transpoed to cytoplasm. Protein synthesis (translation) occurs in ribosomes, and requires both mRNA and tRNA. rRNA is present in ribosomes. rRNA is synthesized in nucleolus Thus, RNA can be found in - Nucleus Cytoplasm Ribosome Nucleolus