In which type of RNA molecule is the unusual nitrogenous base pseudouracil found?

✅Explanation: tRNA (transfer RNA) contains modified bases, including pseudouracil. Pseudouracil is structurally similar to uracil but has an extra nitrogen-carbon bond and may play a role in tRNA's stability.

📌📌Other Options:
-mRNA (messenger RNA): mRNA carries genetic information from DNA to ribosomes for protein synthesis. It primarily contains the standard uracil base.
-rRNA (ribosomal RNA): rRNA is a major component of ribosomes, the structures where protein synthesis occurs. It contains various modified bases.