Which of the following RNA has abnormal purine bases:: (A) tRNA, (B) mRNA, (C) rRNA, (D) 16S RNA
Answer is A. t RNA has unusual bases such as Dihydrouracil (DHU), pseudouridine, hypoxanthine. Ref: Textbook of Biochemistry By DM Vasudevan, 3rd Edition, Pages 355-6 ; Lippincott Biochemistry, Pages 379, 344