Final answer:
The claim that some viruses carry their own tRNA for nucleic acid synthesis is false; instead, certain viruses like retroviruses use an enzyme called reverse transcriptase for reverse transcription.
Step-by-step explanation:
The statement that some viruses carry their own tRNA which serves as the primer required for nucleic acid synthesis is false. Viruses do not typically carry tRNAs because tRNAs are involved in the translation process, not in nucleic acid synthesis. Instead, viruses rely on host cell mechanisms for translation. However, some retroviruses, like HIV, carry their own enzyme called reverse transcriptase, which allows them to reverse transcribe their RNA genome into DNA before integrating it into the host's genome. The process of reverse transcription contradicts the central dogma of molecular biology, which states that DNA is transcribed into RNA, which is then translated into proteins. Therefore, reverse transcriptase, not tRNA, is critical for this process in some RNA viruses.