Which of the following accurately describes RNA?

Study for the SACE Stage 2 Biology Exam. Enhance your understanding with quizzes, interactive flashcards, and detailed explanations. Be fully prepared for your exam success!

The statement about RNA being single stranded with ribose sugar accurately describes the structure and composition of RNA. Unlike DNA, which is typically double-stranded and contains the sugar deoxyribose and the nitrogenous base thymine, RNA is primarily single-stranded. It has ribose as its sugar component, which has a hydroxyl (-OH) group on the second carbon atom, differentiating it from deoxyribose, which lacks this hydroxyl group.

In RNA, the nitrogenous bases include adenine, cytosine, guanine, and uracil instead of thymine found in DNA. This structural difference allows RNA to have various forms and functions, such as messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA), each playing critical roles in the processes of transcription and translation during protein synthesis.

The assertion regarding RNA being found only in the nucleus is incorrect because RNA can be found in both the nucleus and the cytoplasm, where it participates in protein synthesis. The options regarding double-stranded RNA with thymine and containing deoxyribose sugar are also incorrect, as they do not match the fundamental characteristics of RNA. The understanding of these features is crucial for grasping the

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