1) The ribose sugar of RNA is a cyclical structure consisting of five carbons and one oxygen. a) True b) False 2) RNA typically is a double-stranded biopolymer. a) True b) False 3) The four-dimensional structure of RNA is critical to its stability and function. a) True b) False 4) The three most commonly studied are messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA), which are present in all organisms. a) True b) False 5) The ribosome protein subunits are encoded by rRNA and are synthesized in the nucleolus. a) True b) False 6) A sequence of three nitrogenous bases in mRNA specifies incorporation of a specific amino acid in the sequence that makes up the protein. a) True b) False 7) Molecules of tRNA (sometimes also called soluble, or activator, RNA), which contain fewer than 200 nucleotides. a) True b) False 8) There are two types of ncRNAs. a) True b) False 9) RNA, in full ribunucleic acid. a) True b) False 10) Messenger RNA (mRNA), a single strand copied from a DNA strand that acts as its template. a) True b) False

RNA CONCEPTS

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