Which of the following statements concerning nucleic acids is CORRECT?

Question

Quizplus · Accepted Answer

Cellular DNA is double stranded, consisting of a complementary pairing of nucleotides held together by hydrogen bonds between the nitrogenous bases. RNA, on the other hand, may be single stranded or double stranded, depending on the type of RNA. None of the other options are correct: nucleic acid strands are held together by hydrogen bonds between adjacent nitrogenous bases (not carbohydrates); not all viruses have DNA genomes (some have RNA genomes); the nucleic acid polymer is composed of phosphodiester bonds (not peptide bonds); and there are only two naturally occurring purines in nucleic acids (adenine and guanine).

Which of the Following Statements Concerning Nucleic Acids Is CORRECT