Multiple Choice
Which nitrogenous base is found in RNA but not in DNA?
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7. DNA and Chromosome Structure
RNA
Multiple Choice
Which of the following best describes RNA?
A
A double-stranded nucleic acid containing deoxyribose and thymine that serves as the primary long-term genetic storage molecule
B
A polymer of amino acids linked by peptide bonds that acts as an enzyme to replicate nucleic acids
C
A usually single-stranded nucleic acid containing ribose and uracil that can function in gene expression (e.g., mRNA, tRNA, rRNA)
D
A lipid-based molecule that forms cell membranes and stores genetic information in its phosphate heads
Verified step by step guidance1
Identify the key characteristics of RNA by recalling its chemical structure and biological roles.
Recall that RNA is typically single-stranded, unlike DNA which is double-stranded.
Note that RNA contains the sugar ribose, whereas DNA contains deoxyribose.
Remember that RNA uses the nitrogenous base uracil instead of thymine, which is found in DNA.
Understand that RNA functions primarily in gene expression, including messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA), rather than long-term genetic storage.
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