alleryStart learning →How is RNA built compared with DNA?
AUsually single stranded, from ribonucleotides
BAlways double stranded, from ribonucleotides
CUsually single stranded, from deoxyribonucleotides
DAlways double stranded, from deoxyribonucleotides
Answer & Solution
Correct answer: A. Usually single stranded, from ribonucleotides
1. DNA has a double helix structure, while RNA is usually single stranded.
2. RNA is made of ribonucleotides, which carry ribose rather than deoxyribose.
3. Those ribonucleotides are linked by phosphodiester bonds, the same linkage used in DNA.
4. Deoxyribonucleotides would make the molecule DNA, so the options naming them describe the wrong nucleic acid.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 3 "Biological Macromolecules", section 3.5 Nucleic Acids_
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