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Which of the following is a key structural feature of a DNA molecule?
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7. DNA and Chromosome Structure
DNA Structure
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The structure of RNA differs from DNA in that:
A
RNA contains the sugar ribose, while DNA contains deoxyribose.
B
RNA is always double-stranded, while DNA is always single-stranded.
C
RNA is found only in the nucleus, while DNA is found only in the cytoplasm.
D
RNA contains the base thymine, while DNA contains uracil.
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Identify the key structural components of nucleic acids: the sugar, the nitrogenous bases, and the strand structure.
Recall that DNA contains the sugar deoxyribose, which lacks one oxygen atom compared to ribose, the sugar found in RNA.
Understand that RNA typically contains the base uracil instead of thymine, which is found in DNA.
Recognize that DNA is usually double-stranded forming a double helix, whereas RNA is usually single-stranded.
Note the cellular locations: DNA is primarily found in the nucleus, while RNA can be found both in the nucleus and cytoplasm.
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