Final answer:
The correct difference between DNA and RNA is that DNA is not spliced, while certain types of RNA are spliced in eukaryotic cells.
Step-by-step explanation:
The correct option that describes a difference between DNA and RNA molecules is (c) one type is spliced in eukaryotic cells, but the other is not. DNA molecules remain in the nucleus and are not spliced, while certain types of RNA, such as pre-mRNA, undergo splicing to remove introns before they can be used to produce proteins.
The other options (a and b) are incorrect because both DNA and RNA are involved in transcription, and RNA can be present in both the cytoplasm and nucleus of eukaryotic cells.
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