Multiple Choice
RNA differs from DNA in that RNA typically:
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7. DNA and Chromosome Structure
RNA
Multiple Choice
RNA differs from DNA in that RNA has which of the following features?
A
Uracil in place of thymine
B
Deoxyribose sugar in place of ribose
C
No phosphate groups in its backbone
D
A double-stranded antiparallel helix as its typical structure
Verified step by step guidance1
Understand the basic chemical differences between RNA and DNA. Both are nucleic acids but differ in sugar components, nitrogenous bases, and structure.
Recall that DNA contains the sugar deoxyribose, while RNA contains ribose. This difference affects the stability and function of the molecules.
Identify the nitrogenous bases in DNA and RNA. DNA has adenine, thymine, cytosine, and guanine, whereas RNA has adenine, uracil, cytosine, and guanine.
Note that RNA typically is single-stranded, not forming a double-stranded antiparallel helix like DNA does.
Recognize that both DNA and RNA have phosphate groups in their backbone, so the absence of phosphate groups is not a distinguishing feature.
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