Multiple Choice
In RNA, which sugar is found in the nucleotide backbone?
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7. DNA and Chromosome Structure
RNA
Multiple Choice
RNA is typically composed of how many polynucleotide strands?
A
Four strands (tetrahelix)
B
Three strands (triple helix)
C
One strand (single-stranded)
D
Two strands (double-stranded, like DNA)
Verified step by step guidance1
Understand the structure of nucleic acids: DNA is typically double-stranded, forming a double helix, while RNA is usually single-stranded.
Recall that RNA consists of a single polynucleotide strand made up of ribonucleotides linked by phosphodiester bonds.
Recognize that although RNA can fold upon itself to form secondary structures (like hairpins), it does not form stable double or triple helices as its normal state.
Identify that the question asks about the typical composition of RNA strands, not about unusual or artificial structures.
Conclude that RNA is typically composed of one polynucleotide strand, making it single-stranded.
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