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Multiple Choice
How can nucleotides found in DNA be discriminated from those found in RNA?
A
DNA nucleotides have uracil, while RNA nucleotides have thymine.
B
DNA contains deoxyribose sugar, while RNA contains ribose sugar.
C
DNA nucleotides are more stable than RNA nucleotides due to the presence of a hydroxyl group.
D
DNA nucleotides are single-stranded, while RNA nucleotides are double-stranded.
Verified step by step guidance
1
Identify the sugar component in the nucleotide structure: DNA nucleotides contain deoxyribose sugar, whereas RNA nucleotides contain ribose sugar. This is a key distinguishing feature.
Examine the nitrogenous bases present: DNA contains thymine, while RNA contains uracil. This difference in bases is another way to differentiate between the two types of nucleotides.
Consider the stability of the nucleotides: DNA is generally more stable than RNA due to the absence of a hydroxyl group at the 2' position of the sugar, which is present in RNA.
Analyze the structure of the nucleic acids: DNA is typically double-stranded, forming a double helix, while RNA is usually single-stranded, although it can form complex secondary structures.
Review the biological roles: DNA serves as the genetic blueprint in cells, while RNA plays various roles, including acting as a messenger (mRNA), a structural component (rRNA), and a catalyst (ribozymes).