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Multiple Choice
How can RNA be distinguished from DNA?
A
RNA is more stable than DNA under alkaline conditions.
B
RNA contains uracil instead of thymine.
C
RNA is double-stranded, while DNA is single-stranded.
D
RNA contains deoxyribose sugar, while DNA contains ribose sugar.
Verified step by step guidance
1
Understand the structural differences between RNA and DNA. RNA contains the sugar ribose, while DNA contains the sugar deoxyribose. This difference in sugars is crucial for distinguishing between the two nucleic acids.
Identify the nitrogenous bases present in RNA and DNA. RNA contains the base uracil, whereas DNA contains thymine. This substitution is a key distinguishing feature.
Consider the strand structure of RNA and DNA. Typically, RNA is single-stranded, while DNA is double-stranded. This structural difference affects their function and stability.
Evaluate the stability of RNA and DNA under different conditions. RNA is generally less stable than DNA under alkaline conditions due to the presence of the 2'-hydroxyl group in ribose, which makes RNA more prone to hydrolysis.
Summarize the key differences: RNA contains ribose and uracil, is usually single-stranded, and is less stable under alkaline conditions compared to DNA, which contains deoxyribose and thymine, is double-stranded, and is more stable.