Multiple Choice
What are the main differences between DNA and RNA?
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15. Gene Expression
Introduction to Types of RNA
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In which way is RNA different from DNA?
A
RNA is more stable than DNA.
B
RNA has a deoxyribose sugar.
C
RNA contains uracil instead of thymine.
D
RNA is double-stranded like DNA.
Verified step by step guidance1
Understand the basic structure of nucleic acids: DNA and RNA are both nucleic acids composed of nucleotides, which include a sugar, a phosphate group, and a nitrogenous base.
Identify the sugar component: DNA contains deoxyribose sugar, while RNA contains ribose sugar. This difference affects the stability and structure of the molecules.
Examine the nitrogenous bases: DNA contains adenine, thymine, cytosine, and guanine. RNA contains adenine, uracil, cytosine, and guanine. Note that uracil in RNA replaces thymine found in DNA.
Consider the strand structure: DNA is typically double-stranded, forming a double helix, whereas RNA is usually single-stranded, allowing it to fold into various shapes for different functions.
Evaluate the stability: DNA is more stable than RNA due to the absence of the hydroxyl group on the 2' carbon of deoxyribose, which makes RNA more prone to hydrolysis.
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