Multiple Choice
Which of the following is a difference between DNA and RNA?
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15. Gene Expression
Introduction to Types of RNA
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Which of the following is a key difference between DNA and RNA?
A
DNA is single-stranded while RNA is double-stranded.
B
RNA has a deoxyribose sugar while DNA has a ribose sugar.
C
DNA is found only in the cytoplasm while RNA is found only in the nucleus.
D
RNA contains uracil instead of thymine.
Verified step by step guidance1
Begin by understanding the basic structures of DNA and RNA. DNA (Deoxyribonucleic Acid) is typically double-stranded, forming a double helix, while RNA (Ribonucleic Acid) is usually single-stranded.
Examine the sugar components of DNA and RNA. DNA contains deoxyribose sugar, whereas RNA contains ribose sugar. This difference in sugar is crucial for their structural differences.
Consider the location of DNA and RNA within a cell. DNA is primarily located in the nucleus, while RNA can be found in both the nucleus and the cytoplasm, facilitating protein synthesis.
Focus on the nitrogenous bases present in DNA and RNA. DNA contains adenine, thymine, cytosine, and guanine. RNA contains adenine, uracil, cytosine, and guanine. The key difference here is that RNA contains uracil instead of thymine.
Conclude by identifying the correct statement based on the differences discussed: RNA contains uracil instead of thymine, which is a fundamental difference between the two nucleic acids.
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