Multiple Choice
Which of the following statements about the 5' end of a polynucleotide strand of RNA is correct?
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15. Gene Expression
Introduction to Types of RNA
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Which of the following is a difference between RNA and DNA?
A
RNA has deoxyribose sugar while DNA has ribose sugar.
B
RNA is more stable than DNA.
C
RNA is double-stranded while DNA is single-stranded.
D
RNA contains uracil instead of thymine.
Verified step by step guidance1
Identify the structural components of RNA and DNA. RNA contains the sugar ribose, while DNA contains the sugar deoxyribose.
Understand the stability of RNA and DNA. DNA is generally more stable than RNA due to its double-stranded structure and the presence of deoxyribose.
Recognize the strand structure of RNA and DNA. DNA is typically double-stranded, forming a double helix, whereas RNA is usually single-stranded.
Examine the nitrogenous bases present in RNA and DNA. DNA contains adenine, thymine, cytosine, and guanine, while RNA contains adenine, uracil, cytosine, and guanine.
Conclude that the key difference is the presence of uracil in RNA instead of thymine, which is found in DNA.
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