Multiple Choice
Which molecule is described as a complex molecule containing the genetic information that makes up the chromosomes?
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7. DNA and Chromosome Structure
DNA Structure
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Which of the following correctly describes the structural difference between DNA and RNA?
A
DNA contains uracil, while RNA contains thymine.
B
DNA is usually single-stranded, while RNA is usually double-stranded.
C
DNA is composed of amino acids, while RNA is composed of nucleotides.
D
DNA contains deoxyribose sugar, while RNA contains ribose sugar.
Verified step by step guidance1
Recall the basic structural components of nucleic acids: both DNA and RNA are polymers made up of nucleotides, which consist of a sugar, a phosphate group, and a nitrogenous base.
Identify the sugar component in each nucleic acid: DNA contains deoxyribose sugar, which lacks one oxygen atom compared to ribose sugar found in RNA.
Examine the nitrogenous bases: DNA contains thymine, whereas RNA contains uracil instead of thymine.
Consider the strand structure: DNA is typically double-stranded forming a double helix, while RNA is usually single-stranded.
Evaluate the given options against these facts to determine which statement correctly describes the structural difference between DNA and RNA.
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