Multiple Choice
How does base pairing differ between RNA and DNA?
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7. DNA and Chromosome Structure
RNA
Multiple Choice
RNA nucleotides contain which set of components?
A
A nitrogenous base, ribose sugar, and an amino acid group
B
A nitrogenous base, ribose sugar, and a phosphate group
C
A nitrogenous base, deoxyribose sugar, and a phosphate group
D
A nitrogenous base and ribose sugar only (no phosphate group)
Verified step by step guidance1
Step 1: Understand the basic structure of RNA nucleotides. Each nucleotide is composed of three main components: a nitrogenous base, a sugar, and a phosphate group.
Step 2: Identify the sugar in RNA nucleotides. RNA contains ribose sugar, which has a hydroxyl group (-OH) attached to the 2' carbon, distinguishing it from DNA's deoxyribose sugar.
Step 3: Recognize the nitrogenous bases in RNA. These include adenine (A), guanine (G), cytosine (C), and uracil (U), where uracil replaces thymine found in DNA.
Step 4: Confirm the presence of the phosphate group. The phosphate group links the sugar molecules of adjacent nucleotides, forming the backbone of the RNA strand.
Step 5: Combine these components to conclude that RNA nucleotides consist of a nitrogenous base, ribose sugar, and a phosphate group.
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