Multiple Choice
The four nitrogenous bases commonly found if DNA are:
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4. Biomolecules
Nucleic Acids
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Which of the following lists represents the chemical components of a nucleotide?
A
A nitrogenous base, an amino acid, and a pentose sugar
B
A nitrogenous base, an amino acid, and a phosphate group
C
A nitrogenous base, a fatty acid, and an amino acid
D
A series of nitrogenous bases, a nucleic acid backbone, and a hexose sugar
E
A nitrogenous base, a phosphate group, and a pentose sugar
Verified step by step guidance1
Understand the structure of a nucleotide: A nucleotide is the basic building block of nucleic acids, such as DNA and RNA. It consists of three main components.
Identify the three components of a nucleotide: These are a nitrogenous base, a pentose sugar, and a phosphate group.
Clarify the role of each component: The nitrogenous base can be one of adenine, guanine, cytosine, thymine (in DNA), or uracil (in RNA). The pentose sugar is either deoxyribose (in DNA) or ribose (in RNA). The phosphate group links the nucleotides together in a chain.
Analyze the given options: Compare each option to the known components of a nucleotide. Look for the option that includes a nitrogenous base, a pentose sugar, and a phosphate group.
Select the correct option: The correct list of components for a nucleotide is 'A nitrogenous base, a phosphate group, and a pentose sugar'.
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