Multiple Choice
Each amino acid contains a central (alpha) carbon atom attached to a hydrogen atom, along with which three groups?
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3. Amino Acids
Amino Acid Groups
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Which nitrogenous base is present in adenosine triphosphate (ATP)?
A
Guanine
B
Cytosine
C
Thymine
D
Adenine
Verified step by step guidance1
Understand the structure of adenosine triphosphate (ATP). ATP consists of three main components: a nitrogenous base, a ribose sugar, and three phosphate groups.
Recall that the nitrogenous bases in nucleotides are classified into purines (adenine and guanine) and pyrimidines (cytosine, thymine, and uracil).
Identify the nitrogenous base in ATP. The name 'adenosine' in ATP indicates that the nitrogenous base is adenine, which is a purine.
Eliminate the incorrect options. Guanine is another purine but is not part of ATP. Cytosine and thymine are pyrimidines and are not present in ATP.
Confirm that the correct nitrogenous base in ATP is adenine, as indicated by the name 'adenosine' in the molecule.
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