Multiple Choice
In the context of nucleic acids, ATP (adenosine triphosphate) is best classified as which type of biomolecule?
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1. Introduction to Biochemistry
Nucleic Acids
Multiple Choice
Which pentose sugar is a component of ATP (adenosine triphosphate)?
A
2-deoxyribose
B
Ribose
C
Fructose
D
Glucose
Verified step by step guidance1
Recall that ATP (adenosine triphosphate) is a nucleotide composed of three main parts: a nitrogenous base (adenine), a sugar, and three phosphate groups.
Identify the type of sugar present in ATP. Since ATP is a ribonucleotide, the sugar must be a pentose sugar with a hydroxyl group on the 2' carbon.
Understand the difference between 2-deoxyribose and ribose: 2-deoxyribose lacks an oxygen atom on the 2' carbon, while ribose has a hydroxyl group (-OH) at this position.
Recognize that ATP contains ribose because it is a ribonucleotide involved in energy transfer and cellular metabolism, unlike DNA nucleotides which contain 2-deoxyribose.
Conclude that among the options given, ribose is the correct pentose sugar component of ATP.
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