Multiple Choice
In DNA replication, which enzyme is responsible for adding new nucleotides to the growing DNA strand in the direction?
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1. Introduction to Biochemistry
Nucleic Acids
Multiple Choice
In the context of nucleic acids, ATP consists of three main components. Which option correctly lists these components?
A
Adenine, ribose, and three phosphate groups
B
Adenine, deoxyribose, and three phosphate groups
C
Guanine, ribose, and three phosphate groups
D
Adenine, ribose, and three sulfate groups
Verified step by step guidance1
Recall the general structure of ATP (adenosine triphosphate), which is a nucleotide composed of three main parts: a nitrogenous base, a sugar, and phosphate groups.
Identify the nitrogenous base in ATP. ATP contains adenine, which is a purine base, not guanine or any other base.
Determine the sugar component. ATP contains ribose, a five-carbon sugar with a hydroxyl group on the 2' carbon, distinguishing it from deoxyribose which lacks this hydroxyl group.
Recognize the phosphate groups. ATP has three phosphate groups linked in a chain, which are critical for its role in energy transfer.
Combine these components to confirm that ATP consists of adenine, ribose, and three phosphate groups, making this the correct option.
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