Multiple Choice
In the context of DNA structure, which two scientists are most commonly credited with establishing the double-helix model of DNA in 1953?
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7. DNA and Chromosome Structure
DNA Structure
Multiple Choice
In the context of DNA structure, what is the basic monomer unit of DNA called?
A
Amino acid
B
Nucleotide
C
Monosaccharide
D
Fatty acid
Verified step by step guidance1
Understand that DNA is a polymer, which means it is made up of repeating smaller units called monomers.
Recall that the monomers of DNA are molecules that consist of three parts: a sugar, a phosphate group, and a nitrogenous base.
Identify that this three-part molecule is called a nucleotide, which serves as the basic building block of DNA.
Recognize that amino acids are the monomers of proteins, monosaccharides are simple sugars (carbohydrates), and fatty acids are components of lipids, so these are not the monomers of DNA.
Conclude that the correct answer is nucleotide, as it is the fundamental unit that makes up the DNA structure.
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