Multiple Choice
In the DNA double helix, where are the sugar-phosphate backbones and the nitrogenous bases located?
45
views
7. DNA and Chromosome Structure
DNA Structure
Struggling with Genetics?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which compound is NOT a component of a DNA nucleotide?
A
Adenine
B
Uracil
C
Deoxyribose
D
Phosphate group
Verified step by step guidance1
Recall the basic structure of a DNA nucleotide, which consists of three components: a nitrogenous base, a five-carbon sugar, and a phosphate group.
Identify the nitrogenous bases found in DNA nucleotides: adenine (A), thymine (T), cytosine (C), and guanine (G).
Recognize that the sugar in DNA nucleotides is deoxyribose, a five-carbon sugar lacking one oxygen atom compared to ribose.
Understand that the phosphate group links nucleotides together to form the DNA backbone.
Note that uracil is a nitrogenous base found in RNA nucleotides, replacing thymine, and therefore is NOT a component of DNA nucleotides.
Related Videos
Related Practice
