Multiple Choice
DNA gets its name from which chemical component?
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7. DNA and Chromosome Structure
DNA Structure
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which two components form the backbone of a DNA molecule?
A
Deoxyribose sugar and nitrogenous base
B
Phosphate group and deoxyribose sugar
C
Adenine and thymine
D
Phosphate group and nitrogenous base
Verified step by step guidance1
Recall the structure of a DNA molecule, which consists of a long chain of nucleotides.
Each nucleotide is composed of three parts: a phosphate group, a deoxyribose sugar, and a nitrogenous base.
Understand that the backbone of the DNA molecule is formed by the repeating units of phosphate groups and deoxyribose sugars linked together.
Recognize that the nitrogenous bases (adenine, thymine, cytosine, guanine) are attached to the sugar and project inward, pairing with bases on the opposite strand.
Therefore, the two components that form the backbone of DNA are the phosphate group and the deoxyribose sugar.
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