Multiple Choice
How are the two strands of DNA held together in a double helix?
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7. DNA and Chromosome Structure
DNA Structure
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DNA gets its name from which chemical component?
A
Phosphate group
B
Deoxyribose sugar
C
Adenine base
D
Thymine base
Verified step by step guidance1
Understand that DNA stands for Deoxyribonucleic Acid, which hints at its chemical components.
Recall that DNA is composed of three main parts: a phosphate group, a sugar, and a nitrogenous base.
Identify the sugar in DNA as deoxyribose, which is a five-carbon sugar lacking one oxygen atom compared to ribose in RNA.
Recognize that the name 'Deoxyribonucleic Acid' specifically refers to the presence of the deoxyribose sugar in the backbone of the DNA molecule.
Conclude that DNA gets its name from the deoxyribose sugar component, distinguishing it from RNA which contains ribose sugar.
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