Multiple Choice
Which feature is found only in DNA and not in RNA?
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14. DNA Synthesis
Discovering the Structure of DNA
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Which two components make up the backbone of DNA strands?
A
Ribose sugar and nitrogenous base
B
Ribose sugar and phosphate group
C
Deoxyribose sugar and phosphate group
D
Deoxyribose sugar and nitrogenous base
Verified step by step guidance1
Understand the structure of DNA: DNA is composed of two strands forming a double helix. Each strand is made up of repeating units called nucleotides.
Identify the components of a nucleotide: Each nucleotide consists of three parts: a phosphate group, a sugar molecule, and a nitrogenous base.
Focus on the backbone of DNA: The backbone of DNA strands is formed by the sugar and phosphate components of the nucleotides.
Recognize the specific sugar in DNA: The sugar in DNA is deoxyribose, which is different from the ribose sugar found in RNA.
Combine the components: The backbone of DNA is made up of deoxyribose sugar and phosphate groups, linked together by phosphodiester bonds.
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