Scelta multipla
Which option shows a correctly paired DNA double-stranded segment according to Watson-Crick base-pairing rules?
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7. DNA and Chromosome Structure
DNA Structure
Scelta multipla
In DNA structure, what is the name of the sugar found in the backbone of DNA?
A
Glucose
B
Fructose
C
Deoxyribose
D
Ribose
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Recall that DNA (deoxyribonucleic acid) is composed of a sugar-phosphate backbone and nitrogenous bases.
Identify that the sugar in the backbone of DNA is a five-carbon sugar, which is a key component of nucleotides.
Understand that the sugar in DNA differs from the sugar in RNA by the absence of one oxygen atom on the 2' carbon.
Recognize that the sugar in DNA is called deoxyribose, which means it is a ribose sugar lacking one oxygen atom (hence 'deoxy').
Conclude that among the options given (Glucose, Fructose, Deoxyribose, Ribose), the correct sugar in DNA's backbone is deoxyribose.
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