Multiple Choice
Which nitrogenous bases are found in DNA?
31
views
7. DNA and Chromosome Structure
DNA Structure
Multiple Choice
In DNA structure, what is the name of the pentose sugar found in the backbone of DNA?
A
2-deoxyribose
B
Fructose
C
Ribose
D
Glucose
Verified step by step guidance1
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 pentose sugar, meaning it has five carbon atoms.
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 RNA is ribose, which has a hydroxyl group (-OH) on the 2' carbon, while DNA has 2-deoxyribose, which lacks this oxygen (hence 'deoxy').
Conclude that the pentose sugar in the backbone of DNA is called 2-deoxyribose.
Related Videos
Related Practice
