What components make up the backbone of a DNA molecule?
Understand the Problem
The question is asking about the components that form the backbone of a DNA molecule. The options given include different combinations of nucleic acid components, and the goal is to identify which combination is correct.
Answer
Deoxyribose and phosphate groups.
The final answer is H: Deoxyribose and phosphate groups.
Answer for screen readers
The final answer is H: Deoxyribose and phosphate groups.
More Information
DNA's backbone is specifically made up of alternating sugar (deoxyribose) and phosphate groups, forming a helix while the nitrogenous bases pair in the center.
Tips
A common mistake is confusing the backbone components with the nitrogenous bases (purines and pyrimidines) which form the 'rungs' of the helical structure.
Sources
- Understanding the DNA Backbone - Varsity Tutors - varsitytutors.com
- Phosphate Backbone - National Human Genome Research Institute - genome.gov
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