Answer
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Step 1:I'll solve this problem step by step, focusing on the molecular structure of DNA.
Step 2:: Identify the Basic Components of DNA
DNA (Deoxyribonucleic Acid) is composed of two key molecular components that form its sides: - Sugar molecules (specifically, deoxyribose) - Phosphate groups
Step 3:: Describe the Sugar Molecule
- The sugar in DNA is $$\beta$$-D-deoxyribose
- It is a 5 -carbon sugar (pentose) - Has a specific molecular structure with a hydroxyl group (-OH) attached to the 3' and 5' carbons
Step 4:: Describe the Phosphate Group
- Phosphate groups are $$PO_{4}^{3-}$$ molecules
- They connect the sugar molecules together - Form phosphodiester bonds between the 3' and 5' carbons of adjacent sugar molecules
Step 5:: Explain the Backbone Formation
- The alternating sugar and phosphate molecules create the DNA molecule's sides (backbone) - This backbone is consistently structured on both sides of the DNA molecule - The structure follows the pattern: sugar-phosphate-sugar-phosphate
Final Answer
The sides of a DNA molecule are made up of alternating deoxyribose sugar molecules and phosphate groups, forming a consistent phosphodiester-linked backbone.
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