Here's a breakdown:
DNA (Deoxyribonucleic Acid)
* Nucleotides: Composed of three parts:
* Deoxyribose sugar: A five-carbon sugar.
* Phosphate group: A negatively charged group.
* Nitrogenous base: There are four types in DNA:
* Adenine (A)
* Guanine (G)
* Cytosine (C)
* Thymine (T)
* Double helix structure: Two strands of nucleotides twist around each other to form a double helix. The strands are held together by hydrogen bonds between the nitrogenous bases:
* Adenine pairs with thymine (A-T)
* Guanine pairs with cytosine (G-C)
RNA (Ribonucleic Acid)
* Nucleotides: Also composed of three parts:
* Ribose sugar: A five-carbon sugar (different from deoxyribose).
* Phosphate group: A negatively charged group.
* Nitrogenous base: There are four types in RNA:
* Adenine (A)
* Guanine (G)
* Cytosine (C)
* Uracil (U) (replaces thymine in RNA)
* Single-stranded structure: RNA is generally single-stranded, although it can fold into complex shapes.
Key Differences
* Sugar: DNA has deoxyribose sugar, while RNA has ribose sugar.
* Base: DNA has thymine (T), while RNA has uracil (U).
* Structure: DNA is a double helix, while RNA is typically single-stranded.
Both DNA and RNA are essential for life. DNA carries genetic information, while RNA plays a role in protein synthesis and other cellular processes.
