Here's a breakdown:
DNA (Deoxyribonucleic Acid):
* Double helix: DNA consists of two long, polynucleotide chains that are wound around each other to form a double helix. Imagine two twisted ladders intertwined.
* Structure: Each strand is composed of nucleotides, which are made up of a sugar (deoxyribose), a phosphate group, and one of four nitrogenous bases: adenine (A), guanine (G), cytosine (C), and thymine (T).
* Pairing: The two strands are held together by hydrogen bonds between the bases. Adenine always pairs with thymine (A-T), and guanine always pairs with cytosine (G-C).
* Function: DNA stores and transmits genetic information from one generation to the next.
RNA (Ribonucleic Acid):
* Single-stranded: RNA is typically single-stranded, meaning it has only one polynucleotide chain.
* Structure: Similar to DNA, RNA is composed of nucleotides, but its sugar is ribose instead of deoxyribose. Additionally, RNA contains uracil (U) instead of thymine (T).
* Types: There are several types of RNA, each with a specific function:
* Messenger RNA (mRNA): Carries genetic information from DNA to ribosomes, where proteins are synthesized.
* Transfer RNA (tRNA): Transfers amino acids to the ribosomes during protein synthesis.
* Ribosomal RNA (rRNA): Forms part of the ribosomes, which are the sites of protein synthesis.
* Function: RNA plays various roles in protein synthesis and gene regulation.
In summary:
* DNA has a double helix structure, while RNA is typically single-stranded.
* DNA stores genetic information, while RNA carries genetic information and participates in protein synthesis.
