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RNA

RNA. Structure Differences: 1. Instead of being double stranded, RNA is a single stranded molecule. (ss) 2. The sugar in RNA is ribose. It has one more oxygen. 3. Has four nitrogenous bases. Three are the same as DNA; adenine, guanine, and cytosine.

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RNA

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  1. RNA • Structure Differences: • 1. Instead of being double stranded, RNA is a single stranded molecule. (ss) • 2. The sugar in RNA is ribose. It has one more oxygen.

  2. 3. Has four nitrogenous bases. Three are the same as DNA; adenine, guanine, and cytosine. • Instead of thymine, RNA has Uracil. No T’s but U’s, so if there is an adenine it will pair with uracil.

  3. Function • RNA is the bridge between genes found in the nucleus and ribosomes that make proteins in the cytoplasm. • Remember the mantra!! • RNA is mobile and moves from the nucleus to the cytoplasm.

  4. Information in DNA for a protein (a gene!) is copied into RNA. This piece of RNA leaves the nucleus and moves to ribosomes in the cytoplasm. • This RNA copy of a gene is called messenger RNA. m-RNA for short. • This process is called transcription.

  5. Types of RNA • m-RNA = messenger RNA. Codes for a protein. • t-RNA = transfer RNA. Converts a 3 nucleotide segment of RNA into an amino acid • r-RNA = ribosomal RNA. Used to make ribosomes.

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