RNA

• RNA


  A polymer of a nucleotide consisting of a ribose, nitrogenous base (adenine, guanine, cytosine, uracil) & phosphate group
• RNA


  • Relatively short polynucleotide chain
  • Single stranded
  • Copies & transfers genetic code from DNA in nucleus to ribosomes
• mRNA (messenger RNA)


  Copy of a gene from DNA
• tRNA (transfer RNA)


  • Only found in cytoplasm
  • Single strand folded to create clover leaf shape which is held in place by H bonds
  • Attaches to specific amino acid & transfers to mRNA
  • Determined by complementary 3 bases between RNA (anticodon) & mRNA
• tRNA creation


  1. Created in nucleus

  2. Leaves nucleus to carry copy of genetic code of gene to ribosome
• DNA is too large to leave nucleus, mRNA is short enough to
• Codon


  Every 3 bases code for specific amino acid
• Protein


  tRNA combines with protein to make ribosomes (bulk of ribosomes)
• Ribosome


  • Large subunit
  • Small subunit
• Thymine base


  Uracil base
• Deoxyribose sugar


  Ribose sugar
• DNA


  Larger (contains entire genome)
• RNA


  Shorter (length of one gene)
• DNA


  Double stranded
• RNA


  Single stranded