First year

• Draw an RNA nucleotide


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• DNA (Deoxyribonucleic acid) 


  a biological macromolecule that carries hereditary information in a cell.
• RNA (Ribonucleic acid)

  a class of nucleic acids characterized by the presence of the sugar ribose and the pyrimidine uracil

  
• Nitrogenous base

  nitrogen-containing molecules having the chemical properties of a base that are components of nucleotides.