Nucleic acids 85 Nucleic Acid 69 Nucleic Acids 35 Proteins 28 Metabolism-- Nucleic acids 22 Enzymes 20 DNA 19 Biochemistry 18 DNA (Deoxyribo Nucleic Acid) 18 Lipids 14 Nucleic acid 14 Biology 13 Enzymology 13 Molecular biology 11 Nucleic acid research 11 Carbohydrates 10 NUCLEIC ACIDS 10 Synthesis 10 Photosynthesis 9 RNA 9 nucleic acid 9 DNA (Deoxyribo Nucleic Acid)-- Genomes-- Genes 8 Cytology 6 Genes 5 Phenolics 5 Protein 5 RNA (Ribo Nucleic Acid) 5 Vitamins 5 nucleic acids 5 Amino acid sequence 4