Metabolism 291 metabolism 136 Biochemistry 125 Photosynthesis 73 Physiology 51 Metabolism-- Physiology 47 Enzymes 46 Microbiology 35 Nutrition 35 Biology 30 Lipids 29 enzymes 28 Plant cell 26 Plant metabolism 24 photosynthesis 24 Metabolism-- Nucleic acids 22 morphology 22 METABOLISM 21 Energy metabolism 19 Genetics 19 Microbial metabolism 19 Morphology 19 Proteins 18 Photosynthesis-- Metabolism 17 physiology 15 Bioenergetics-- Energy metabolism 14 Metabolism: Clinical and experimental (Journal) 14 viruses 14 Amino acids- proteins 13 Carbohydrate 13