Cell structure Biology 7 Cytology 5 Genetics 4 Nucleus 3 Cell reproduction 2 Metabolism 2 Botany 1 Botony 1 Cell 1 Cell behaviour 1 Cell substance 1 Chromosomes 1 Cytolytic viruses 1 Cytoplasmic 1 DNA 1 Enzyme 1 Epidemiology 1 Flowering plants 1 Function 1 Gene action- Development 1 Ion transportation 1 Microbial Genetics 1 Microbial genetics 1 Microbiology 1 Microorganisms,fungi,algae 1 Microscopy 1 Mutation 1 Objective test 1 Plant physciology 1