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H420 for first assessment in 2017 biology a a level specification ocrorg uk/alevelbiologya a level in biology a ii introducing a level biology a (from september 2015) this specification allows teachers to adopt a flexible approach to the delivery of a during the cell cycle, genetic information is copied and. Cycles in biology a cycle is a series of events repeated in the same order cycles are a major aspect of biology which occurs in a ecosystem, plants and.