Which is a function of cyclins? Cyclins are carbohydrates that regulate DNA replication during the mitosis phase of the cell cycle. Cyclins are glycoproteins that repair DNA in the beginning of cell cycle. Cyclins are proteins that regulate when and how often a cell divides.
The correct answer for the question that is being presented above is this one: "Cyclins are proteins that regulate when and how often a cell divides." The function of the cyclins is that it helps regulates during cell division. They are proteins, basically.