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GCSE Biology Paper 1 (9-1 Exams)

Cell Dna Chromosome Growth Replication Cycle Dividing Spread

Front What happens during the Growth and Replication in the cell cycle?
Back
  1. In a cell that's not dividing, the DNA is all spread out in long strings.
  2. Before it divides, the cell has to grow and increase the amount of subcellular structures such as mitochondria and ribosomes.
  3. It then duplicates its DNA - so there's one copy of each chromosome for each new cell. The DNA is copied and forms X-shaped chromosomes. Each "arm" of the chromosome is an exact duplicate of the other.

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