Biology 9700 · AS & A Level · Replication and division of nuclei and cells

Replication and division of nuclei and cells — practice question

Which of the following statements about telomeres is correct?

  • AThey allow cells in culture from any age of donor to divide a fixed number of times.
  • BThey are genes which are present on the $5'$ end of every chromosome.
  • CThey are unpaired regions of DNA on the $3'$ end of every chromosome.
  • DThey prevent introns and exons being lost from genes during cell division.

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