What is the primary role of DNA polymerase I during replication?
Correct answer: A. DNA proof‑reading
- A. DNA proof‑reading
- B. DNA repair
- C. Unwinding
- D. Annealing
Explanation
DNA polymerase I has 3′ → 5′ exonuclease activity allowing proofreading and correction of errors in the new strand.
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About Chromosomes
Chromosomes are DNA-protein structures that carry genes and become visible during cell division. Coverage includes chromatin, centromeres, sister chromatids, homologous chromosomes, chromosome number, and the distinction between diploid and haploid cells, with links to DNA replication, mitosis and meiosis.
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