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Genetics and heredity — Question 19

QCAA 2021, Paper 1 · 1 mark

Q19 · 2021 · Paper 1Unclassified1 mark

QUESTION 19

What is the role of DNA polymerase in DNA replication?

(A) breaking the hydrogen bonds that hold the complementary bases of DNA together

(B) adding complementary nucleotide bases to the exposed DNA strands

(C) sealing the sequence of DNA into two continuous double strands

(D) joining RNA primers to the lagging strand of DNA

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