Question

test your knowledge of how dna replication works by matching the enzyme to its function.

1 gyrase
2 ligase
3 dna polymerase iii
4 primase
5 helicase
6 dna polymerase i

match each of the options above to the items below.

unzips the dna double helix
synthesizes rna primers
removes rna primers, replaces with dna bases
adds bases to growing dna chain

Explanation:

Match helicase to its function

Helicase (5) unwinds and unzips the DNA double helix by breaking hydrogen bonds between complementary bases.

Match primase to its function

Primase (4) synthesizes short RNA primers to provide a 3'-OH group for DNA polymerase.

Match DNA polymerase I to its function

DNA polymerase I (6) removes RNA primers via 5' to 3' exonuclease activity and replaces them with DNA nucleotides.

Match DNA polymerase III to its function

DNA polymerase III (3) synthesizes the new DNA strand by adding complementary nucleotides to the growing 3' end.

Answer:

No.	Problem	Answer
2	synthesizes RNA primers	4 (Primase)
3	removes RNA primers, replaces with DNA bases	6 (DNA polymerase I)
4	adds bases to growing DNA chain	3 (DNA polymerase III)