during dna replication in e. coli what is the role of dnaa? a. dnaa is a helicas

Question

during dna replication in e. coli what is the role of dnaa?

a. dnaa is a helicase that uses atp to hydrolyze hydrogen bonds and separate dna strands

b. dnaa bends dna, hydrolyzing the hydrogen bonds in the 13-mer region of ecoli

c. dnaa preents reannealing of the separated strands so replication can proceed.

d. dnaa is a region of dna recognized by the replisome where replication is initiated

e. dnaa carries the helicase protein to the open region of dna where hydrolysis and strand separation will occur

Explanation / Answer

B. DnaA bends DNA, hydrolyzing the hydrogen bonds in the 13-mer region of oriC and creating an open complex.

DnaA is a protein which initiates replication. It binds at 9-mer region of oriC. It leads to unwinding at 13-mer region by hydrolyzing of hydrogen bond.

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