Some organisms use single-stranded rather than double-stranded DNA. In these organisms,?

Question

which enzyme would probably not be needed for DNA replication?

Reverse transcriptase
B. DNA polymerase
C. DNA replicase
D. RNA polymerase
E. DNA helicase

Answer 1

Please do your own homework. If not, then here is the answer.

E, DNA helicase. Helicase is used to unwind a double-stranded DNA molecule, but since the organism in question has only one strand, it isn't needed.

Answer 2

E. DNA helicase

DNA helicase is an enzyme that aids in DNA synthesis by 'unzipping' the two strands of a DNA helix so that DNA polymerase can access the DNA to add nucleotides and effect copying.

The function of DnaB helicase is to couple ATP hydroysis with the unwinding of duplex DNA at the replication fork. This action creates two antiparallel DNA single strands. The leading ssDNA polymer is the template for DNA polymerase III holoenzyme. which synthesizes a continuous strand. Even though DNA polymerase is able to travel very fast (~1000 nucleotides/second), the numerous processes involved in lagging strand synthesis means that the overall rate of replication fork movement is slower (~750 nucleotides/second).

Answer 3

E. DNA helciase: this is the enzyme used to break the hydrogen bonds to start DNA replication. If there is only one strand this enzyme isn't needed. Hope this helps!

Answer 4

prokaryotes have single stranded dna mutually as eukaryotes have double. prokaryotes are eg: micro organism. eukaryotes eg: vegetation cells and animal cells RNA polymerase no longer used in DNA replication. in basic terms used for protein systhesis.