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Homework answers / question archive / Arrange the steps of DNA replication in the order that they occur
Arrange the steps of DNA replication in the order that they occur.
single stranded DNA binding proteins bind to each template strand.
DNA polymerase synthesizes DNA.
DNA ligase joins DNA fragments together
Helicase unwinds the DNA double helix.
RNA primers are added.
RNA primers are removed.
What strategies do cells use to ensure that newly replicated DNA does not contain errors? (more than one answer)
DNA polymerase replaces the newly replicated DNA on any chromosomes on which there are mistakes.
Enzymes proofread the DNA after the DNA has been replicated and replace any mismatched nucleotides.
Enzymes repair mistakes in the new DNA double helix after the new double helix separates from the original double helix.
As DNA polymerase synthesizes new DNA, the DNA polymerase finds and corrects misplaced nucleotides
Enzymes remove and resynthesize any misshapen sequences in the DNA prior to replication.
Ans 1.) Arrangement of steps of DNa replication in order wise.
1.- Helicase unwinds the DNA double helix
2.- single stranded DNA binding proteins bind to each template strand.
3.- RNA primers are added.
4.- DNA polymerase synthesizes DNA.
5.- RNA primers are removed.
6.- DNA ligase joins DNA fragments together.
Ans.2) As DNA polymerase synthesizes new DNA, the DNA polymerase finds and corrects misplaced nucleotide.
Enzymes proofread the DNA after the DNA has been replicated and replace any mismatched nucleotide.
Explanation:- DNA polymerases possess 3'-5' exonuclease activity by this activity polymerases knock out wrong nucleotide and then by its 5'-3' polymerising activity adds right nucleotide. This process facilitates fidelity or accuracy of replication .
