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Step 1:I'll explain the steps of DNA replication in a clear, step-by-step process:
Step 2:: Initiation
- $$DNA_{double~strand} \rightarrow DNA_{separated~strands}
- DNA replication begins at specific sites called origins of replication - The double-stranded DNA molecule unwinds and separates - Enzyme helicase breaks hydrogen bonds between base pairs
Step 3:: Primer Attachment
- $$Primer_{RNA} \rightarrow DNA_{template}
- RNA primase enzyme creates short RNA primers - Primers provide a starting point for DNA polymerase - Primers attach to 3' end of each separated DNA strand
Step 4:: Elongation
- DNA polymerase III adds complementary nucleotides - Proceeds in 5' to 3' direction - Creates two new DNA strands:
Step 5:
Leading strand (continuous synthesis)
Step 6:
- $$Nucleotides \rightarrow New~DNA~Strand
Lagging strand (synthesized in Okazaki fragments)
Step 7:: Primer Removal
- $$Primer_{RNA} \rightarrow Nucleotides_{DNA}
- RNA primers are removed - DNA polymerase I fills gaps with DNA nucleotides
Step 8:: Ligation
- $$Fragments_{DNA} \rightarrow Continuous~Strand
- DNA ligase connects Okazaki fragments - Creates continuous DNA strand
Final Answer
DNA replication occurs through five key steps - initiation, primer attachment, elongation, primer removal, and ligation - resulting in two identical DNA molecules.
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