A scientist replicated DNA in a test tube. To do this, they mixed an enzyme with identical DNA fragments into a solution containing free DNA nucleotides.
Name the enzymes used in this DNA replication and state their function.
Explain the role of the free DNA nucleotides.
State two features of DNA and explain how each one is important in semi-conservative replication.
The diagram below shows the replication fork during semiconservative replication. The arrows show the directions in which each new DNA strand is being produced.
Use your knowledge of enzymes and DNA structure to explain why the arrows point in opposite directions.
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