SME
Grade 9 Science · Problem type
DNA replication
Use this for “How does base pairing let a cell copy its DNA before it divides?”
Put in order
Put the steps of DNA replication in order.
1
?
2
?
3
?
4
?
Assumptions
•
Each old strand is a template: A pairs with T and G with C, so the new strand’s order is fixed.
•
Replication is semiconservative: each new DNA molecule keeps one old strand.
•
In the pictures the old strands are dark and the new ones lit.
Topic check
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