DNA Replication: Copying the Genetic Code
How DNA Copies Itself
Why Replication Happens
Before a cell divides, it must copy its DNA so that each new cell receives genetic information. This copying process is called DNA replication.
Basic Steps
The DNA double helix opens, each strand serves as a template, and new complementary nucleotides are added. Because base pairing is specific, the sequence can be copied accurately.
Enzymes in Replication
Enzymes help unwind DNA, build new strands, and correct many mistakes. Replication is fast, but it is also highly controlled.
Remember
Complementary base pairing makes DNA replication possible: pairs with , and pairs with .
Why is DNA replication important?
DNA must be duplicated so each new cell gets the needed instructions.
Correct answer: To copy genetic information before cell division
What does a template strand do during DNA replication?
Each original strand guides the formation of a new complementary strand.
Correct answer: It serves as a pattern for building a complementary new DNA strand.
Which base pair is correct in DNA replication?
Base pairing rules are - and -.
Correct answer: A with T