Inside the Nucleus - DNA

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Presentation transcript:

Inside the Nucleus - DNA The Heart of the Brain Inside the Nucleus - DNA DNA is Packaged into Structures Called Chromosomes

DNA Replication

DNA Replication Replication = DNA copies itself exactly (Occurs within the nucleus) Any mistake in copying = mutation DNA mutation = chromosomal mutation

Basic Facts of DNA Replication 1. Complementary base pairing makes replication possible C - G A - T

Basic Facts of DNA Replication 2. One side of DNA molecule is a template for making the other side (strand)

Process of DNA Replication Uncoil & unzip DNA molecule Enzyme (-ase) breaks weak Hydrogen Bond between bases

Process of DNA Replication 2. Enzyme brings in complementary N-bases DNA Replicase

Process of DNA Replication 3. Insert N-bases

Replication in actiom C - G A - T

Each new DNA molecule contains one old strand & one new strand