DNA Replication Gaiser Life Science

Know Why is DNA important? Evidence Page 32 DNA Replication Explain your answer.

Clarifying ?s Information Page 33 Double helix – DNA looks like a twisted ladder or a spiral staircase. – DNA looks like a twisted ladder or a spiral staircase. Structure Bases DNA Replication Nitrogen bases 1. adenine 1. adenine 2. thymine 2. thymine 3. guanine 3. guanine 4. cytosine 4. cytosine pairs Adenine only pairs with thymine. Example: (A+T = AT) or (T+A + TA) Guanine only pairs with cytosine. Example: (C+G = CG) or (G+C = GC)

Clarifying ?s Information Page 33 FYI – Each new DNA molecule will be an exact duplicate of the original DNA molecule. FYI – Each new DNA molecule will be an exact duplicate of the original DNA molecule. DNA Replication Summary: Example: (C+G = CG) or (G+C = GC) Replication process Step 1 – The two sides of DNA unwind and seperate Example: like a zipper unzipping Step 2 – Floating nitrogen bases line up. Example: TA, AT, CG, & GC Step 3 – Bases attach to each other and 2 new DNA molecules are formed. Example: like a zipper zipping up again

Page 33 Clarifying ?s Information DNA Replication Double helix – DNA looks like a twisted ladder or a spiral staircase. – DNA looks like a twisted ladder or a spiral staircase. Structure Bases Nitrogen bases 1. adenine 1. adenine 2. thymine 2. thymine 3. guanine 3. guanine 4. cytosine 4. cytosine pairs Adenine only pairs with thymine. Example: (A+T = AT) or (T+A + TA) Guanine only pairs with cytosine. Example: (C+G = CG) or (G+C = GC) FYI – Each new DNA molecule will be an exact duplicate of the original DNA molecule. FYI – Each new DNA molecule will be an exact duplicate of the original DNA molecule. Replication process Step 1 – The two sides of DNA unwind and seperate Example: like a zipper unzipping Step 2 – Floating nitrogen bases line up. Example: TA, AT, CG, & GC Step 3 – Bases attach to each other and 2 new DNA molecules are formed. Example: like a zipper zipping up again Summary:

This PowerPoint was created from Charlene Shea’s lecture notes by Tim Paterek. It is copyrighted and may not be reproduced outside the Vancouver School District. All pictures came from Google Image Search. To fall within the Fair Use Guidelines, this PowerPoint must be used within the confines of the classroom and may not be published back onto the Internet unless the pictures are removed.