1. DNA Showdown! Write your answer on your whiteboard Do not show your neighbor!! DO NOT yell out the answer!! Wait for me to tell you when it’s time to show your answer

2. Name the 3 parts of a nucleotide 1.Sugar (Deoxyribose) 2.Phosphate 3.Nitrogen Base

3. Name the four nitrogen bases and match them with their complementary pair A-T C-G

4. True or False The sugar in DNA is Glucose FALSE!! It is Deoxyribose – (for the D in DNA!)

5. What type of BOND holds together the nitrogen bases in the 2 DNA strands? Hydrogen bonds

6. Name the enzymes used in DNA Replication Hint: There are 2 you need to know! 1.Helicase 2.DNA Polymerase

7. What are the jobs of the enzymes Helicase and Polymerase during replication? Helicase – Unzips the 2 strands at the Hydrogen bonds Polymerase – Adds free nucleotides to the new DNA strands

8. True or False? The sugar and phosphates are the subunits of DNA that carries the “genetic code”? False! The genetic code is carried in the nitrogen bases. These subunits are in different sequences for everyone!

9. If there is 20% Cytosine in DNA, then what’s the percentage of Adenine?

10. In your own words, write the steps of DNA replication 1.Helicase unzips the two DNA strands breaking the hydrogen bonds 2.DNA Polymerase adds new free floating nucleotides 3.Now you have 2 new DNA strands!

11. What does “semi-conservative” mean when talking about DNA? Semi-conservative means that DNA is replicated using a template, or parent, strand. One strand is from the original DNA and the other is from the newly made strand. This helps to ensure accurate replication.