Send the link below via email or IMCopy
Present to your audienceStart remote presentation
- Invited audience members will follow you as you navigate and present
- People invited to a presentation do not need a Prezi account
- This link expires 10 minutes after you close the presentation
- A maximum of 30 users can follow your presentation
- Learn more about this feature in our knowledge base article
Do you really want to delete this prezi?
Neither you, nor the coeditors you shared it with will be able to recover it again.
Make your likes visible on Facebook?
You can change this under Settings & Account at any time.
Transcript of Exploring DNA
DNA stands for Deoxyribonucleic Acid
Found in the nucleus of all cells
Instructions for all living things (by making proteins)
DNa ---> RNA---> protein
DNA -- transcription---> RNA
RNA--- translation---> Protein
Carry on heritable information (genes)
Shape: double helix
Compared to ladder with rungs
backbone: sugar & phosphate
Adenine, Thymine, Guanine, Cytosine
2 Types: Pyramidines & Purines
Complementary Pairs held by Hydrogen Bonds
Nucleotide= 1 base, 1 phosphorous group, & 1 sugar group
Lets Make Our Own DNA!
2 pieces of licorice:
2 sugar phosphate backbones
Marshmallows: The 4 Bases
9 pink marshmallows
9 yellow marshmallows
9 green marshmallows
9 orange marshmallows
Adenine (A) = Green
Thymine (T) = Pink
Cytosine (C) = Yellow
Guanine (G) = Orange
Our sequence: T A C G T A T G A A A C
Putting it Together
1st Backbone: Put a marshmallow on the toothpick and then
stick the toothpick into the licorice. Then slide the second matching marshmallow onto the toothpick
Remember A with T and C with G!
2nd Backbone: Attach the second piece of licorice to the toothpicks so that it looks like a ladder
-What is DNA?
-Where is it found?
-What is it made up of?
-Why is it important?
Then carefully twist to form a double helix!
1.Helicase : unwinds DNA
2.DNA polymerase III works down leading strand(old strand) up lagging strand(new strand)
a.Pair free nucleotides with complementary bases b.Complementary bases= A&T and G&C
3.DNA is successfully copied
a.original & copy each contains one strand of original DNA
Animation of DNA Replication
A A A