1. Deoxyribonucleic Acid
Structure of DNA
Deoxyribonucleic Acid

2. DNA
Found in the nucleus of eukaryotic cells
Found in the cytoplasm of prokaryotic cells
DNA coils around histones (proteins)to make chromosomes
A segment of DNA is called a gene

3. DNA Structure
DNA (Deoxyribose nucleic acid) is arranged in a double helix or “twisted ladder.” Scientists Watson and Crick discovered this structure in They received the Nobel Prize for this.

4. Subunits of DNA
DNA is a long molecule made up of subunits called nucleotides (3 parts)
phosphate
five-carbon sugar (deoxyribose)
nitrogen base (there are 4 different nitrogen bases)

5. Nitrogen Bases Purine-double ring of C and N atoms Guanine (G)
Adenine (A)
Pyrimidines-single ring of C and N atoms
Cytosine (C)
Thymine (T)

6. The ladder
The sides of the DNA chain are made of alternating sugars and phosphates. It is referred to as the sugar-phosphate backbone.
The rungs of the “ladder” are made up of the nitrogen bases joined by weak hydrogen bonds. These bonds will only be formed between specific pairs of
bases.

7. Base Pairing Rules Adenine always bonds with Thymine (2 H bonds)
Guanine always bonds with Cytosine (3 H bonds)

8. DNA Vocabulary Foldable
Create a foldable for the words/phrases provided.
FOR THE BASES TELL WHAT IT PAIRS WITH AND IF IT’S A PURINE OR PYRIMIDINE