1. DNA, RNA, and Transcription

2. What is DNA? Deoxyribonucleic acid n.a. that stores and transmits genetic information from one generation to the next Made of up nucleotides – 3 parts – Deoxyribose sugar – Phosphate – Nitrogen base

3. Nucleotides Adenine (A) Thymine (T) Cytosine (C) Guanine (G) A and G – purines T (U) and C – pyrimidines A is complementary to T C is complementary to G Play Movie – DNA structure

4. DNA Replication Making more DNA Enzyme (DNA polymerase) unzips DNA Complementary DNA nucleotides match up with the lonely nucleotides Enzymes zip the two pieces back together

5. DNA Replication

6. DNA vs. RNA Deoxyribose sugar Double stranded Thymine Ribose sugar Single stranded Uracil

7. Transcription Enzyme (RNA polymerase) unzips DNA RNA nucleotides match up with lonely DNA nucleotides New mRNA breaks away from DNA and leaves the nucleus to the cytoplasm DNA zips back up and stays in nucleus

8. Transcription

9. Genetic Code 3 nucleotides on an mRNA are called a codon Codons tell which amino acids goes where in the polypeptide chain TRANSCRIPTION WITH AN R MAKES RNA

10. Practice Transcribing DNA says: A – T – T – G – C- A – A – G – G RNA says: