1. RNA and Protein Synthesis

2. Put this presentation into present mode so you can view the videos and animations.

3. Essential Question
What is RNA and what is the purpose of RNA?

4. Review DNA replication: video (0:00-2:50)

5. RNA Structure How are RNA & DNA different?
- contains the sugar RIBOSE (hence RIBOnucleic acid)
- is single stranded not double stranded
- contains coded information for making proteins

6. RNA Structure
- is like a disposable copy of DNA, is a working copy of a part of DNA
- contains Uracil (U) in place of Thymine (T)
- involved in protein synthesis

7. Types of RNA Messenger RNA (mRNA)
carries copies of the instructions for assembling amino acids into proteins…they carry the message

8. Types of RNA Ribosomal RNA (rRNA)
combine with proteins to make up ribosomes (location of protein assembly)

9. Types of RNA
Transfer RNA (tRNA)
transfers the amino acids to the ribosome to become part of the proteins

10. ****continue video**** (2:51-4:45)
Transcription – process in which part of the nucleotide sequence of DNA is copied into a complementary sequence of RNA
****continue video**** (2:51-4:45)
Adenine (DNA and RNA)
Cystosine (DNA and RNA)
Guanine(DNA and RNA)
Thymine (DNA only)
Uracil (RNA only)
RNA polymerase
DNA
RNA

11. The Genetic Code The “DECODER” -read from inside to outside
-used to read RNA
three letter “word” is called a codon
each codon specifies an amino acid

12. The Genetic Code
EXAMPLE:
AGC is the codon for:
SERINE

13. Example: DNA : GAATTAGTCCATACT codons : GAA - - - - TTA GTC CAT ACT
TTA
GTC
CAT
ACT
mRNA :
CUU
AAU
CAG
GUA
UGA
amino acids :
Leucine-
Asparagine-
Glutamine-
Valine-
Stop

14. You Try it! DNA : GACAAGTCCACAATC codons : GAC-AAG-TCC-ACA-ATC mRNA :
CUG-UUC-AGG-UGU-UAG
amino acids :
Leucine-Phenylalanine-Arginine-Cysteine-Stop

15. Translation- decoding of a mRNA message into a polypeptide chain; occurs on ribosomes
(continue video 4:46-6:56)

16. DNA vs. RNA - is the master plan - blueprint - sugar is Deoxyribose
- sugar is Ribose
made of:
a sugar, phosphate, and nitrogen base
- double stranded
- single stranded
- contains A, G, C, T
- contains A, G, C, U
(nucleotide)
- remains in the nucleus
- goes to ribosomes in the cytoplasm

17. Summary Anchor these notes into your folder.
Write 2 questions that start with a “HOW” on each page of notes (all questions visible after anchored in).
Write a 3 sentence summary that answers the essential question.
Bring to Mrs. Caryl for stamps.