Transcript Chapter 11 Academic Chapter 9 Honors

Chapter 11 Academic
Chapter 9 Honors
Text book Notes
12-1
• TRANSFORMATION- process by which 1
strain of bacteria is altered due to the DNA
of another bacteria… (p 288)
• How did we find out that this happens…?
1928 Griffith: British scientist
• Prob? How do bacteria make people sick?
– Specifically the bacteria pneumonia…
• Materials: mice, syringe, diseased bacteria(A),
healthy bacteria(B)
• Results : (what do you think will happen- which
bcateria will kill the mice?)
Harmless
bacteria?
Mice lived
Bacteria A
Mice dies
Flamed
Bacteria A
Mice lived
Why?
Flamed
Bacteria A and
Bacteria B
Mice died
Why?
12-3 RNA & Protein Synthesis
• Synthesis?
– DNA instruction is in code
• ATCCGGTTAAAGGTCCCTCTCTGATCC
CGTATTAAAGTCGATTGACGATGCAGT
GACGATGAAGTCGAAAACCGGTTGTG
TGCCAGTGGCAGTGATG
– Code controls the making of proteins
(which control traits: ex blood type, flower
color )
– QUESTION OF THE DAY:
• How can we decode that message?
Decode Message
• Message needs to go from nucleus to
ribosomes….
DNA vs RNA
DNA- deoxy, ribo, nucleic,
acid
RNA – ribo, nucleic, acid
Double strand
Single strand
Deoxyribose (sugar)
Ribose (sugar)
Nitogen Bases: ATCG
Nitrogen Bases: AUCG
JOB- instructions for all cells JOB: protein synthesis
(needed by body for growth
and repair)
Meet the RNA family …
• mRNA travels to ribosomes
• rRNA is present at the ribosomes
• tRNA- transfers the amino acids to the
ribosomes
Transcription
• Step 1: mRNA goes over to the DNA in
the nucleus, and finds the original strand
• Step 2: mRNA looks only for the section
that it needs to copy
• Step 3: mRNA finds the section and
copies it but in its own complementary
language
• Step 4: mRNA goes to Ribosome with
message
Translation
• Step 1: mRNA arrives at the ribosome,
and rRNA is already there waiting….
• Step 2: mRNA and rRNA show the section
of the code in codons in (mRNA language)
to all the present tRNA’s
• Step 3: the tRNA’s look at their anticodons,
and see which codons they match. They
will match their corresponding codons with
the right amino acid.
• Step 4: After a bunch of amino acids line
up- proteins are made….
• http://www.youtube.com/watch?v=983lhh2
0rGY
• Video transcription and translation
• Video replication
• http://www.youtube.com/watch?v=hfZ8o9
D1tus&feature=related