Bio 9D: Wednesday, 2.16.11 Title: Using DNA to Make Proteins (Day 1) Homework: Read pages 302-306 in the textbook. Take notes on: Important vocab words How does the genetic code work? What are the steps of translation? Silent Do Now: (in NB w/ title and date) How do DNA, RNA, and proteins all relate to each other? How is the function of RNA different from the function of DNA? Today’s Objectives: Describe the major differences between DNA and RNA Explain the purpose of the three types of RNA Explain the steps of transcription
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Bio 9D: Wednesday, 2.16.11 Title: Using DNA to Make Proteins (Day 1)
Bio 9D: Wednesday, 2.16.11 Title: Using DNA to Make Proteins (Day 1). Homework: Read pages 302-306 in the textbook . Take notes on: Important vocab words How does the genetic code work? What are the steps of translation? Silent Do Now: (in NB w/ title and date) - PowerPoint PPT Presentation
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Bio 9D: Wednesday, 2.16.11Title: Using DNA to Make Proteins (Day 1)
Homework: Read pages 302-306 in the textbook. Take notes on:
Important vocab words How does the genetic code work? What are the steps of translation?
Silent Do Now: (in NB w/ title and date) How do DNA, RNA, and proteins all relate to each other? How is the function of RNA different from the function of DNA?
Today’s Objectives: Describe the major differences between DNA and RNA Explain the purpose of the three types of RNA Explain the steps of transcription
GENE EXPRESSION:USING DNA TO MAKE PROTEINS
PHA Biology 9Moretti and Dickson
A DAY IN THE LIFE OF THE CELL
Ribosome
s
: :B
l oo
d S
t re
am
: :
Cytoplasm
Vesicles
(“bubbles” that
transport
proteins)
Nucleus
DNA
(Holds genetic information)
RNA
(Copies genetic from DNA and carries it to the Ribosome to make
proteins)
Protein could go to membrane to be released into blood stream
Golgi
Apparatus
(Modifies and shapes the protein)Protein
being formed
at Ribosom
e
Cell
Mem
bran
e(transport
s and
packages
proteins)
E.R.
Released into blood
stream and used as
hormone or o
ther
bodily structu
re
ProteinRibosome
RNA
Overview: Using DNA to Make Proteins
DNA RNA Protein
Trait• Stays in the
nucleus• Copies itself
and gets passed on to new cells
• Holds instructions for making proteins
• Made in the nucleus and goes to the cytoplasm
• Uses DNA instructions to make proteins
• Used as body structures (muscle, bone, skin, hair), enzymes, transporters, hormones, etc.
• Observable characteristic• “Who you are”
[Leave 4-5 lines of space above this, and write it big!]
Overview: Using DNA to Make Proteins
DNA RNA Protein
Trait
Transcription: The process of making RNA by copying DNA
Translation: The process of using info in RNA to make proteins
Objectives for Class:• Describe the purpose and major steps of transcription• Describe the purpose and major steps of translation
Differences between DNA and RNA
Deoxyribose sugar
Double strand (forms a helix)
Bases: A, T, G, C
Ribose sugar Single strand (can
form different shapes)
U instead of T(A, U, G, C)
DNA RNA
Objectives for Class:• Describe the major structural differences between DNA and RNA• Differentiate between structure and function differences between the types of RNA
Base Pairing between DNA and RNA
DNA RNAA ------ UT ------ AC ------ GG ------ C
Objectives for Class:• Describe the major structural differences between DNA and RNA• Differentiate between structure and function differences between the types of RNA
Transcription: Copying DNA into RNA
mRNA (the orange strand)
DNA (the red & green strands)
Objectives for Class:• Describe the major structural differences between DNA and RNA• Differentiate between structure and function differences between the types of RNA
Overview: A DNA gene is copied into RNA Occurs in the nucleus
Steps: 1. RNA Polymerase separates (unzips)
DNA strands2. RNA Polymerase makes RNA by
matching complementary nucleotides with the DNA strand
3. mRNA leaves nucleus and DNA winds back up!
Final Result: mRNA copy of a gene
mRNA
Objectives for Class:• Describe
Transcription
Objectives for Class:• Describe the purpose and major steps of transcription• Describe the purpose and major steps of translation
Video link: 17_13ProteinSynthesis.mpg
Are we now ready to make proteins? What do we need besides instructions?
Needed for making proteins: Amino acids (protein building-blocks) Ribosome (to connect the amino acids into
a protein chain)
Bio 9D: Thursday, 2.17.11Title: The Genetic Code
Homework: Finish the Decoding Worksheet if you don’t finish in class.
Silent Do Now: (NOT in notebook – on handout) Answer the questions on the half-page handout!
Today’s Objectives: Use a DNA sequence and transcribe it into an RNA
sequence Use the Genetic Code to translate RNA into a protein
Trade papers & correct your partner’s Do Now
1. mRNA’s job = carry a copy of DNA’s instructions to the ribosome to make a protein
2. Transcription = copying DNA into RNA3. RNA sequence: A U G C A U G C A4. Amino acid = monomer of proteins. You
put a lot of them in a chain to make a protein.
5. Codon = 3-letter word on mRNA. Each codon stands for one amino acid in the protein chain.
Today’s Agenda: Do Now Explanation of the Genetic Code
Follow along with the examples on the worksheet!
Decoding Worksheet
Reading The Genetic Code The letters in the wheel
are mRNA codons Start in the middle! This is the first letter in
the codon
Move to the middle ring (2nd letter in the codon)
Then go to the outer ring of letters (3rd letter in the codon)
Outermost ring = amino acids!
Reading The Genetic Code: ExamplesFollow along with the
examples in your packet!
Example 1: CAG
1st base = C 2nd base = A 3rd base = G
Therefore theamino acid is…
Glutamine!
Example 2: GUU
Valine
Reading The Genetic Code: Longer ExampleExample 3:
GCCAGCUAG Step 1: Break
it into 3-letter sections (codons)
GCC AGC UAG
Step 2: Decode each codon
GCC = Alanine
AGC = Serine UAG = STOP
(end of protein sequence)
1
2
3
Today’s Agenda: Do Now Explanation of the Genetic Code Decoding Worksheet: Work
quietly with your partner at your table to finish the rest of the packet
Finish it for HW if you don’t finish in class.
Bio 9D: Friday, 2.18.11Title: Using DNA to Make Proteins (continued)
Homework: Finish the Computer-Based Transcription & Translation Lab if you don’t finish in class.
Silent Do Now: (NOT in notebook – on handout) Get a lab handout Silently read the first two paragraphs In the space next to the Key Words, write a quick definition
of transcription and translation
Today’s Objectives: Use the Genetic Code to make a protein Analyze amino acid sequences to determine the shape of a
protein Analyze how changes in DNA (mutations) affect proteins
Computer Lab:Transcribe and Translate a Gene
Get a laptop Follow the instructions to complete the
lab Then complete Part 2 on a separate
sheet of paper
When most people are finished or during 2nd period, we will watch a video
Seats At Back TablesWork alone or with your partner but do not talk/wander across tables!
Carlheb Kayla
Jackson JoasDyaniCourtney
Rayoni CelesteHannahNicholas
Christine DavnysOwenWarren
Miguel MarceloLorreno
SamanthaNekeylaTrae Loveng
Bio 9D: Monday, 2.28.11Title: RNA and Translation
Homework: Two paragraphs on transcription and translation (in your notebook – see assignment sheet for details)
Silent Do Now: Get an assignment sheet and a Do Now sheet Get started on the Do Now, then use your notes
to help answer all the questions Today’s Objectives:
Explain the purpose of the three types of RNA Explain the steps of transcription and translation
Overview: A DNA gene is copied into RNA Occurs in the nucleus
Steps: 1. RNA Polymerase separates (unzips)
DNA strands2. RNA Polymerase makes RNA by
matching complementary nucleotides with the DNA strand
3. mRNA leaves nucleus and DNA winds back up!
Final Result: mRNA copy of a gene
mRNA
Objectives for Class:• Describe
Transcription
Objectives for Class:• Describe the purpose and major steps of transcription• Describe the purpose and major steps of translation
Three Types of RNA: Messenger RNA (mRNA) -
Carries a copy of protein-making instructions to the ribosome
Every 3 letters is a codonthat stands for one amino acidto make the protein
Three Types of RNA: Transfer RNA (tRNA) –
Carries amino acids to the ribosome
Contains anticodons that match up with mRNA codons to put amino acids in the correct order
Three Types of RNA: Ribosomal RNA (rRNA) –
Part of the ribosome (helps bond amino acids together)
t RNA
mRNA
t RNA
Ribosom
e
Making Proteins at the Ribosome
Objectives for Class:• Describe
Growing Protein
Anticodon
Codon
Amino Acid
Objectives for Class:• Describe the purpose and major steps of transcription• Describe the purpose and major steps of translation
Translation
Objectives for Class:• DescribeObjectives for Class:• Describe the purpose and major steps of transcription• Describe the purpose and major steps of translation
mRNA strand
Growing protein chain
Ribosome
Transcription and Translation: Video
Objectives for Class:• Describe the purpose and major steps of transcription• Describe the purpose and major steps of translation
Transcription and Translation Video: 17_13ProteinSynthesis.mpg
Translation Details Overview:
The gene sequence in mRNA is translated into a chain of amino acids that forms a protein
Occurs at the ribosome Steps:
1. mRNA enters the ribosome2. tRNA molecules bring amino acids to the
ribosome 3. tRNA anticodons match with mRNA
codons to put amino acids in the right order According to the Genetic Code
4. Ribosome connects the amino acids into a long chain
Final Result: A polypeptide (protein)
Transcription & Translation
Objectives for Class:• Describe
Transcription
Translation
Homework: Two paragraphs on transcription and
translation See assignment sheet for details
Bio 9A/9D: Tuesday, 3.1.11Title: Genetic Mutations Day 1 – Types of Mutations
Homework: Finish up through Example #4 in the Genetic
Mutations packet
Do Now: (on the Genetic Mutations packet) Answer Preview Questions #1-3
Today’s Objective: Describe the major differences between
substitution and frame-shift mutations
Gene Mutations Activity: Part I Review
What is a Genetic Mutation? A change in the base-pair sequence of DNA
The three types of point mutations: substitution (switch one DNA nucleotide
for another) insertion (add an extra nucleotide into the
DNA sequence) deletion (leave out one nucleotide in the
DNA sequence)
Objectives for Class:• Describe the major differences between substitution and frame-shift mutations
Genetic Mutations Activity Complete Part II of the Genetic Mutations
packet (Examples #1-4) Finish for HW if you don’t finish in class Analysis Questions are not due tomorrow
but will be due later in the week – start them now if you have time!
Work quietly with ONE partner sitting near you (we will not have groups bigger than 2!)
Objectives for Class:• Describe the major differences between substitution and frame-shift mutations
Bio 9A/9D: Wednesday, 3.2.11Title: Genetic Mutations
Homework: Study for tomorrow’s QUIZ by answering the study guide
questions (see back of assignment sheet)
Silent Do Now: (in notebook w/ title & date) What is a genetic mutation? Based on the packet from yesterday, what is the
difference between a substitution mutation and a frame shift mutation?
What are two things that result in a frame shift? Today’s Objective:
Describe the major differences between substitution and frame-shift mutations
Today’s Agenda (As a class) Review Examples #1-4 from
the Mutations packet (On your own) Answer the Analysis
Questions at the end of the Mutations packet
(On your own) Begin studying for tomorrow’s quiz by answering the study guide questions on the back of the assignment sheet – finish this for HW!