Objective: How does DNA determine the
proteins that get synthesized?
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Take the
page and
divide it
into 6 equal
boxes
Number the
boxes
Notes: Protein Synthesis
1 2
3 4
5 6
Protein Synthesis
“making a protein”
Step 1.
Transcription
Step 2.
Translation
TALK IT OVER:
Look to the picture at
the model of DNA
and RNA, what do
you notice different
about RNA?
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Single strand
Has sugar ribose
Has nitrogen bases: Adenine (A), Cytosine (C),
Guanine (G), Uracil (U)
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Messenger RNA (mRNA) – Carries
the genetic information to make
the protein
Ribosomal RNA (rRNA) – makes
up ribosomes
Transfer RNA (tRNA) – carries
amino acids to the ribosome
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Transcription –DNA is copied into mRNA
Happens in the nucleus
DNA Sequence: A T G C
RNA Sequence:
U A C G
Grab a white board and
maker. Time for some
practice.
Given the following sequence
of DNA; transcribe the mRNA
that would get made.
G C A A C T T A C
C G U U G A A U G
1.
Give the complementary
strand:
A C T G C A T T T
T G A C G T A A A
2.
Transcribe the following
DNA strand:
G C C C A T A A A
C G G G U A U U U
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Translation: mRNA is made
into protein
mRNA read 3 bases at a
time = Codon = 1 amino
acid
Different order in amino
acids = different proteins =
different traits
Without looking at your SNB,
1. What nitrogen base is found
only in RNA
2.
3.
4.
 Uracil
What is molecule is getting
made during transcription?
 mRNA
If there are 15 bases, how
many amino acids would it
could for?
 5 amino acids
What molecule is getting made
during translation?
 Amino acid/protein
Grab a white board and
maker. Time for some
practice.
Given the following sequence
of mRNA; translate the mRNA
that would get made.
G C A A C U U U C
Ala
Phe
Thr
Given the following DNA
sequence, first transcribe, than
translate it:
TAC
CTT
GCC
AUG
GAA
CGG
Met
Glu
Arg
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Answer the following questions within this
box:
How are proteins made from DNA?
Answer in 2-3 complete sentences
Highlight and # the periods
Use the following words: DNA, mRNA,
transcription and translation