Do Now: Wednesday, March 19

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Transcript Do Now: Wednesday, March 19

Video
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Transcription (Notes)
 Transcription occurs in
the nucleus
 Step 1: The section of
DNA that has the code
for the protein that is
needed is unwound
 Step 2: RNA
polymerase (enzyme)
uses the DNA to make
a complementary
strand of mRNA
Translation
 Step 1: mRNA carries the
code from the DNA out of
the nucleus to a ribosome in
the cytoplasm


The code is read 3 letters at a
time
The 3-letter groups are called
codons
Translation
 The ribosome reads each codon
 A tRNA with a complementary
anticodon is attached
 Each tRNA molecule with a specific
anticodon carries a specific amino
acid
Translation
tRNA
anticodon
 The ribosome reads each codon
 A tRNA with a complementary
anticodon is attached
Translation
 Each tRNA molecule with a
specific anticodon carries a
specific amino acid
Translation
 The amino acids that are dropped
off by all of the tRNA molecules
are joined together
 The string of amino acids forms a
polypeptide (another word for a
protein)