Download DNA to RNA

Bellwork: Draw the graph and answer
the question
• The graph shows the rate of
activity for the enzyme catalase
at different temperatures.
Catalase helps convert hydrogen
peroxide to oxygen and water.
The rate of catalase activity is
directly related to the percent
increase in oxygen.
• Based on the graph, what
conclusions can be made about
the functioning of catalase?
Science Fact of the Day:
An Octopus has three hearts.
CO: I will understand and explain the
process and purpose of transcription.
LO: I will write notes and will create a
mind map about Transcription.
Transcription Preview
Let’s get some things straight…
• Replication- to make an exact copy
–Replication is like making a photocopy
• Transcription- to transfer from one
recording form to another
–Transcription is like taking notes
(same information, different form)
Why bother making copies?
Well…
1. Copies are good to have as a backup—it’d be
bad if something happened to DNA
2. You can just put down the part of the
information you need—shorter/simpler
Think of it like this:
DNA = master copy
RNA = blueprints…you don’t need the
blueprints for the whole house to build the
foundation
Central Dogma
We’re only talking about the first part today 
DNA
RNA
Protein
Transcription (big ideas)
• Is the first step in making a protein (polypeptide)
• Occurs in the nucleus
• DNA is used to make RNA
– RNA is then sent out into the cell to make proteins
– It’s usually just a section of the DNA strand (gene)
that codes for one specific protein
There are three main
differences between
DNA and RNA:
1) The sugar in RNA is
ribose instead of
deoxyribose.
2) RNA is singlestranded.
3) RNA contains uracil
instead of thymine.
Comparing base pairing rules
DNA to DNA
DNA to RNA
CG
GC
TA
AT
C G
G C
TA
A U
Summarize the DNA to RNA base
pairing rules in exactly 8 words.
Messenger RNA (mRNA) carries copies
of instructions from DNA in the nucleus
to the ribosome to make proteins.
Transcription Recap
Practice Replication and Transcription
• We’re going to make a “Protein Synthesis Tri-fold”
• Follow my directions, step by step 
Mind Map Example
• Word bank: lipid, fatty acid, biomolecule, protein,
enzyme, carbohydrate, ring, chain, Nitrogen,
monosaccharide, amino acid, polypeptide
Fatty acid
chain
lipid
ring
nitrogen
monosaccharide
Amino acid
carbohydrate
Biomolecule
enzyme
protein
=
polypeptide
Create your own mind map
Explain connection on the arrows
• Word bank: transcription, nucleus, DNA,
mRNA, gene, adenine, guanine, cytosine,
thymine, uracil, nucleotide, nucleic acid,
helicase, replication
Transcription Model (teacher guide)
• I need a person for A T G T C A at the front of
the room
• I need people to form a complementary DNA
strand
• Who wants to be helicase?
• Now I need people to form a complementary
RNA strand
• DNA polymerase please stand up… 