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29 Cards in this Set

  • Front
  • Back
DNA replication is needed only for what?
Cell Division
The Cell only needs ____ for the products being made
DNA
Working Copy of a Gene
RNA
Work Floor of a cell
Cytoplasm
Differences between DNA and RNA
Ribose instead of Deoxyribose
Uracil replaces Thymine
Single stranded instead of double stranded
Carries genetic message to be translated into polypeptide
mRNA (messenger)
translator molecule
tRNA
structural component of ribosomes
rRNA
heterogeneous nuclear RNA
hnRNA
RNA is transcribed from....
DNA
If you want an RNA copy of DNA information then you have to use the ____ strand as a template
Opposite
Sense Strand
contains information we want.
gene
coding strand
Template Strand
strand used
non coding strand
nonsense strand
RNA is a perfect copy of the ..... strand
Sense Strand
Upstream
towards 5 prime end of sense strand
Special Sequences of bases
signal the start of a gene
allow binding of RNA polymerase
Promoters
Prokaryotic Promoters
10 bases and 35 bases upstream
Eukaryotic Promoters
–“TATA” box = -25 box
–“CAAT” box = -75 box
RNA Polymerase I
transcribes rRNA
RNA Polymerase II
mRNA
RNA Polymerase III
tRNA
Steps of Transcription
Initiation
Elongation
Termination
Initiation of Transcription
Binding of RNA Polymerase
Elongation of Transcription
polymerization of RNA nucleotides - makes RNA chain
Rho-independent of Termination in Prokaryotes
Inverted repeat - series of Uracils
RHO - dependent termination in prokaryotes
rho factor - protein (type of helicase)
Transcription termination in eukaryotes
has a termination sequence signal
Nuclease cuts phosphodiester bond in RNA
Exons
expressed sequences
coding portion
Introns
intervening sequences
do not carry information for polypeptide
need to be removed