Transcription
description
Transcript of Transcription
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Transcription
Definitely not Transformation, Transduction or Translocation!
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What is a Gene?
• One Gene – One Enzyme • One Gene – One Polypeptide • One Gene – One RNA transcript
• A GENE IS A SEGMENT OF DNA THAT CODES FOR - - - - - - - - AN RNA TRANSCRIPT!!!!
NOPE !NOPE !
YES !
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Gene
rRNA
Component of Ribosome
tRNA
Carries amino acids to Ribosome
mRNA
Codes for Polypeptide
snRNA
Helps to splice primary transcripts
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Which of the following will get translated?
A only B only
C only
D only A &
B B & C
C & D
A, B, &
C
A, B, C
, & D
0% 0%
70%
0%
10%
0%
10%10%
0%
A. rRNAB. tRNAC. mRNAD. snRNA
1. A only2. B only 3. C only4. D only5. A & B6. B & C7. C & D8. A, B, & C9. A, B, C, & D
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Which of the following are directly involved with translation?
A only B only
C only
D only A &
B B & C
C & D
A, B, &
C
A, B, C
, & D
5%
0%
10%
0%
10%
50%
20%
5%
0%
A. rRNAB. tRNAC. mRNAD. snRNA1. A only
2. B only 3. C only4. D only5. A & B6. B & C7. C & D8. A, B, & C9. A, B, C, & D
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What best represents rRNA?
Red Blue
Green
Brown
74%
11%16%
0%
1. Red2. Blue3. Green4. Brown
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What best represents tRNA?
Red Blue
Green
Brown
0%11%
74%
16%
1. Red2. Blue3. Green4. Brown
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What best represents snRNA?
Red Blue
Green
Brown
0%
85%
0%
15%
1. Red2. Blue3. Green4. Brown
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Life is just an RNA SAMWICHH!
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Hey Check out this basic transcription animation!
• http://www-class.unl.edu/biochem/gp2/m_biology/animation/gene/gene_a2.htm
l
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What did the idiot scribe represent?
RNA primase
RNA polymerase
DNA polymerase
Reverse
transct
riptase
Helicase
11%
84%
0%0%5%
1. RNA primase2. RNA polymerase3. DNA polymerase4. Reverse transctriptase5. Helicase
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What is/are the substrate (s) for RNA polymerase?
ATP, GTP, U
TP, CTP
ATP only
dATP, dGTP, d
CTP, dTTP
ATP, GTP, C
TP, TTP
Amino acids
63%
5% 5%
16%11%
1. ATP, GTP, UTP, CTP2. ATP only3. dATP, dGTP, dCTP, dTTP4. ATP, GTP, CTP, TTP5. Amino acids
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How many RNA polymerases are there?
• THREE• RNA Polymerase I– Transcribes nucleolar genes into rRNA
• RNA Polymerase II– Transcribes genes into mRNA (which eventually
turns into a polypeptide)• RNA Polymerase III– Transcribes genes into tRNA and snRNA
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How does an RNA Polymerase “FIND” a gene to transcribe?
•TRANSCRIPTION FACTORS FIND A TATA BOX ON THE PROMOTER REGION!!!!!!!!!!!!!!!!!!!!
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Check Out the Process in a MovEEE
• http://vcell.ndsu.edu/animations/transcription/index.htm
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What did Sir Spliceolot accomplish?
Cut out d
ifferent DNA s..
.
Cut out d
ifferent RNA se
...
Cut out d
ifferent RNA s..
.
Cut out d
ifferent DNA se
...
10%0%
90%
0%
1. Cut out different DNA sections called introns.
2. Cut out different RNA sections called exons.
3. Cut out different RNA sections called introns.
4. Cut out different DNA sections called exons.
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Why are introns called introns?
They are INTERVENING noncoding sequences found within a gene!
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Why are exons called exons?
They are coding sections of a gene that get EXPRESSED as a component of a protein!
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What really splices out the introns?
Cutterase
Dicerase
Splice
osome
Blitzenase
Rudolphase
5%
16%
5%11%
63%1. Cutterase2. Dicerase3. Spliceosome4. Blitzenase5. Rudolphase
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What really is a SPLICEOSOME?
snRNA
small proteinBIG PROTEIN
snRNPSPLICEOSOME