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37
Medical
Professional
09/09/2011

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Term
What factor in protein synthesis is the eukaryotic initiation factor that binds met-tRNA (initiator tRNA)
Definition
eIF-2
Term
WHat factor in protein synth in euks binds 40s subunit, anti association factor?
Definition
eIF-3
Term
what factor in protein synth in euks is the cap binding protein, helps place the mRNA on the 40S subunit with the capped 5' end correctly oriented
Definition
eIF-4e
Term
What factor in protein synth in euks is the elongation factor that bring aminoacyl tRNA to the A site?
Definition
EF-1a
Term
What factor in protein synth of euks is the elongation factor (translocase: moves the ribosome along the mRNA)
Definition
EF-2
Term
What ribosomal inhibitor inhibits peptidyl transferase on the prokaryotic large subunit?
Definition
Chloramphenicol
Term
What ribosomal inhibitor inhibits peptidyl transferase on the eukaryotic large subunit?
Definition
Cycloheximide
Term
What ribosomal inhibitor inhibits translocation by the prokaryotic large subunit?
Definition
Erythromycin
Term
What ribosomal inhibitor is an aminoacyl-tRNA analog that causes premature chain termination in prokaryotes and eukaryotes?
Definition
Puromycin
Term
What ribosomal inhibitor causes mRNA misreading and inhibits chain initiation in prokaryotes?
Definition
Streptomycin
Term
What ribosomal inhibitor inhibits the binding of aminoacyl-tRNAs to the prokaryotic small subunit?
Definition
Tetracycline
Term
What ribosomal inhibitor catalytically inactivates eEF-2 by ADP ribosylation?
Definition
Diptheria toxin
Term
What ribosomal inhibitor is a poisonous plant protein that catalytically inactivates the eukaryotic large subunit
Definition
Ricin/Abirin
Term
Prokaryotes have how many release factors in the termination of protein synthesis?
Definition
3
Term
In prokaryotes RF-1 (release factor 1) recognizes what two stop codons?
Definition
UAA and UAG
Term
What two stop codons does RF-2 recognize?
Definition
UAA and UGA
Term
RF-3 stimulates what two things?
RF-3 also has what kind of activity?
Definition
RF-1 and RF-2
GTPase activity
Term
How many release factors do eukaryotes have?
Definition
1 RF it is called eRF-1 and it recognizes all 3 stop codons
Term
What are the 3 stop codons in protein synthesis?
Definition
UAA, UGA, UAG
Term
What is the total number of codons for amino acids?
Definition
61
Term
What is the total number of codons in genetic code? (this includes codons for termination)
Definition
64
Term
What type of mutations involve a change in a single base pair and thus a change in the corresponding mRNA?
Definition
Point mutations
Term
What type of mutations are detected by gene sequence determination? THERE IS NO CHANGE IN THE AMINO ACID SEQUENCE!!!!!
Definition
Silent mutations (shhh lolz!)
Term
What type of mutations arise from a base change that causes incorporation of a different amino acid in the encoded protein? (ex. hemoglobin and sickle cell disease)
Definition
Missense
Term
What type of mutations arise from point mutations that result in the formation or loss of a termination codon. The resulting protein maybe truncated (shorter) or "read through" (lose stop codon and makes it longer).
Definition
Nonsense
Term
What type of mutation is generally much more serious and will cause a change all the way down a DNA sequence, making each codon (or every group of three bases) a different sequence, not just in one point or base like a point mutation, that would only slightly change the sequence of a single codon. A frameshift mutation happens not when a DNA base is simply changed, but when a whole base is added or deleted from the sequence of DNA. Causing the codon sets of 3 bases to be out of frame
Definition
Frameshift mutation
Term
What type of mutation results in the switch of one purine for one pyrimidine?
Definition
Transversion
Term
What type of mutation results in a switch of one purine for a different purine OR one pyrimidine for another pyrimidine?
Definition
Transition
Term
Direction of translation in protein biosynthesis is what?
Definition
amino terminal to carboxy terminal
Term
In protein synthesis it reads mRNA in a what direction?
Definition
5' to 3'
Term
In PROKARYOTES, what makes sure ribosome is very close to the AUG start site (features PURINE rich sequence)
Definition
Shine-Dalgarno Sequence
Term
What start signal to both eukaryotes and prokaryotes have?
What start signal is unique to prokaryotes?
Definition
AUG
GUG
Term
What is the initiator tRNA for proks?
What is the initiator tRNA for Euks?
Definition
N-formylmethionine (fMet)
Methionine
Term
Elongation factors for proks?
Definition
Ef-Tu, Ef-Ts
Term
Elongation factors for euks?
Definition
EF1alpha, Ef1 beta gamma
Term
What are the termination factors for proks?
Definition
RF1, RF2, RF3
Term
How many termination factors do euks have?
Definition
1
eRF
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