BIOL 200 Protein Synthesis Questions And Answers Latest Updates
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Course
BIOL 200
Institution
BIOL 200
BIOL 200 Protein Synthesis Questions And Answers Latest Updates
Genetic code ANS specifies which amino acids will be used to build a protein
pre-tRNA processing ANS Transcribed by RNA pol 3 then processed to yield mature tRNA with CCA 3' ends / stem loop
1. 5' end sequence is removed
2. ...
BIOL 200 Protein Synthesis Questions And Answers
Latest Updates
Genetic code ANS specifies which amino acids will be used to build a protein
pre-tRNA processing ANS Transcribed by RNA pol 3 then processed to yield mature tRNA with
CCA 3' ends / stem loop
1. 5' end sequence is removed
2. Short intron removed
3. CCA added on 3' end
4. Extensive modification of internal bases (new nucleotides)
Aminoacyl-tRNA synthetase ANS each is specific to an amino acid
- will help bind one amino acid to one of several tRNAs
The aminoacyl tRNA synthetase interacts with the coordinate tRNA ANS through recognition of
anticodon and aspects of acceptor stem of tRNA
What is used to form the high energy ester bond between the amino acid and its tRNA? ANS
ATP
What does it mean to say that a tRNA is charged? ANS It is covalently linked to an amino acid
What is the most abundant type of RNA in the human cell? ANS rRNA (80% of total RNA in the
cell)
Pre-rRNA transcription units ANS arranged in repetitive clusters
, - if you take an rDNA cluster and put it somewhere else, enough to build an entire organelle within
the nucleus
- all rRNA transcription takes place within the nucleolus
pre-rRNA is transcribed by ANS RNA Pol 1
pre-rRNA is transcribed in the ANS Nucleolus
rRNA folds into ANS conserved stem loop structures
- due to functional role of RNA, step loop structure is highly conserved among thousands of species
Pre-Initiation Complex ANS small subunit with some of its associated factors with special tRNA
- small subunit is floating around cytoplasm with association factors (eukaryotic initiation factrs:
EIF)
Bacteria: large subunit is ____ S and is composed of ANS 50S: 23 S rRNA + 5 S rRNA +
proteins
Bacteria: small subunit is ____ S and is composed of ANS 30S: 16 S rRNA + proteins
Bacteria: small + large subunits gives a ____ S ribosome ANS 70S
Eukaryote: large subunit is ___ S and is composed of ANS 60S: 28 S rRNA + 5.8 S rRNA + 5 S
rRNA + proteins
Eukaryote: small subunit is ___ S and is composed of ANS 40S: 18S rRNA + proteins
Eukaryote: small + large subunits gives a ____ S ribosome ANS 80 S
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