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Exam (elaborations)

BIO 230 MIDTERM UOFT QUESTIONS WITH ACTUAL ANSWERS

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BIO 230 MIDTERM UOFT QUESTIONS WITH ACTUAL ANSWERS

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Protein folding: ____ proteins help proper folding. and most ____ are HSP (heat shock
proteins)


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chaperons, chaperon




tmRNAs add ____ onto the polypeptide, they act as ___ but with no anticodon-codon
binding.


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alanine, tRNA

,Flip-flop feedback loop (indirect positive)


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B stops A and A stops B




COPII-coated vesicles


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move materials from the ER "forward" to the ERGIC and Golgi complex




Riboswitches


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Short RNA sequence that change conformation when bound by a small
molecule
Some can do transcription attenuation




GTP hydrolysis causes a conformation change in eIF3. true or false?


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False eIF2.

,How are Monomeric GTPases regulated?


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-GEF
-GAP




SRP Directs partially translated protein to the ER:
Ribosome forms a tight seal with the translocator to prevent the diffusion of what?


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Ions and small molecules




When glucose levels are ____, CAMP is ____.


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Low, High




Eukaryotic gene expression is controlled by many ____ and ____.


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repressors and activators

, Regulatory elements can also be found____


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upstream and downstream from the gene




Protein Sorting to the ER: Single Pass 2 and 3


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TM domain is an internal start transfer sequence and is not cleaves
Laterally diffuses into the bilayer
Orientation is determined by amino acids flanking the internal start-transfer
sequence




Chromatin provides an extra mode of regulation
True or False?


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True




membrane protein types


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