1. Which of these activities occur in ER? You can select more than one.TranscriptionTranslationrotein foldingA protein glycosylationanulphide bond formationO Addition of mannose6 phosphate5. ER experiences stress when ER protein-folding capacity is overwhelmed.leading to accumulation of misfolded proteins. Which of these factors cancause ER stress?Z Nutrient deprivationHypoxiaPoint mutation in secreted proteinsO loss of calcium homeostasis in ER lumenO smal sized ER7. What are the responses to ER stress?ncrease in the production of chaperonsIncrease in the production of degrading enzymesIncrease in the size of ER7ooptosisO O

Endoplasmic Reticulum- It is the largest single membrane- bound intracellular compartment or…

Answered: 1. Which of these activities occur in…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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32.
3. What 3 types of proteins will have a signal peptide? Where in the cell does translation of these proteins start? Where are they completed? dimont results on translation wh
4e. You also study the expression of 3 different mutants for this gene. For each mutant answer the following: Does this mutation change the sequence of the protein produced? Why or why not? If it does change the sequence of protein be sure to write out the new sequence. If it does not change the protein sequence, what effect (if any) would you expect it to have on expression of the gene? 1 20 ORI 40 60 5..ТТCGAGCTСТСGТCGTCGAGATACGCGATGATATTACTGGTААТАТGGGGATGCАСТАТС..3' 3'...AAGCTCGAGAGCAGCAGCTCTАTGCGСТАСТАТААТGACCATTATAССССТАСGTGATAG..5' * promoter i. Mutant A has a single base pair substitution with the T/A being replaced with C/G base pair at position 35 (position denoted by the * in the sequence above). ii. Mutant B has a 2 G/C pairs inserted between position 19 and 20 (position denoted by the ^ in the sequence above).
1. You are interested in the eukaryotic protein/enzyme Thiolase, which is 200 amino acids in length. Because Thiolase is only active in the peroxisome (an organelle) you know there must be a peroxisomal localization signal sequence in the protein. Sub-cellular Location Construct of GFP protein In order to be able to visualize the Thiolase protein in a cell, you create a fusion Cytosol construct with the gene for Thiolase and the GFP gene for Green Fluorescent Protein (GFP). 200 Thiolase Peroxisome GFP You also make a series of deletions in the 50 200 Peroxisome gene for Thiolase, all fused with the GFP GFP 100 200 gene. Numbers on top of the constructs GFP Peroxisome represent amino acid positions. 125 200 Cytosol GFP You express each construct in a mammalian 150 200 cell and use a microscope to visualize where the Thiolase-GFP protein gets trafficked. cytosol GEP 150 Peroxisome GFP Using the data provided, where must the peroxisomal localization signal sequence be in the Thiolase…
2. You perform a series of experiments on the synthesis of the pituitary hormone prolactin, which is a single polypeptide chain 199 amino acids long. In the first experiment, the MRNA coding for prolactin is translated in a cell-free protein synthesizing system containing ribosomes, amino acids, tRNAs, aminoacyl-TRNA synthetases, ATP, GTP, and the appropriate initiation, elongation, and termination factors. Under these conditions, a polypeptide chain 227 amino acids long is synthesized. In a second experiment, the MRNA is translated in the same cel1-free system to which you have added SRP. In this case, translation stops after a peptide about 70 amino acids long has been produced. In a third experiment, you use the same cell-free translation system to which you have added both SRP and endoplasmic reticulum vesicles, and you find that that the prolactin MRNA now produces a polypeptide that is 199 amino acids long. A) Explain these results.
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3. Differentiate between factors and processes involved in transcription: Recognition of this DNA sequence is [Choose] required for transcription to initiate:. [ Choose ] PROMOTER Occurs when the ribosome reaches a RNA POLYMERASE stop codon on the MRNA TERMINATION INITIATION SITE ENHANCERS The main enzyme responsible for transcribing DNA into RNA is ELONGATION Will increase the efficiency of gene [Choose] expression, but are not essential for transcription. RNA polymerase "walks" along the template strand, adding a [Choose ] matching (complementary) RNA nucleotide to each existing ncleotide. The section of DNA from which the [Choose ) very first 5" RNA nucleotide is transcribed Question 4 1 pts hp 近

1. Describe the process by which an integral membrane glycoprotein goes from mRNA to being an integral membrane protein 2. Describe in detail the initiation of translation in eukaryotes versus prokaryotes. All steps. 3. Compare and contrast gated transport and transmembrane transport of mitochondria. Specific details are required. 4. Compare and contrast regulation of gene expression between prokaryotes and eukaryotes 5. The plasma membrane, as an example, is described as a fluid mosaic. Why? (hint: LOTS of details)
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