. Working as an engineer in the R&D section of a biotech industry, you are asked to select a membrane to concentrate a solution containing a protein with a molecular weight of 200 kDa; Fortunately, it has three types of membrane in the cellar: one for MF, one for UF and one for RO. Which one would you choose to perform the required service? Could you establish some characteristics of the chosen membrane

. Working as an engineer in the R&D section of a biotech industry, you are asked to select a membrane to concentrate a solution containing a protein with a molecular weight of 200 kDa; Fortunately, it has three types of membrane in the cellar: one for MF, one for UF and one for RO. Which one would you choose to perform the required service? Could you establish some characteristics of the chosen membrane

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter5: Membranes And Transport

Section: Chapter Questions

Problem 3TYK: The freeze-fracture technique demonstrated: a. that the plasma membrane is a bilayer with individual...

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The freeze-fracture technique demonstrated: a. that the plasma membrane is a bilayer with individual proteins suspended in it. b. that the plasma membrane is fluid. c. that the arrangement of membrane lipids and proteins is symmetric. d. that proteins are bound to the cytoplasmic side but not embedded in the lipid bilayer. e. the direction of movement of solutes through the membrane.
2. Unlike soluble, cytosolic proteins, transmembrane proteins are more difficult to purify, Which of the following substances is most used to help purify a transmembrane protein? a. high salt solution b. sucrose c. detergent d. ethanol e. glucose
The CFTR membrane protein has an alpha helix that spans the membrane. The amino acid sequence of the central portion of this alpha helix, which is embedded within the membrane, is which one of the sequences below? Sequences are provided in the single letter code. a. VVVEVVVVEVVEEEVE b. VVVLVVVVLVVLLLVL c. VVVLVVVVREERRRER d. EEEREEEEREERRRER
1. Researchers have discovered a new membrane protein that has three transmembrane domain αhelixes that span the lipid bilayer. a. If the lipid bilayer is 30 Å thick, what is the smallest number of amino acid residues that can be in each α-helixes for them to be long enough to span the bilayer? b. If one of the three α-helixes is titled at a 32° angle relative to an axis perpendicular to the surface of the lipid bilayer, what is the smaller number of amino acid helixes required for that helix to still span the lipid bilayer? c. How many hydrogen bonding interactions would there be in the smallest possible tilted transmembrane α-helix? d. If the tilted α-helix was a 310 helix instead how many amino acid residues would be required to span the lipid bilayer? How many amino acid residues would be required if it was a π-helix?
1) Identify THREE macromolecules that are components of the plasma membrane in a eukaryotic cell and discuss the structure and function of each.
Transmembrane proteins span the width of the cell membranes. Four types of transmembrane proteins are shown in a section of cell membrane. Although these proteins have different specific functions, they all -- a. help the cell interact with its external environment b. stop chemical reactions within the cell c. synthesize molecules that signal other cells d. remove large waste particles from the cytoplasm of the cell.
A scientist compares the plasma membrane composition of an animal from the Mediterranean coast with one from the Mojave Desert. Which hypothesis is most likely to be correct? The cells from the Mediterranean coast animal will have more fluid plasma membranes The cells from the Mojave Desert animal will have a higher cholesterol concentration in the plasma membranes The cells’ plasma membranes will be indistinguishable The cells from the Mediterranean coast animal will have a higher glycoprotein content, while the cells from the Mojave Desert animal will have a higher lipoprotein content.
1. Explain in detail how amino acids can be transported across the plasma membrane 2. By using the concept of endomembrane system, explain how plasma membrane involves in the protein synthesis of a cell. 3. With suitable examples, compare the structural and functional differences between a fibrous and globular protein. 4. A person suffers from a skin condition and loss of muscle. A doctor suspects the patient has protein deficiency. Justify why the doctor thinks so.
17. The transition temperature of a membrane bilayer is determined directly or indirectly a. the ability of lipid molecules to be packed together b. whether the fatty acid chains of the lipids are saturated or unsaturated c. the extent to which the fatty acid chains of the lipids contain double bonds d. the length of the fatty acid chains. e. All of the above are correct answers.
Can someone please explain in technical detail how all the proteins in the Outer Membrane Proteins (OMP) system work? Thank you
While performing fluorescent microscopy to observe the transport of bulk molecules into a cell a researcher uses a green, fluorescent bulk protein and a red fluorescent dye to stain the cell membrane. If the cell has the ability to transport the bulk proteins into the cell, what would we expect to see in the microscope when the images are merged? What would we expect to see if the cell did not have the ability to transport the bulk protein?
1a-The separation of the parent cell into two daughter cells fails to occur during the process of binary fission. Based on your knowledge of cell constriction in bacteria, what protein may be missing in the system (ie the protein was not expressed)? 1b-You are examining a novel protein and you notice that its final structure is at the secondary level. What type of bonds did you find that lead you to this conclusion? O a. Peptide bonds and hydrogen bonds O b. Covalent bonds and peptide bonds O c. Peptide bonds only O d. Hydrogen bonds only 1c- A peptide bond forms between. O a. The amino group of one amino acid and the carboxyl group of another amino acid. O b. The CH3 group of one amino acid and the carboxyl group of another amino acid. O c. The R groups of two amino acids. O d. A hydrogen of one amino acid and carbon of another amino acid.