The following diagram depicts the topology of a multipass transmembrane protein in the endoplasmic reticulum (ER) membrane. Which set of helices actCytosolNC1 2as stop-transfer signals in this protein?2 3 4 56OA 1,2,3OB. 4. 5. 6OC. 1.3.5D. 2, 4, 6OE1.6ER lumen

In the topology of a multipass transmembrane protein within the endoplasmic reticulum (ER) membrane,…

Answered: The following diagram depicts the…

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

Chapter9: Cell Communication

Section: Chapter Questions

Problem 1ITD

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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.
Figure 4.18 If a peripheral membrane protein were synthesized in the lumen (inside) of the ER, would it end up on the inside or outside of the plasma membrane?
The tails of the phospholipids of the plasma membrane are composed of _____ and are _____? a. phosphate groups; hydrophobic b. fatty acid groups; hydrophilic c. phosphate groups; hydrophilic d. fatty acid groups; hydrophobic
Because they are embedded within the membrane, ion channels are examples of ________. receptor proteins integral proteins peripheral proteins glycoproteins
The RNA components of ribosomes are synthesized in the _____. a. cytoplasm b. nucleus c. nucleolus d. endoplasmic reticulum
In the fluid mosaic model: plasma membrane proteins orient their hydrophilic sides toward the internal bilayer. phospholipids often flip-flop between the inner and outer layers. the mosaic refers to proteins attached to the underlying cytoskeleton. the fluid refers to the phospholipid bilayer. the mosaic refers to the symmetry of the internal membrane proteins and sterols.
Which of the following is a feature common to all three components of the cytoskeleton? They all serve to scaffold the organelles within the cell. They are all characterized by roughly the same diameter. They are all polymers of protein subunits. They all help the cell resist compression and tension.
Which of the following methods of transport is being used to transfer the substance into the cell in the accompanying graph? a. diffusion down a concentration gradient b. osmosis c. facilitated diffusion d. active transport e. vesicular transport f. It is impossible to tell with the information provided.
What is the primary function of carbohydrates attached to the exterior of cell membranes? identification of the cell flexibility of the membrane strengthening the membrane channels through membrane
Put the following structures in order according to the pathway of a secreted protein: a. plasma membrane b. Golgi bodies c. endoplasmic reticulum d. post-Golgi vesicles
What controls the passage of molecules into and out of the nucleus? a. endoplasmic reticulum, an extension of the nucleus b. nuclear pores, which consists of membrane proteins c. nucleoli, in which ribosome subunits are made d. dynamically assembled microtubules e. tight junctions
Figure 16.13 An increase in phosphorylation levels of elF-2 has been observed in patients with neurodegenerative diseases such as Alzheimer’s, Parkinson's, and Huntington's. What impact do you think this might have on protein synthesis?

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The following diagram depicts the topology of a multipass transmembrane protein in the endoplasmic reticulum (ER) membrane. Which set of helices act Cytosol N C 1 2 as stop-transfer signals in this protein? 2 3 4 5 6 OA 1,2,3 OB. 4. 5. 6 OC. 1.3.5 D. 2, 4, 6 OE1.6 ER lumen