Concerning the plasma membrane: A Approximately 80% of the plasma mem- brane mass is composed of phospholipids; B Most of the membrane proteins are extrin- sic proteins and GPI-anchored proteins; |C Membrane proteins are never glycopro- teins; D The composition of the plasma membrane is different from that of endomembranes; E Transmembrane proteins can be transport proteins (ion pumps; canals, transporters,

Concerning the plasma membrane: A Approximately 80% of the plasma mem- brane mass is composed of phospholipids; B Most of the membrane proteins are extrin- sic proteins and GPI-anchored proteins; |C Membrane proteins are never glycopro- teins; D The composition of the plasma membrane is different from that of endomembranes; E Transmembrane proteins can be transport proteins (ion pumps; canals, transporters,

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter3: Cell Structure And Function

Section: Chapter Questions

Problem 11RQ: The tails of the phospholipids of the plasma membrane are composed of _____ and are _____? a....

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Make a tabulation of the following cell organelles with their functions, one disorder related to it with added description; and reference/s.
Compared with the inside of the resting plasma membrane, the outside surface of the membrane isa. positively charged.b. electrically neutral.c. negatively charged.d. continuously reversing, so that it is positive one second and negative the next.e. negatively charged whenever the sodium-potassium pump isoperating
Describe the various types of specialized domains that can be established in the plasma membrane? what is the general consequence of these domains (ie why form them )?
Various types of vesicle coats have been implicated in membrane traffic pathways suchas endocytosis, export from the ER to the Golgi, and transport between Golgicisternae. But so far, no coat has been identified for the secretory vesicles that carrymaterial from the Golgi to the plasma membrane. Do you think such a coat is likely toexist? Justify your answer.
Suppose calcium ion is maintained within an organelle at a concentration1000 times greater than outside the organelle (T = 37 °C). Assuming the membrane is permeable to Ca2+, what is the contribution of Ca2+ to the membrane potential? Which side of the organelle membrane is positive, and which is negative?
The plasma membrane isa. a carbohydrate layer that surrounds groups of cells to protect them.b. a double lipid layer with proteins inserted in it, which surrounds every cell individually.c. a thin sheet of structural proteins that encloses cytoplasm.d. composed of proteins that form a protective barrier.
Explain the importance of the plasma membrane and describe its 4 main component.also describe what type of molecules pass the membrane the fastest and which pass the slowest.
Why the composition of biological membrane varies ? Should it be helpful in membrane physiology ?
If the phosphoglycerolipids constituting the framework of the plasma membrane, these are what give it its functions. There are two main classes of membrane proteins: intramembrane proteins and peripheral protections. What is the distinction between intramembrane and peripheral proteins.
Which of the following best describes an integral membrane protein? A.A protein that has an extracellular domain, a membrane-spanning domain that spans the lipid bilayer of the plasma membrane, and an intracellular domain. B.A protein that peripherally associates with the membrane via ionic interactions another protein embedded in the membrane. C.A protein that is soluble in the cytoplasm. D.A protein that peripherally associates with the membrane via ionic interactions between polar charged amino acids and the polar head groups of the phospholipids in the membrane.
Which of the following regarding microtubules is LEAST correct? A)Microtubules do not have important functions in neurons B)Microtubules are important for anterograde axoplasmic transport C)No answer text provided. D)Microtubules are important for maintaining the structure of the neuron E)Microtubules are important for retrograde axoplasmic transport
What type of membrane proteins did you study in your course. Explain three types, their location and function