Proteins of the plasma membrane carry out all of the following functions except Select one: a. anchoring the cell to external structures. b. transporting substances across the membrane. C. sending and receiving signals to and from other cells. d. binding to DNA to turn on genes. e. catalyzing chemical reactions at the inner or outer surface of the membrane.

Proteins of the plasma membrane carry out all of the following functions except Select one: a. anchoring the cell to external structures. b. transporting substances across the membrane. C. sending and receiving signals to and from other cells. d. binding to DNA to turn on genes. e. catalyzing chemical reactions at the inner or outer surface of the membrane.

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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Which of the following is not a function of the plasma membrane? (a) transports materials (b) helps structurally link cells (c) has receptors that relay signals (d) anchors the cell to the extracellular matrix (e) manufactures 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.
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.
If a cell could not properly incorporate proteins into its membrane , which of the following functions would be lost? A Synaptic transmission of an action potential B. Diffusion of oxygen from the circulatory system to interstitial fuild. C. Removal of the waste product CO2 from the cell to the interstitial fluid. O D. B And C
Why are ion channels necessary to transport ions into or out of a cell? a. Ions are too large to diffuse through the membrane. b. Ions are charged particles and cannot diffuse through the hydrophobic interior of the membrane. c. Ions do not need ion channels to move through the membrane. d. Ions bind to carrier proteins in the bloodstream, which must be removed before transport into the cell.
Which of the following statements about cellular membranes is/are FALSE? A. Only lipids move Within the membrane, while the proteins are anchored and immobile. B. Membranes are composed of lipids and proteins. C. Substances may be transported across membranes by active transport, facilitated transport or diffusion. D. Membrane proteins are classified as integral or peripheral, upon their function
Which of the following is not the role of the lysosome? a. transporting protein b. digesting damaged organelles c. recycling materials with a cell d. destroying harmful bacteria
If a membrane protein is described as "integral" what does that word refer to? A) super important; plays a key function B) It is bonded to a non protein molecule like a sugar chain or lipid C) It must be an ID tage/ cell recognition protein D) It is strongly integrated/ embedded into the membrane likely spanning the entire width
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
During repolarization of the plasma membrane,a. Na+ diffuses into the cell.b. Na+ diffuses out of the cell.c. K+ diffuses into the cell.d. K+ diffuses out of the cell.
Which of the following is incorrect regarding facilitated diffusion?a. It is a passive process.b. It allows the movement of molecules from areas of lowconcentration to areas of high concentration.c. It may use either channel or carrier proteins.d. It allows the rapid transport of glucose across the membrane.
Which of the following statements is true of membrane proteins? a) They are suspended on the surface of the membrane. b) They are partly embedded in the bilayer c) They span across the bilayer and project from both sides d) Any of these are true, depending on the specific membrane protein.