Q: Explain the structure of a biological membrane. Be sure to address how the phospholipids, proteins,…
A: The cell membrane is also known by the name of the plasma membrane. It is a biological membrane that…
Q: In a passive process (passive transport) across a cell's plasma membrane, ______ differences drive…
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Q: Compare the different ways that substances move across membranes
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Q: a potential membrane
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Q: 1. What effect does increasing temperature have on the rate of diffusion? 2. Why must a membrane be…
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Q: FACILITATED DIFFUSION a. What is the importance function of facilitated diffusion in the Human Body?…
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Q: 1) Name TW0 types of molecule present in the plasma membrane. ii) Which of these would be destroyed…
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Q: Explain why the graph obtained for facilitated diffusion when velocity of transport of a given…
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Q: Choose all that aplly that are TRUE for the lipid bilayer: Negative mark is given to incorrect…
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Q: Name the two forms of passive transport
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Q: 1. Passive transport of molecules is determined by the concentrations gradient of such molecules A.…
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Q: Facilitated diffusion differs from active transport in thatfacilitated diffusiona. expends no ATP.b.…
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Q: Explain in detail how amino acids can be transported across the plasma membrane
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Q: substances be transported across a membrane against their concentration gradient?
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Q: 4. The graph below represents two different modes of transport across a biological membrane. One…
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Q: 1. The specific molecule that pass through the cell membrane by osmosis . * 2. What is one…
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Q: 18 Which statement is true for active transportation? a) There is a movement of solute against the…
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Q: MULTIPLE CHOICE. A B C D or Duhh 1) Molecules assisted by a transport protein may cross a selective…
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Q: Draw the different spontaneously formed lipid structures: a. Monolayers and bilayers b. Micelles C.…
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1. Explain why phosphoglycerides are found in lipid bilayer
2. Enumerate and describe the mechanisms of transport across a membrane
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- A driving ion moving through a membrane channel in one direction gives energy to actively transport another molecule in the opposite direction. What is this process called? a. facilitated diffusion b. antiport transport c. symport transport d. primary active transport pump e. contransportWhat 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 membraneA characteristic of carrier molecules in a primary active transport pump is that: a. they cannot transport a substance and also hydrolyze ATP. b. they retain their same shape as they perform different roles. c. their primary role is to move negatively charged ions across membrances. d. they move Na+ into a neural cell and K+ out of the same cell. e. they act to establish an electrochemical gradient.
- Ion pumps and phagocytosis are both examples of ________. a. endocytosis b. passive transport c.active transport d. facilitated diffusionThe 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.1. What are the forces that maintain structural integrity of biological membranes and explain how each force mentioned is formed in membrane lipids.
- 4. The cells making up the epithelial linings of organs that contain liquid, e.g., the bladder and intestines, could be expected to be held together via many ______ in order to provide a waterproof lining. A. tight junctions B. gap junctions C. phospholipids D. intermediate filaments1. In a passive process (passive transport) across a cell's plasma membrane, ______ differences drive the movement; while in an active process, the cell provides ______ to power the transport process. A. concentration, ATP B. ATP, concentration C. differential permeability , driving force D. driving force, differential permeability1. 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.
- 1. Passive transport of molecules is determined by the concentrations gradient of such molecules A. True B. False 2. Plasmalemma is the same as the plasma membrane A. True B. False 3. Phospholipids are always oriented so that their polar head faces the calcium ions A. True B. False 4. Which of these is not a function of the lipid bilayer? A. Changes the temperature B. Provides a flexible matrix C. Imposes a barrier to permeability 5. Which of these is not true about enzymes? A. Most of them are proteins B. Are changed at the end of the reaction C. Can only speed up the rate of the reaction D. Very specific in function E. Work better in specific medium2.What is the difference between storage lipids and membrane lipids? Describe why membranes can only be formed by one type of lipids. 3. What are signaling lipids and antioxidants that play significant role in cell maintenance?1)What is the second type of lipid that plays a major role in the plasma membrane? This lipid does not have polar and nonpolar regions (its not amphiphilic) but plays a critical role in membrane permeability. A)Triglycerdies B) Steriod hormones c) cholesterol 2) In _______________, a single substrate/solute move from a high concentration area to a lower concentration are without the aid of any additional molecules. A) Diffusion B)Facilitated diffusion C) Cotransport 3)Channel proteins require a confirmational change in order to properly function. A) Hydrophilic B) ionic C) Polar
