all TEW ? 8:59 PM 70% Retake Done Rotate S Undo Phospholipids makeup the plasma membrane of cells. Phospholipids consist of a head. tail and a Hydrophobic .. Hydrophilic a. b. Hydrophili . Hydrophobic Hydrophobic. Hydrophobic C. d. Hydrophilic. Hydrophilic
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Can you please answer this question and say the correct letter
The plasma membrane separates the interior of the cell from the extracellular environment. It consists of proteins and lipids. The lipid bilayer is the structural basis of all cell membranes. It is impermeable to all the ions and most of the polar molecules. Proteins embedded in the phospholipid matrix helps in the transporting many substances through the plasma membrane.
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- estion 56 Choose the best option about how cholesterol affects cell membrane fluidity? E yet wered Select one: rked out of O a. Cholesterol increases fluidity at high temperatures and increases fluidity at low temperature Flag question O b. Cholesterol increases fluidity at high temperatures and decreases fluidity at low temperatures. O c. Cholesterol decreases fluidity at high temperatures and decreases fluidity at low temperatures. O d. Cholesterol does not affect the cell membrane fluidity. O e. Cholesterol decreases fluidity at high temperatures and increases fluidity at low temperatures.A phospholipid ________. has both polar and nonpolar regions is made up of a triglyceride bonded to a phosphate group is a building block of ATP can donate both cations and anions in solutionO O 8:12 r cdn.fbsbx.com Receptor-mediated endocytosis A specific receptor protein on the plasma membrane recognizes an extracellular molecule and binds with it. a. Describe the net movement of water by drawing arrows on the diagram. (3 points each) b. Tell whether the solutions are isotonic, hypertonic or hypotonic. Label each picture. (3 points each) c. What kind of transport is shown in the diagram above? Is it active or passive transport? Explain why? (10 points) d. What will happen to cells "A", "B" and "C" after a period of time has passed? (3 points each) 60% water 40% salt The reaction stimulates the membrane to indent and create a vesicle containing the selected molecule. 40% water 60% salt SEAT WORK 40% water LTE 70% water 30% salt 80% water 20% salt Done 70% water 30% salt 70% water 30% salt 9
- 11:28 PM Fri Oct 9 * 29% O T of + : Oct 8, 2020 at 2:10 PM NAME DATE PERIOD Cell Membrane Discovery Big Idea: Cells move materials in and out of their environment through the cell membrane in order to maintain (balance) or (equal state). Composition of the Cell Membrane & Functions: The cell membrane is also called the membrane and is made of a phospholipid The phospholipids have a (water attracting or polar) head and two (water repelling or non-polar) The head of a phospholipid is made of an alcohol and phosphate group, while the tails are 2 chains of fatty acids. Phospholipids can move apart and allow water and other molecules to pass through into or out of the cell. This is known as simple because it does not require and the molecules are moving from areas of concentration to an area of concentration. 1. LABEL a phospholipid bilayer coloring the heads red and the tails blue. 2. LABEL the structure that is hydrophobic and hydrophilic. PHOSPHOLIPID molecule membrane Another type of…三v ng 10. For each statement below, check the type of transport that it correctly describes. There may be more than one correct answer for each. 田 Facilitated Active Simple diffusion Osmosis Diffusion Transport Molecule moves down its concentration gradient Molecule moves through a transmembrane protein Molecules move through the phospholipids directly Molecule moves against its concentration gradient Diffusion of the solvent specifically This process requires energy This process does not require energy IIKindly answer 8, 9, 9 and 108. The biochemical function for the cholesterol present in cell membranes isa. Cell recognitionb. Regulate membrane rigidityc. Impart polarity to the interior membraned. Prevent tight packing of fatty acid chains9. Passive transport mechanism requires both the aid of proteins and the expenditure of cellular energy. While Facilitated and Active mechanism both needs protein in order to transport drugs or ions across a membrane channel. Water transporta. Both statements are INCORRECTb. Neither is CORRECTc. Only the 1st statement is INCORRECTd. Only the 2nd statement is CORRECT9. Which of the following membrane transport mechanism requires both the aid of proteinsand the expenditure of cellular energy?a. Water transportb. Active transportc. Passive transportd. Facilitated transport10. Which of the following types of membrane lipids has steroid structure?a. Cholesterolb. Globosidesc. Triacylglycerold. Sphingoglycolipids
- welv ve.mexeinu Active and passive transport Scenarios Scenario 1 The diagram to the right shows iodine molecules, which are small geor enough to pass through a semi permeable membrane. A. Illustrate which way the molecules will move. B. What type of transport is this? Explain. Scenario 3Explain the impact of unsaturated fatty acid tails, cholesterol, and temperature on membrane fluidity. Model 1 – Phospholipids 5. Refer to Model 1. a.What happens to the shape of the hydrophobic tail in a phospholipid when a double bond is present in the carbon chain? b.Explain why the flexibility (fluidity) of a membrane increases when more of the phospholipids in the layers contain double bonds. c. Why might Arctic fish have a higher concentration of unsaturated fatty acids in their phospholipids?Give typing answer with explanation and conclusion 6. Which chemical properties of phospholipids make them suited to the task of forming cell membranes? Could carbohydrates be used to replace phospholipids as the main component of cell membranes? Explain. Incorporate the following terms into your answer: hydrophobic; hydrophilic; semipermeable.
- messengeRsand transpor and share materes 2. Now think about the bilayer arrangement of phospholipids in cell membranes. Imagine if extracellular and intracellular fluids were made of oil instead of water. How would the phospholipids arrange themselves? A. The hydrophilic heads would be oriented toward the middle, with hydrophobic tails pointing outward. B. The hydrophobic heads would be oriented toward the oil, so outward; the hydrophilic tails would be pointed inward. C. The hydrophobic tails would be oriented inward, while the hydrophilic heads would point outward.Please asap. thanku Question 11 What type of molecule would easily pass through a pure phospholipid membrane (i.e. a membrane that has no ion channels)? Water Na+ Cl- None of these would easily pass through this membraneMultiple Choice Question: Which of the following statements describes a general feature of the lipid bilayer in all biological membranes? O A. The bilayor is stabilized by covalent bonds between neighboring phospholipid molecules. O B. Triacyiglycerols are tho main structural components of each of the two monolayers in the bilayer. OC The polar head groups face inward toward the inside of the bilayet. O D. Individual lipid molecules are free to diffuse laterally in the surface of the bilayer OE Sodium ions and other small charged compounds readily diffuse across the bilayer OF. Individual lipid molecules in one façe (monolayer) of the bilayer readily dilfuse (1lip-fop) to the other monalayer