Lo 8: Properties of the Plasma Membrane 1) Draw the structure of a phospholipid and label...
Lo 8: Properties of the Plasma Membrane
1) Draw the structure of a phospholipid and label the three parts: Glycerol backbone, fatty acid tails and phosphate head group. Label which regions are hydrophobic and which are hydrophilic. Be able to explain WHY they have the property they do (think of their chemical make up-look it up if you need a reminder).
2) Describe two properties that affect membrane fluidity? Draw a representation of how each property affects membrane fluidity. Explain HOW each affects the fluidity. In your answer, you should be able to explain when the fluidity increases or decreases for each property and explain why it does so (what causes the transition from more fluid to less fluid).
3) Describe the hydrophobic effect and how it effects membrane structure.
4) Describe the properties of molecules that can easily diffuse through the plasma membrane.
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Lo 8: Properties of the Plasma Membrane
1) Draw the structure of a phospholipid and label...
Make a diagram of the fluid mosaic model of the structure of cell membranes. Label: phospholipid...
Make a diagram of the fluid mosaic model of the structure of cell membranes. Label: phospholipid molecules, cholesterol, hydrophilic and hydrophobic portions, proteins, and carbohydrates. Describe the structure, arrangement and functions of membrane lipids, membrane proteins and membrane carbohydrates.
MEMBRANE STRUCTURE AND TRANSPORT ACROSS CELL MEMBRANES 1. An organelle that is characterized by extensive, folded...
MEMBRANE STRUCTURE AND TRANSPORT ACROSS CELL MEMBRANES 1. An organelle that is characterized by extensive, folded membranes and is often associated with ribosomes 2. Label the following diagram Qutsde of cel LE nside of cell 3. List 4 functions of the plasma membrane c. d. 4. Complete the table below with the role cach component of the plasma membrane plays Plasma membrane components Role in the membrane Phospholipid Bilayer Cholesterol Glycopeoteins Glycolipids Protein Receptor Site Protein channel Protein Carrier 5....
1. Draw one string of ten (10) phospholipids. Label the hydrophilic heads and the hydrophobic tails....
1. Draw one string of ten (10) phospholipids. Label the hydrophilic heads and the hydrophobic tails. (3 points) chrohobia hrudiephilic CH₂-CH-CH 2. What are the basic components of one phospholipid molecule? (3 points) 3. Draw a phospholipid bilayer. Label the hydrophilic heads and the hydrophobic tails. (3 points) 4. Cell membranes are made of phospholipid bilayers. Why is it important for there to be both hydrophilic and hydrophobic components of the membranes that surround all of our cells and organelles?...
D) glycosyltransferases E) carboxypeptidase 26. What type of protein secondary structure is characterized as being highly...
D) glycosyltransferases E) carboxypeptidase 26. What type of protein secondary structure is characterized as being highly extensible because of its coiled structure? A B-pleated sheet By double helix a-helix supercoiling local folding 27. The figure above is an example of a: A) Glycerol Sterol - Phospholipid D) Glycolipid E) Sugar 28. Long tails (relative to short fatty acid tails) of lipids that make up plasma membranes increase the viscosity of a plasma membrane due the which of the following? A)...
Diagram and describe the structure of the plasma membranes of animal cells. How is membrane structure...
Diagram and describe the structure of the plasma membranes of animal cells. How is membrane structure related to permeability? Explain the various ways that different substances cross cell membranes. Give an example of something that crosses membranes each way, and explain why this substance must cross membranes by that particular route, and not some other way. [Hint: Your answer should include all the things that are attached to the membrane, the interactions that hold membranes together, what controls membrane fluidity,...
Figure 1 represents a plasma membrane and molecules present on either side. Figure 1. A...
Figure 1 represents a plasma membrane and molecules present on either side.
Figure 1. A model of a plasma membrane demonstrating selective permeability
(a) Describe the biological need for cells to be surrounded by a membrane that is selectively permeable for different materials.
(b) Explain how the model shows selective permeability of the membrane to specific ions.
(c) Describe the characteristics of the phospholipid bilayer that permit small hydrophobic lipid molecules to pass directly across the membrane.
(d)...
The plasma membrane is very important to the cell. a. Draw and describe the structure and...
The plasma membrane is very important to the cell. a. Draw and describe the structure and function of the plasma membrane. b. What is the chemical explanation for the structure of the plasma membrane? c. Diagram and four different transport mechanisms across the membrane, and then compare and contrast the benefits and drawbacks of each mechanism to the cell:
both questions please Describe the fluid- mosaic model of membrane structure. Define all the components and...
both questions please
Describe the fluid- mosaic model of membrane structure. Define all the components and explain why the liquid crystal consistency is important. TT T Arial - 3(120) T E . . 25 Pathep Words QUESTION 5 Why can't larger polar molecules and ions diffuse through the plasma membrane? Explain. Would it be advantageous to the cell if they could? Explain.
A cell membrane consists of a lipid bilayer, which is a double layer of phospholipids. Each...
A cell membrane consists of a lipid bilayer, which is a double layer of phospholipids. Each phospholipid has a hydrophilic phosphate head and a hydrophobic lipid tail. These phospholipids are not chemically bound to one another, but rather maintain their structure due to the fact that the lipid tails do not like water. They're hydrophobic^2. If they all buddy up, then they can all stay dry. (See figure.) One way to deal with this quantitatively is to realize that there...
1. 2 functions of plasma membrane proteins and explain why the specific functions you listed are...
1. 2 functions of plasma membrane proteins and explain why the specific functions you listed are important to a cell. 2. List 2 properties of water and describe how they benefit life. 3.Differentiate between a hypothesis, a guess, and a theory. Explain why it is important for non-scientists to understand how scientists use these terms
MEMBRANE STRUCTURE AND TRANSPORT ACROSS CELL MEMBRANES 1. An organelle that is characterized by extensive, folded membranes and is often associated with ribosomes 2. Label the following diagram Qutsde of cel LE nside of cell 3. List 4 functions of the plasma membrane c. d. 4. Complete the table below with the role cach component of the plasma membrane plays Plasma membrane components Role in the membrane Phospholipid Bilayer Cholesterol Glycopeoteins Glycolipids Protein Receptor Site Protein channel Protein Carrier 5....
1. Draw one string of ten (10) phospholipids. Label the hydrophilic heads and the hydrophobic tails. (3 points) chrohobia hrudiephilic CH₂-CH-CH 2. What are the basic components of one phospholipid molecule? (3 points) 3. Draw a phospholipid bilayer. Label the hydrophilic heads and the hydrophobic tails. (3 points) 4. Cell membranes are made of phospholipid bilayers. Why is it important for there to be both hydrophilic and hydrophobic components of the membranes that surround all of our cells and organelles?...
D) glycosyltransferases E) carboxypeptidase 26. What type of protein secondary structure is characterized as being highly extensible because of its coiled structure? A B-pleated sheet By double helix a-helix supercoiling local folding 27. The figure above is an example of a: A) Glycerol Sterol - Phospholipid D) Glycolipid E) Sugar 28. Long tails (relative to short fatty acid tails) of lipids that make up plasma membranes increase the viscosity of a plasma membrane due the which of the following? A)...
Figure 1 represents a plasma membrane and molecules present on either side.
Figure 1. A model of a plasma membrane demonstrating selective permeability
(a) Describe the biological need for cells to be surrounded by a membrane that is selectively permeable for different materials.
(b) Explain how the model shows selective permeability of the membrane to specific ions.
(c) Describe the characteristics of the phospholipid bilayer that permit small hydrophobic lipid molecules to pass directly across the membrane.
(d)...
both questions please
Describe the fluid- mosaic model of membrane structure. Define all the components and explain why the liquid crystal consistency is important. TT T Arial - 3(120) T E . . 25 Pathep Words QUESTION 5 Why can't larger polar molecules and ions diffuse through the plasma membrane? Explain. Would it be advantageous to the cell if they could? Explain.
A cell membrane consists of a lipid bilayer, which is a double layer of phospholipids. Each phospholipid has a hydrophilic phosphate head and a hydrophobic lipid tail. These phospholipids are not chemically bound to one another, but rather maintain their structure due to the fact that the lipid tails do not like water. They're hydrophobic^2. If they all buddy up, then they can all stay dry. (See figure.) One way to deal with this quantitatively is to realize that there...
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