Explain the processes of transporting a T-cell across a membrane. Draw a diagram of this process...
Explain the processes of transporting a T-cell across a membrane. Draw a diagram of this process
Explain why asymmetry is important in a lipid bilayer.
Homework Answers
T cell is a type of lymphocytes that plays a central role in cell mediated immunity.
T cells are mobilized when ever they encounter a cell such as dendritic or b cell that has digested an antigen fragments bound to its MHC molecules_the MHC antigen complex activates t cell receptor_t cell secretes cytokine_will destroy the infected cell
Assymetry in lipid bilayer
Because of the charge difference between the leaflets ,a functional assymetry is generated in the lipid bilayer which is therefore very important to maintain the cell homeostasis and for proper cell functioning.
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Explain the processes of transporting a T-cell across a
membrane. Draw a diagram of this process...
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....
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:
5. What is the free energy change in transporting an uncharged molecule across the membrane of...
5. What is the free energy change in transporting an uncharged molecule across the membrane of a cell from 10 M to 10 M? Is an input of free energy required for this transport? (5 points) 6. What is the free energy cost of pumping Ca out of a cell when the cytoplasmic concentration is 0.9 uM, the extracellular concentration is 1.5 mM, and the membrane potential is -70mV at a temperature of 25°C? What is the free energy cost...
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...
What are the factors influencing the fluidity and phase transition temperature of a membrane? How is...
What are the factors influencing the fluidity and phase transition temperature of a membrane? How is the Ras protein anchored to the cell membrane? How lipid molecules influence membrane curvature formation? Which lipid molecules give preference to formation of different curvatures on membrane? Why facilitated transport across membrane is a saturable process? How do small hydrophobic molecules cross a membrane? Which lipids form/maintain the liquid-ordered raft structures in the cell membrane? How does the pancreatic lipase cleave triglycerides? How do...
13) Draw a schematic diagram of a cell membrane. Be sure to label the exterior of...
13) Draw a schematic diagram of a cell membrane. Be sure to label the exterior of the cell, interior of the cell, a membrane protein, a cholesterol molecule and a phospholipid molecule. (6 pts)
Question 18 (6 points, 1 point for each correct answer): Match the following processes (designated I,...
Question 18 (6 points, 1 point for each correct answer): Match the following processes (designated I, II, or III) that represent various types of transport across a biological membrane with the statements designated A-D: 1. Water diffusion through the lipid bilayer of the biomembrane. II. Glucose transport via the glucose transporter in the plasma membrane. III. Pumping of protons across the lysosome membrane by a proton pump similar to the ATP-synthase complex. Write down your answers in the blank space...
11. Discuss/explain/draw what both active and passive transport are and the details of those transport processes...
11. Discuss/explain/draw what both active and passive transport are and the details of those transport processes in the cell. Include the types of active (3) and passive (3) transport methods and how materials move across the cell membrane including details of what is moved and how. (10 pts)
rane is a flexible barrier that surrounds and contains the cytoplasm of the cell. It is...
rane is a flexible barrier that surrounds and contains the cytoplasm of the cell. It is composed of a phospholipid bilayer, in which are embedded various proteins, cholesterol, and attached carbohydrate groups. To help you review plasma membrane struc- ture, label Figure 2.3 with the terms provided below. Carbohydrate Protein 2 Carbohydrate Lipid Pore Integral (transmembrane) proteins 4- Polar head (hydrophilic) Fatty acid tails (hydrophobic) Polar head (hydrophilic) היות חם Cytosol 5 Peripheral proteins Figure 2.3. The plasma membrane 1....
QUESTION 3 For each of the following cellular processes identify cell membrane modifications that are involved,...
QUESTION 3 For each of the following cellular processes identify cell membrane modifications that are involved, and provide a single phrase that describes how the cell membrane modification facilitates the identified activity. • Active transport • Tight junctions between cells • Mobility of sperm • Movement of mucous across the surface of cells
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....
5. What is the free energy change in transporting an uncharged molecule across the membrane of a cell from 10 M to 10 M? Is an input of free energy required for this transport? (5 points) 6. What is the free energy cost of pumping Ca out of a cell when the cytoplasmic concentration is 0.9 uM, the extracellular concentration is 1.5 mM, and the membrane potential is -70mV at a temperature of 25°C? What is the free energy cost...
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...
What are the factors influencing the fluidity and phase transition temperature of a membrane? How is the Ras protein anchored to the cell membrane? How lipid molecules influence membrane curvature formation? Which lipid molecules give preference to formation of different curvatures on membrane? Why facilitated transport across membrane is a saturable process? How do small hydrophobic molecules cross a membrane? Which lipids form/maintain the liquid-ordered raft structures in the cell membrane? How does the pancreatic lipase cleave triglycerides? How do...
13) Draw a schematic diagram of a cell membrane. Be sure to label the exterior of the cell, interior of the cell, a membrane protein, a cholesterol molecule and a phospholipid molecule. (6 pts)
Question 18 (6 points, 1 point for each correct answer): Match the following processes (designated I, II, or III) that represent various types of transport across a biological membrane with the statements designated A-D: 1. Water diffusion through the lipid bilayer of the biomembrane. II. Glucose transport via the glucose transporter in the plasma membrane. III. Pumping of protons across the lysosome membrane by a proton pump similar to the ATP-synthase complex. Write down your answers in the blank space...
11. Discuss/explain/draw what both active and passive transport are and the details of those transport processes in the cell. Include the types of active (3) and passive (3) transport methods and how materials move across the cell membrane including details of what is moved and how. (10 pts)
rane is a flexible barrier that surrounds and contains the cytoplasm of the cell. It is composed of a phospholipid bilayer, in which are embedded various proteins, cholesterol, and attached carbohydrate groups. To help you review plasma membrane struc- ture, label Figure 2.3 with the terms provided below. Carbohydrate Protein 2 Carbohydrate Lipid Pore Integral (transmembrane) proteins 4- Polar head (hydrophilic) Fatty acid tails (hydrophobic) Polar head (hydrophilic) היות חם Cytosol 5 Peripheral proteins Figure 2.3. The plasma membrane 1....
QUESTION 3 For each of the following cellular processes identify cell membrane modifications that are involved, and provide a single phrase that describes how the cell membrane modification facilitates the identified activity. • Active transport • Tight junctions between cells • Mobility of sperm • Movement of mucous across the surface of cells
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