Homework Answers
§It’s a physical and protective barrier and have selective permeability
§Cell-Cell communication due to presence of carbohydrates
§Involved in cell signaling due to presence of membrane bound receptors
§To supply oxygen for respiration and eliminates toxic waste products such as urea and carbon dioxide
§Regulate solute con. and maintains suitable internal pH. : Maintains homeostasis
§Maintains ion conc. gradients (required for nerve and muscle activity)
§Secretes useful substances such as digestive enzymes and hormones.
§Involved in Pinocytosis and Phagocytosis
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Label the following image with the correct terms to describe the structure and function of a...
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....
Match the component of the membrane to the correct letter on the image. Outside H -...
Match the component of the membrane to the correct letter on the image. Outside H - 8 G WMMWMV F Inside D с B E А A B 1. GIP anchored protein 2. Phospholipid or phospholipid head c D CE 3. glycolipid 4. Sphingolipid 5. Peripheral protein covalently linked to a lipid F H 6. sterol
2) A. Describe the structure of the phosphatidylcholine. B. Explain why phospholipids, and not triglycerides, are...
2) A. Describe the structure of the phosphatidylcholine. B. Explain why phospholipids, and not triglycerides, are the primary component of the plasma membrane 3) Describe the hydrophobic effect and how promotes the formation of vesicles rather than sheets of phospholipids. 4) Define the following terms in relation to how the protein is associated with the plasma membrane: a. Transmembrane protein b. Integral protein c. Peripheral protein d. Anchored membrane proteins
toyer loses its fluidity when it freezes aquaporins can no longer function after freezing. O the...
toyer loses its fluidity when it freezes aquaporins can no longer function after freezing. O the integrity of the lipid bilayer is broken when the membrane freezes. QUESTION 9 What are the membrane structures that function in active transport? peripheral proteins O carbohydrates cholesterol integral proteins cytoskeleton filaments QUESTION 10 Which of the following is true of integral membrane proteins? They are loosely bound to the surface of the blayer They are not mobile within the bayer They lack tertiary...
Determine whether the structure, location, and functions describe proteoglycans, peptidoglycan, glycoproteins, or glycolipids. GlcNAc is N-acetylglucosamine;...
Determine whether the structure, location, and functions describe proteoglycans, peptidoglycan, glycoproteins, or glycolipids. GlcNAc is N-acetylglucosamine; MurNAc is N-acetylmuramic acid. Proteoglycans Peptidoglycan Glycoproteins Glycolipids Structure Location part of proteins at outer surface of plasma membrane, in extracellular matrix, and in blood Functions many functions, including cell adhesion strength for cell envelope Answer Bank glycosaminoglycan covalently joined to a protein at a Ser residue many functions, including acting as hormones bacterial cell wall extracellular matrix; some are integral membrane proteins outer...
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 skin contains stratified squamous epithelium and an underlying layer of areolar tissue. What structure is...
The skin contains stratified squamous epithelium and an underlying layer of areolar tissue. What structure is found where the two tissues come together? O goblet cell O basement membrane O cilia apical surface QUESTION 17 Epithelia are avascular. This means that O epithelia contain very little extracellular material, o epithelial tissues have a high capacity for regeneration. o epithelial tissues have an apical surface and a basal surface. O epithelial tissues do not contain blood vessels QUESTION 18 Which of...
1.Select 5-10 of the following vocabulary terms located near the bottom of the document. 2.. show...
1.Select 5-10 of the following vocabulary terms located near the bottom of the document. 2.. show how you relate the terms to one another (write down to the piece paper) 3. Prepare a short-written justification for your arrangement that explains how the terms are related. Vocabulary terms - Membrane, Permeability ,Phospholipid ,Cholesterol, Glycosylation ,Hydrophobic ,Hydrophilic ,Amphiphilic, Lipid bilayer, Peripheral proteins, Integral proteins, Fluidity, Channel, protein ,Concentration, gradient, Diffusion Facilitated transport Hypertonic Hypotonic Isotonic Osmosis Plasmolysis Passive transport Transport protein Solute...
3. Identify the following features of this phospholipid:
3. Identify the following features of this phospholipid: a. Is the phospholipid formed from glycerol or sphingosine? b. What is the fatty acid? c. What type of bond connects the fatty acid? d. What is the amino alcohol?5. What is the function of the lipid bilayer in a cell membrane?6. How do molecules of cholesterol affect the structure of cell membranes?7. How do the unsaturated fatty acids in the phospholipids affect the structure of cell membranes? 9. What is the difference between...
SDS-PAGE is often used to determine the location and orientation of membrane associated proteins. Commonly, experimental...
SDS-PAGE is often used to determine the location and orientation of membrane associated proteins. Commonly, experimental preparations of membranes are treated in a variety of ways in order to extract the proteins, which are then subjected to SDS-PAGE. These treatments will affect membrane proteins in different ways, based on how they are arranged in the membrane. One of the most common pre-treatments is by the digestive enzyme trypsin, which degrades polypeptide chains. Trypsin is too large to cross a membrane,...
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....
Match the component of the membrane to the correct letter on the image. Outside H - 8 G WMMWMV F Inside D с B E А A B 1. GIP anchored protein 2. Phospholipid or phospholipid head c D CE 3. glycolipid 4. Sphingolipid 5. Peripheral protein covalently linked to a lipid F H 6. sterol
2) A. Describe the structure of the phosphatidylcholine. B. Explain why phospholipids, and not triglycerides, are the primary component of the plasma membrane 3) Describe the hydrophobic effect and how promotes the formation of vesicles rather than sheets of phospholipids. 4) Define the following terms in relation to how the protein is associated with the plasma membrane: a. Transmembrane protein b. Integral protein c. Peripheral protein d. Anchored membrane proteins
toyer loses its fluidity when it freezes aquaporins can no longer function after freezing. O the integrity of the lipid bilayer is broken when the membrane freezes. QUESTION 9 What are the membrane structures that function in active transport? peripheral proteins O carbohydrates cholesterol integral proteins cytoskeleton filaments QUESTION 10 Which of the following is true of integral membrane proteins? They are loosely bound to the surface of the blayer They are not mobile within the bayer They lack tertiary...
Determine whether the structure, location, and functions describe proteoglycans, peptidoglycan, glycoproteins, or glycolipids. GlcNAc is N-acetylglucosamine; MurNAc is N-acetylmuramic acid. Proteoglycans Peptidoglycan Glycoproteins Glycolipids Structure Location part of proteins at outer surface of plasma membrane, in extracellular matrix, and in blood Functions many functions, including cell adhesion strength for cell envelope Answer Bank glycosaminoglycan covalently joined to a protein at a Ser residue many functions, including acting as hormones bacterial cell wall extracellular matrix; some are integral membrane proteins outer...
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 skin contains stratified squamous epithelium and an underlying layer of areolar tissue. What structure is found where the two tissues come together? O goblet cell O basement membrane O cilia apical surface QUESTION 17 Epithelia are avascular. This means that O epithelia contain very little extracellular material, o epithelial tissues have a high capacity for regeneration. o epithelial tissues have an apical surface and a basal surface. O epithelial tissues do not contain blood vessels QUESTION 18 Which of...
SDS-PAGE is often used to determine the location and orientation of membrane associated proteins. Commonly, experimental preparations of membranes are treated in a variety of ways in order to extract the proteins, which are then subjected to SDS-PAGE. These treatments will affect membrane proteins in different ways, based on how they are arranged in the membrane. One of the most common pre-treatments is by the digestive enzyme trypsin, which degrades polypeptide chains. Trypsin is too large to cross a membrane,...
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