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 peripheral and integral proteins?
10. Identify the type of transport described by each of the following:
a. A molecule moves through a protein channel. b. O2 moves into the cell from a higher concentration outside the cell. c. An ion moves from low to high concentration in the cell. d. Carbon dioxide moves through a cell membrane.
Homework Answers
3a) phospholipid formed from glycerol
3b) Lauric acid, CH3(CH2)10COOH
3c) ester bond connects the fatty acid and glycerol
3d) Choline is amino alcohol here.
Date Submitted Deadline: November 26, 2018 1. Refer to the structure of a fatty acid below...
Date Submitted Deadline: November 26, 2018 1. Refer to the structure of a fatty acid below (A) What is the systematic name of this fatty acid? (B) What is the common name of this fatty acid? (C) What is the shorthand notation of this fatty acid? (D) Is this an W-3 or w-6 fatty acid? (E) What would be its melting point relative to linoleic acid? (F) What would be the general effect of this fatty acid in the fluidity...
15. The process by which double-bonds in unsaturated fatty acids are converted to single bonds is...
15. The process by which double-bonds in unsaturated fatty acids are converted to single bonds is termed . The 16. Fatty acids are linked to glycerol by a reaction known as opposite chemical process is termed 17. True / False Micelles are lipid bilayers and differ from the phospholipid bilayer of cell membranes only in scale. 18. Triglycerides and even more so phospholipids contain a polar head and a nonpolar tail that results in dual polar-nonpolar nature. These compounds are...
Which of the following is NOT true of lipid rafts? The are less fluid than the...
Which of the following is NOT true of lipid rafts? The are less fluid than the surrounding membrane The can serve to localize components of reactions and pathways They contain a higher concentration of cholesterol than the surrounding membrane They contain a higher concentration of glycolipids than the surrounding membrane Lipid composition (i.e. the % of each type of lipid) of a membrane often differs (Select any/all that apply) OAt different locations in the cell (i.e. in different organelles) In...
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...
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....
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LIPID AND MEMBRANE QUESTIONS 1. If an unsaturated fatty acid has 18 carbons, a double bond at position would be in notation - 2. The functional groups which hold fatty acid molecules and glycerol molecules together in triacylglecerol molecules are called: 3. If a triacylglycerol is heated in aqueous sodium hydroxide (lye) solution glycerol and the sodium salts of fatty acids are produced. This mixture of sodium salts of fatty acids is called in common terminology 4. Name the four...
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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....
Choose the correct statements about lipid bilayers Evr, The following Lipid raft Phospholipid Sphingolipid Cholesterol question...
Choose the correct statements
about lipid bilayers
Evr, The following Lipid raft Phospholipid Sphingolipid Cholesterol question is related to the image below: You are working in a lab and have tagged the above cell membrane with fluorescent tags. Select the true statement(s) out of the following O The yellow portions are typically sites of cell signaling for protein receptors, while the red portions contain fatty acid derivatives and help maintain membrane fluidity O The yellow portions contain a glycerol backbone...
Which of these statements about the composition of membranes is true?
Which of these statements about the composition of membranes is true?A) All biological membranes contain cholesterol.B) Free fatty acids are major components of all membranes. C) The inner and outer membranes of mitochondria have different protein compositions.D) The lipid composition of all membranes of eukaryotic cells is essentially the same.E) The lipid: protein ratio varies from about 1: 4 to 4: 1Membrane proteins:A) ere sometimes covalently attached to lipid moieties:B) are sometimes covalently attached to carbohydrate moieties.C) are composed of...
1. Which of the following statements describes lipids? A) Lipids all have the steroid backbone. B)...
1. Which of the following statements describes lipids? A) Lipids all have the steroid backbone. B) The body stores excess calories as lipids. C) Lipids are insoluble in water, but soluble in nonpolar solvents. D) Lipids are soluble in water, but insoluble in nonpolar solvents. E) Lipids are insoluble in all solvents 2. Which of the following type of molecule is not a lipid? A) amino acid B) triglyceride C) phospholipid D) steroid E) eicosanoid 3. Which type of lipid...
Date Submitted Deadline: November 26, 2018 1. Refer to the structure of a fatty acid below (A) What is the systematic name of this fatty acid? (B) What is the common name of this fatty acid? (C) What is the shorthand notation of this fatty acid? (D) Is this an W-3 or w-6 fatty acid? (E) What would be its melting point relative to linoleic acid? (F) What would be the general effect of this fatty acid in the fluidity...
15. The process by which double-bonds in unsaturated fatty acids are converted to single bonds is termed . The 16. Fatty acids are linked to glycerol by a reaction known as opposite chemical process is termed 17. True / False Micelles are lipid bilayers and differ from the phospholipid bilayer of cell membranes only in scale. 18. Triglycerides and even more so phospholipids contain a polar head and a nonpolar tail that results in dual polar-nonpolar nature. These compounds are...
Which of the following is NOT true of lipid rafts? The are less fluid than the surrounding membrane The can serve to localize components of reactions and pathways They contain a higher concentration of cholesterol than the surrounding membrane They contain a higher concentration of glycolipids than the surrounding membrane Lipid composition (i.e. the % of each type of lipid) of a membrane often differs (Select any/all that apply) OAt different locations in the cell (i.e. in different organelles) In...
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...
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....
LIPID AND MEMBRANE QUESTIONS 1. If an unsaturated fatty acid has 18 carbons, a double bond at position would be in notation - 2. The functional groups which hold fatty acid molecules and glycerol molecules together in triacylglecerol molecules are called: 3. If a triacylglycerol is heated in aqueous sodium hydroxide (lye) solution glycerol and the sodium salts of fatty acids are produced. This mixture of sodium salts of fatty acids is called in common terminology 4. Name the four...
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....
Choose the correct statements
about lipid bilayers
Evr, The following Lipid raft Phospholipid Sphingolipid Cholesterol question is related to the image below: You are working in a lab and have tagged the above cell membrane with fluorescent tags. Select the true statement(s) out of the following O The yellow portions are typically sites of cell signaling for protein receptors, while the red portions contain fatty acid derivatives and help maintain membrane fluidity O The yellow portions contain a glycerol backbone...
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