Why is the phospholipid bilayer referred to as a 2 dimensional fluid?
Homework Answers
It is because the phospholipid bilayer is made of head present at both sides facing the aqueous environment and the tails reside at the interior side away from the water. The head is hydrophilic while the tail is hydrophobic. So, on the outside there is aqueous environment and on the inside there is non-aqueous environment, thus creating a 2-dimesion of fluids.
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Why is the phospholipid bilayer referred to as a 2 dimensional
fluid?
1. The fluid mosaic model describes cell membranes as consisting of A) a phospholipid bilayer with...
1. The fluid mosaic model describes cell membranes as consisting of A) a phospholipid bilayer with embedded carbohydrates B) two layers of phospholipids with protein sandwiched between them C) a protein bilayer with embedded phospholipids D) carbohydrates, proteins, and phospholipids that can drift in the membrane E) individual proteins that can drift in a phospholipid bilayer 2. When a poison, such as Paraderil found in flea dip, blocks the electron transport chain, the citric acid cycle soon grinds to a...
1. What is NOT TRUE regarding a phospholipid bilayer? A. The two leaflets of the bilayer...
1. What is NOT TRUE regarding a phospholipid bilayer? A. The two leaflets of the bilayer are identical. B. It takes energy to flip one phospholipid from one side to the other C. In animal cells cholesterol is inserted into the bilayer D. The bilayer can contain more than one type of phospholipid. 2. New membrane is made and assembled in the ___ and delivered to the plasma membrane in vesicles derived from the _. A. Cytosol; ER B. Cytosol;...
Part A Which component of a lipid bilayer is NOT in contact with the extracellular fluid?...
Part A Which component of a lipid bilayer is NOT in contact with the extracellular fluid? View Available Hint(s) O fatty acid tails of a phospholipid O polar heads of a phospholipid O carbohydrates O proteins Submit
How might a steroid molecule be oriented in a phospholipid bilayer?
How might a steroid molecule be oriented in a phospholipid bilayer?
21. The fluid in blood vessels and the Interstitial space is referred to as: a. The...
21. The fluid in blood vessels and the Interstitial space is referred to as: a. The extracellular fluid compartment b. Plasma c. The Intracellular fluid compartment 22. Why is the resting cell membrane more permeable to K+ than to Na+? a. Because gated K+ channels are always open. b. Because K+ can diffuse through the phospholipid bilayer of the resting cell membrane and Na+ cannot. c. Because the cell membrane contains Leak (ungated) K+ Channels. 23. Lipid soluble molecules, carbon...
what were the key changes in the structure of the phospholipid bilayer change that were necessary...
what were the key changes in the structure of the phospholipid bilayer change that were necessary for life to appear and why are these concepts important in the eventual evolution of life on earth ?
» Predict the relative rates of movements of particular solutes through a phospholipid bilayer.
» Predict the relative rates of movements of particular solutes through a phospholipid bilayer.
Shown is a phospholipid bilayer with Na+ on each side. What direction will the Na+ move?...
Shown is a phospholipid bilayer with Na+ on each side. What
direction will the Na+ move?
A. A to B
B. B to A
C. Both directions
D. It can't move across the bilayer
What functions of a membrane would be compromised if the membrane consisted of a phospholipid bilayer...
What functions of a membrane would be compromised if the membrane consisted of a phospholipid bilayer without proteins? Give at least 3 specific examples.
Double layer (bilayer) of phospholipid molecules Transmembrane Phospholipid bilayer protein Integral proteins Peripheral proteins Cytoplasmic side...
Double layer (bilayer) of phospholipid molecules Transmembrane Phospholipid bilayer protein Integral proteins Peripheral proteins Cytoplasmic side of membrane Cholesterol molecules Hydrophobic fatty acid "tail" Hydrophilic phosphate "head Figure 3-2 Structures of the Cell Membrane Questions 4. Match the cellular components in column A with the descriptions in column B. Place the letter of your choice in the space provided. Column A a. Chromatin b. Cytoplasm c. Endoplasmic reticulum d. Golgi apparatus e. Lysosome f. Microtubule g. Mitochondrion h. Nuclear envelope...
Part A Which component of a lipid bilayer is NOT in contact with the extracellular fluid? View Available Hint(s) O fatty acid tails of a phospholipid O polar heads of a phospholipid O carbohydrates O proteins Submit
21. The fluid in blood vessels and the Interstitial space is referred to as: a. The extracellular fluid compartment b. Plasma c. The Intracellular fluid compartment 22. Why is the resting cell membrane more permeable to K+ than to Na+? a. Because gated K+ channels are always open. b. Because K+ can diffuse through the phospholipid bilayer of the resting cell membrane and Na+ cannot. c. Because the cell membrane contains Leak (ungated) K+ Channels. 23. Lipid soluble molecules, carbon...
» Predict the relative rates of movements of particular solutes through a phospholipid bilayer.
Shown is a phospholipid bilayer with Na+ on each side. What
direction will the Na+ move?
A. A to B
B. B to A
C. Both directions
D. It can't move across the bilayer
Double layer (bilayer) of phospholipid molecules Transmembrane Phospholipid bilayer protein Integral proteins Peripheral proteins Cytoplasmic side of membrane Cholesterol molecules Hydrophobic fatty acid "tail" Hydrophilic phosphate "head Figure 3-2 Structures of the Cell Membrane Questions 4. Match the cellular components in column A with the descriptions in column B. Place the letter of your choice in the space provided. Column A a. Chromatin b. Cytoplasm c. Endoplasmic reticulum d. Golgi apparatus e. Lysosome f. Microtubule g. Mitochondrion h. Nuclear envelope...
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