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Kinks in phospholipid tails are caused by the presence of unsaturated fatty acids, which contain double bonds that introduce a bend in the tail structure. These kinks affect the packing of phospholipids in the cell membrane, influencing its fluidity and permeability. The degree of unsaturation in the fatty acid tails can impact the overall properties of the membrane.
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What part of phospholipid molecule would reject the polar molecule glucose?
The fatty acid tails of the phospholipid molecule would reject the polar molecule glucose, as the tails are nonpolar and hydrophobic in nature. Glucose is hydrophilic and would not be compatible with the hydrophobic environment created by the fatty acid tails.
On a phospholipid which part is hydrophobic?
The substance that forms the hydrophobic tail on the back end of a phospholipid are fatty acids. Phospholipids are not "true fats" as they have a phosphate group that replaces one of the fatty acids
In a plasma membrane how do the tails of the phospholipid molecules lineup?
they are sandwiched between two layers of heads
Does the plasma membrane have a double layer?
Yes, the plasma membrane is composed of a phospholipid bilayer, which is a double layer of phospholipid molecules arranged with their hydrophobic tails facing inward and their hydrophilic heads facing outward towards the extracellular and intracellular environments.
In a plasma membrane how do tails of the phospholipid molecules line up?
they are sandwiched between two layers of heads
What happens to unsaturated tails at the sites of their double bonds?
If a tail is "unsaturated," some or all of the carbons are not bonded to the maximum number of hydrogens possible, due to double bonds. These double bonds create "kinks" in the tails; in other words, it is not a straight carbon chain. This gives rise to the ability for the lipid to have a lower freezing point because the tails don't "pack" together. This is especially important in the phospholipid bilayer of a plasma membrane. Unicellular organisms which inhabit colder-temperate climates are more likely to have unsaturated phospholipid tails. The "kinks" in the tails prevent the fluid membrane from freezing during the colder months.
Which statement most accurately describes the relationship between the permeability and fluidity properties of phospholipid bilayers and their structure?
The permeability and fluidity of phospholipid bilayers are influenced by their structure. Phospholipid bilayers with more unsaturated fatty acids are more fluid and permeable due to the presence of double bonds, which creates kinks in the tails and prevents close packing. Additionally, bilayers with cholesterol have reduced permeability but maintain fluidity by regulating the packing of the phospholipids.
What part of the phospholipid is nonpolar?
the two fatty acid tails
What part of the phosphilipid bilayer is hydropholic?
the inside of it, the phospholipid's tails
Are fatty acid tails of a phospholipid molecules polar?
This is called the hydrophobic 'side' of the phospholipid molecule
What part of phospholipid molecule would reject the polar molecule glucose?
The fatty acid tails of the phospholipid molecule would reject the polar molecule glucose, as the tails are nonpolar and hydrophobic in nature. Glucose is hydrophilic and would not be compatible with the hydrophobic environment created by the fatty acid tails.
What is a double walled with molecules that have hydrophobic tails and hydrophilic head?
Phospholipid Bilayer
What is a phospholipid composes of?
a head (phosphate group) and two tails (fatty acids)
Fats that have kinks in their tails are?
A kink in a cat's tail is usually an indication that it was broken at one time.
On a phospholipid which part is hydrophobic?
The substance that forms the hydrophobic tail on the back end of a phospholipid are fatty acids. Phospholipids are not "true fats" as they have a phosphate group that replaces one of the fatty acids
In a plasma membrane how do the tails of the phospholipid molecules lineup?
they are sandwiched between two layers of heads
Which part of phospholipd molecule is non polar and hydrophobic?
The hydrophobic portion of the phospholipid molecule is the fatty acid tails. These tails consist of long hydrocarbon chains that do not interact well with water molecules, making them nonpolar and hydrophobic.
