________ contain a phosphate ester link between phosphoric acid and an alcohol.
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Liposome
________ is a spherical structure in which a lipid bilayer surrounds a water droplet.
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Glycerophospholipids
________ (also known as phosphoglycerides) are triesters of glycerol 3- phosphate and are the most abundant membrane lipids.
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→Waxes
________ are esters of unbranched fatty acids and alcohols.
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Sterol
________ is a lipid whose structure is based on a fused tetracyclic (four- ring) carbon skeleton.
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→Sterols
________ have many roles throughout both the plant and animal kingdoms.
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Soap
________ is the mixture of salts of fatty acids formed by saponification of animal fat.
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Grease
________ and dirt become coated by the nonpolar tails of the soap molecules and trapped in the center of the micelles as they form.
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→Fats
________ and oils are triacylglycerols- triesters of glycerol and fatty acids.
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Na +
________, K+, and other substances that maintain concentration gradients across the cell membrane cross with expenditure of energy and the aid of proteins (active transport)
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Lipids
________ are naturally occurring organic molecules that are nonpolar and therefore dissolve in nonpolar organic solvents but not in water.
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human biochemistry
In ________, the main sterol is cholesterol, which is an important component of cell membranes.
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triacylglycerols
They are named chemically as ________ but are often called triglycerides.
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Glycolipid
________ is a lipid with a fatty acid bonded to the C2¬NH2 group and a sugar bonded to the C1¬OH group of sphingosine.
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passive transport
Facilitated diffusion is ________ across a cell membrane with the assistance of a protein that changes shape.
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Lipid bilayer
________ is the basic structural unit of cell membranes; composed of two parallel sheets of membrane lipid molecules arranged tail to tail.
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Cell membranes
________ are composed of a fluid- like phospholipid bilayer.
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triesters of glycerol
All fats and oils are composed of ________ (propane 1, 2, 3- triol, also known as glycerin) with three fatty acids.
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Active transport
________ is the movement of substances across a cell membrane with the assistance of energy (e.g., from ATP)
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double bonds
If ________ are present in naturally occurring fats and oils, the ________ are usually cis rather than trans.
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soap
When ________ is dispersed in water, the big, organic anions cluster together so that their long, hydrophobic hydrocarbon tails are in contact, creating a nonpolar microenvironment.
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Passive transport
________ is the movement of a substance across a cell membrane without the use of energy, from a region of higher concentration to a region of lower concentration.
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saturated fatty acids
Those containing only carbon–carbon single bonds
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unsaturated fatty acids
those containing one or more carbon–carbon double bonds
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polyunsaturated fatty acid
have more than one carbon–carbon double bond
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degree of unsaturation
The number of double bonds present in a fatty acid
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fluid mosaic model
the overall structure of cell membranes is represented by this.
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