How can we help?

You can also find more resources in our Help Center.

CHM1032L Timberlake 15

STUDY
PLAY
Which statement is not true?
All lipids contain fatty acids.
Lipids are compounds that are soluble in
chloroform
Which of the following is not a function of lipids in the human body?
pH regulation
Which of the following lipids will give a single molecule of fatty acid when hydrolyzed?
wax
A polyunsaturated fatty acid contains more than one
double bond
Unsaturated fatty acids have lower melting points than saturated fatty acids because
the cis double bonds give them an irregular shape
Which of the following is an unsaturated fatty acid?
A) myristic
B) oleic ***
C) palmitic
D) stearic
E) lauric
Compared to saturated fatty acids, unsaturated fatty acids have
lower melting points
Waxes are lipids derived from
a long-chain alcohol and a long-chain fatty acid.
A triacylglycerol that is solid at room temperature is called a(n)
fat
Commercially, liquid vegetable oils are converted to solid fats such as margarine by
hydrogenation
Margarine containing partially hydrogenated soybean oil is solid because
some of its double bonds have been converted to single bonds.
The products of the acid catalyzed hydrolysis of a fat are
A) the esters of fatty acids.
B) fatty acids and glycerol ***
C) salts of fatty acids.
D) salts of fatty acids and glycerol.
E) glycerophospholipids
A fatty acid salt can act as a soap to remove grease because
the nonpolar tails of the salt dissolve in the grease and the polar salt ends dissolve in water
Glycerophospholipids can interact both with other lipids and water because they contain
polar regions and nonpolar regions
The main lipid components in cellular membranes are
glycerolphospholipids
Which of the lipid types listed below is most soluble in water?
glycerolphospholipids
Which of the following compounds is a glycerophospholipid?
lecithin
Which of the following is a lipid?
cholesterol
Which of the following is not a function of glycerophospholipids?
aid in digestion
The most common type of gallstones is composed of almost pure
cholesterol
Which of the following is not a lipoprotein that carries nonpolar lipids through the bloodstream?
glycerol
The steroid hormone that increases the blood glucose and glycogen levels from fatty acids and amino acids is
cortisone
In the fluid-mosaic model that describes cell membranes
two layers of glycerophospholipid molecules have their nonpolar sections oriented to the inside of the membrane
A double cheeseburger with bacon contains 39 g of fat. Calculate the number of kilocalories from fat. (1 gram of fat = 9 kcal).
350 kcal from fat
According to the fluid-mosaic model of a cell membrane, the main component of a membrane is
a lipid bilayer.
The type of lipid that gives a cell membrane its shape is a
glycerophospholipid
A lipoprotein particle functions to
dissolve polar lipids in urine
Synthesis of cholesterol takes place in the
liver
Cholesterol belongs to the ________ group of lipids
steroid
A precursor of prostaglandins is ________ acid
arachidonic
In a simple model of atherosclerosis and heart disease, the compound that forms plaques that adhere to the walls of the blood vessels is ________.
cholesterol
The name of the reaction that occurs when a fat reacts with sodium hydroxide and water is ________.
saponification
The catalyst needed for saponification is H+ ion.
false
Oleic acid is a saturated fatty acid
false
Fish such as salmon and tuna are high in omega-3 fatty acids.
true
Olestra is a triacylglycerol
false
Hydrogenation of a double bond in a triacylglycerol requires a catalyst
true
Most plant lipids are saturated lipids
false
One function of glycerophospholipids is to provide structure to cell membranes
true
In the fluid-mosaic model of cell membranes, the glycerophospholipid molecules are oriented with their heads to the outside of the membrane.
true
Glycerophospholipids are components of cell membranes
true
The interior of a lipid bilayer is the hydrophilic region.
false
Waxes do not contain fatty acids
false
Steroids do not contain fatty acids
true
Triacylglycerols are formed from glycerol and ________.
fatty acids
a lipid that cannot be hydrolyzed
cholesterol
the functional group of triacylglycerols
ester
a fatty acid with at least one double bond
unsaturated
the process of converting unsaturated fats into saturated fats
hydrogenation
the melting points of saturated fats compared to unsaturated fats
higher
a source of most saturated fats
animals
a characteristic common to most lipids
insoluble in water
the product of reacting a triacylglycerol with a strong base and water
soap
triolein
triacylglycerol
aldosterone
steroid
testosterone
steroid
cephalin
glycerophospholipid
oleic acid
fatty acid