CHM1032L Timberlake 15

59 terms by absynthedrinker 

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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

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