Deck 17: Lipids

Question 1

Compared to saturated fatty acids, unsaturated fatty acids have

A)shorter carbon chains.
B)lower melting points.
C)higher melting points.
D)greater intermolecular attraction.
E)longer carbon chains.

Answer 1

lower melting points.

Question 2

What type of lipid is the following compound?

A)triacylglycerol
B)steroid
C)glycerophospholipid
D)wax
E)glycosphingolipid

Answer 2

wax

Question 3

Which of the following fatty acids is a solid at room temperature?

A)palmitoleic
B)stearic
C)oleic
D)linolenic
E)linoleic

Answer 3

stearic

Question 4

Which of the following lipids will give no fatty acid when hydrolyzed?

A)wax
B)cholesterol
C)glycolipid
D)phospholipid
E)fat

Question 5

Which of the following is a fatty acid which is a solid at room temprature?

A)
B)
C)
D)
E)

Question 6

Which of the following is NOT a lipid?

A)DNA
B)carnauba wax
C)cholesterol
D)oleic acid
E)lecithin

Question 7

What type of lipid is the following compound?

A)bile salt
B)glycerophospholipid
C)prostaglandin
D)wax
E)steroid

Question 8

Which of the following is an unsaturated fatty acid?

A)myristic
B)lauric
C)palmitic
D)oleic
E)stearic

Question 9

Which of the following fatty acids is most likely to be a liquid at room temprature ?

A)
B)
C)
D)
E)

Question 10

What type of lipid is the following compound?

A)glycerophospholipid
B)glycosphingolipid
C)steroid
D)triacylglycerol
E)wax

Question 11

What type of lipid is the following compound?

A)bile salt
B)wax
C)steroid
D)glycerophospholipid
E)triacylglycerol

Question 12

Choose he satrated fatty acid from the compounds below

A)
B)
C)
D)
E)

Question 13

A polyunsaturated fatty acid contains more than one

A)double bond.
B)carboxyl group.
C)hydroxyl group.
D)long carbon chain.
E)carbonyl group.

Question 14

Which statement is NOT true?

A)Some hormones are lipids.
B)Lipids are soluble in organic solvents.
C)Lipids are found in cell membranes.
D)There are many different types of lipids.
E)All lipids contain fatty acids.

Question 15

Which of the following is NOT a function of lipids in the human body?

A)protection
B)energy storage
C)insulation
D)pH regulation
E)chemical messengers

Question 16

A double cheeseburger with bacon contains 640 kcal and 39 g of fat. Calculate the number of kilocalories from fat, rounded to the tens place (1 gram of fat = 9 kcal).

A)4.3 kcal from fat
B)350 kcal from fat
C)640 kcal from fat
D)71 kcal from fat
E)39 kcal from fat

Question 17

Lipids are compounds that are soluble in

A)oxygen.
B)distilled water.
C)glucose solution.
D)chloroform.
E)normal saline solution.

Question 18

Unsaturated fatty acids have lower melting points than saturated fatty acids because

A)they have more hydrogen atoms.
B)they have fewer hydrogen atoms.
C)the trans double bonds give them an irregular shape.
D)the cis double bonds give them an irregular shape.
E)their molecules fit closely together.

Question 19

Choose the palyunsaturated fatty acid from the compounds below.

A)
B)
C)
D)
E)

Question 20

What type of lipid is the following compound?

A)prostaglandin
B)simple lipid
C)bile salt
D)triacylglycerol
E)sphingolipid

Question 21

Glycerophospholipids can interact both with other lipids and water because they contain both ________ and ________.

A)polar regions; nonpolar regions
B)bile salts; cholesterol
C)single bonds; double bonds
D)glycerol; sphingosine
E)saturated fatty acids; unsaturated fatty acids

Question 22

Palmitic acid is a 16 carbon acid. In a balanced equation, the products of the saponification of glyceryl
tripalmitate (tripalmitin) are

A)
B)
C)
D)
E)

Question 23

Which of the following is a polyunsaturated fat?

A)trilinolein
B)tristearin
C)trimyristin
D)triolein
E)tripalmitin

Question 24

The components in the following glycerophospholipid are

A)glycerol, palmitic acid, phosphate, and ethanolamine.
B)glycerol, palmitic acid, phosphate, and galactose.
C)sphingosine, palmitic acid, phosphate, and serine.
D)sphingosine, palmitic acid, phosphate, and ethanolamine.
E)sphingosine, palmitic acid, phosphate, and choline.

Question 25

A lecithin contains which of the following components?

A)glycerol, two fatty acids, phosphate and an amino alcohol
B)sphingosine, two fatty acids, phosphate and an amino alcohol
C)sphingosine, one fatty acid, phosphate and an amino alcohol
D)glycerol and three fatty acids
E)glycerol, two fatty acids and choline

Question 26

A double cheeseburger with bacon contains 640 kcal and 39 g of fat. Calculate the percentage of total kilocalories due to fat (1 gram of fat = 9 kcal).

A)6.1% of total kilocalories
B)0.68% of total kilocalories
C)100% of total kilocalories
D)55% of total kilocalories
E)11% of total kilocalories

Question 27

A triacylglycerol that is solid at room temperature is called a(n)

A)oil.
B)lecithin.
C)fat.
D)cephalin.
E)wax.

Question 28

Which of the following is NOT a function of glycerophospholipids?

A)protect nerve cells
B)transport of triacylglycerols
C)transport of cholesterol
D)aid in digestion
E)regulation of cellular permeability

Question 29

Choose the polyunsaturated triacylglycerol from the compounds below.

A)
B)
C)
D)
E)

Question 30

Choose the satuarted triacylglycerol from the compounds below.

A)
B)
C)
D)
E)

Question 31

The products of the saponification of a fat are

A)salts of fatty acids.
B)fatty acids and glycerol.
C)the esters of fatty acids.
D)phospholipids.
E)salts of fatty acids and glycerol.

Question 32

Which of the following compounds is a glycerophospholipid?

A)cerebroside
B)lecithin
C)jojoba wax
D)triolein
E)estrogen

Question 33

Waxes are lipids derived from

A)terpenes and steroids.
B)a long-chain alcohol and a long-chain fatty acid.
C)glycerol and three fatty acids.
D)glycerol, fatty acids, phosphate, and an amino alcohol.
E)sphingosine, fatty acids, phosphate, and an amino alcohol.

Question 34

The products of the acid catalyzed hydrolysis of a fat are

A)salts of fatty acids.
B)fatty acids and glycerol.
C)the esters of fatty acids.
D)phospholipids.
E)salts of fatty acids and glycerol.

Question 35

What phospholipid contains fatty acids but NOT glycerol?

A)glycolipid
B)lecithin
C)corticosteroid
D)sphingolipid
E)cephalin

Question 36

In the list below, which lipid type is most soluble in water?

A)glycerophospholipids
B)oils
C)triacylglycerols
D)steroids
E)waxes

Question 37

Which of the following lipids will give a single molecule of fatty acid per reactant molecule when hydrolyzed?

A)cholesterol
B)phospholipid
C)wax
D)glycolipid
E)fat

Question 38

Margarine containing partially hydrogenated soybean oil is solid because

A)it contains only cis double bonds.
B)some of its double bonds have been converted to single bonds.
C)it contains only polyunsaturated fatty acids.
D)it contains only trans fatty acids.
E)it contains only saturated fats.

Question 39

The products of this reaction is

A)glyceryl tripalmitate.
B)fat.
C)glyceryl tristearate.
D)glyceryl trioleate.
E)glyceryl tricaprate.

Question 40

Commercially, liquid vegetable oils are converted to solid fats such as margarine by

A)saponification.
B)hydrolysis.
C)hydrogenation.
D)oxidation.
E)hydration.

Question 41

The steroid hormone that increases the blood glucose and glycogen levels from fatty acids and amino acids is

A)prednisone.
B)cortisone.
C)aldosterone.
D)progesterone.
E)estrogen.

Question 42

Synthesis of cholesterol and bile salts takes place in the

A)gall bladder.
B)liver.
C)small intestine.
D)pancreas.
E)large intestine.

Question 43

According to the fluid-mosaic model of a cell membrane, the main component of a membrane is

A)a lipid bilayer.
B)a prostaglandin.
C)a steroid.
D)a glycoprotein.
E)a membrane protein.

Question 44

One inner component of a typical cell membrane is

A)palmitic acid.
B)cholesterol.
C)glycerol.
D)glycine.
E)glucose.

Question 45

Channel proteins in cell membranes serve what function?

A)They add strength and rigidity to the membrane.
B)They provide pathways for water and electrolytes to move through cell membranes.
C)They form the bilayer portion of the membrane.
D)They prevent interactions between the nonpolar tails of the phospholipids which gives the membrane its fluidity.
E)They allow nonpolar substances to move through the membrane.

Question 46

A lipoprotein particle functions to

A)dissolve polar lipids in urine.
B)dissolve polar lipids for excretion.
C)metabolize lipids into new substances.
D)transport nonpolar lipids to body cells.
E)store lipids in the tissues.

Question 47

Answer the question(s)that follow about the diagram shown below.
All of the following are insoluble in water except ________.

A)glyceryl tripalmitate
B)carnauba wax
C)cholesterol
D)oleic acid
E)acetic acid

Question 48

The steroid hormone present in birth control pills is

A)aldosterone.
B)norethindrone.
C)estrogen.
D)cortisone.
E)progesterone.

Question 49

Which of the following is NOT a lipoprotein that carries nonpolar lipids through the bloodstream?

A)LDL
B)chylomicron
C)HDL
D)VLDL
E)sphingosine

Question 50

Answer the question(s)that follow about the diagram shown below.
In this diagram of a cell membrane, the object labeled (B)is a

A)steroid.
B)hydrophobic region.
C)glycerophospholipid bilayer.
D)carbohydrate side chain.
E)membrane protein.

Question 51

Answer the question(s)that follow about the diagram shown below.
In this diagram of a cell membrane, the object labeled (C)is a

A)glycolipid.
B)steroid.
C)mitochondrion.
D)hydrophobic region.
E)phospholipid.

Question 52

Answer the question(s)that follow about the diagram shown below.
In the lipid bilayer of a cell membrane,

A)the hydrophilic heads are on the inner and outer surface and cholesterol is in the middle.
B)cholesterol is on the inner and outer surface and phospholipids are in the middle.
C)the hydrophilic heads are on the inner and outer surface and the hydrophobic tails in the middle.
D)there is a random arrangement of phospholipids.
E)the hydrophobic heads are on the inner and outer surface and the hydrophilic tails in the middle.

Question 53

Answer the question(s)that follow about the diagram shown below.
In this diagram of a cell membrane, the objects labeled (E)are

A)steroids.
B)carbohydrate side chains.
C)phospholipids.
D)hydrophobic regions.
E)proteins.

Question 54

The main lipid components in cellular membranes are

A)waxes.
B)triacylglycerols.
C)steroids.
D)terpenes.
E)glycerophospholipids.

Question 55

In the fluid-mosaic model that describes plasma membranes,

A)two layers of glycerophospholipid molecules have their nonpolar sections along the outer surface of the membrane.
B)two layers of glycerophospholipid molecules have their nonpolar sections oriented to the inside of the membrane.
C)A single row of glycerophospholipid molecules forms a barrier between the inside and outside of the cell.
D)there are three layers of glycerophospholipid molecules.
E)two layers of proteins separate the contents inside a cell from the surrounding fluids.

Question 56

The type of lipid that gives a cell membrane its shape is a

A)prostaglandin.
B)bile salt.
C)glycerophospholipid.
D)wax.
E)triacylglycerol.

Question 57

Answer the question(s)that follow about the diagram shown below.
In this diagram of a cell membrane, the small branched objects labeled (A)are part of a

A)steroid.
B)membrane protein.
C)glycerophospholipid.
D)carbohydrate side chain.
E)hydrophobic region.

Question 58

The most common type of gallstones is composed of almost pure

A)cholesterol.
B)calcium salts of fatty acids.
C)anabolic steroids.
D)glycerophospholipids.
E)bile salts.

Question 59

Answer the question(s)that follow about the diagram shown below.
In this diagram of a cell membrane, the object labeled (D)is

A)cholesterol.
B)hydrophobic region.
C)steroid.
D)glycerophospholipid.
E)glycosphingolipid.

Question 60

Which of the following is a lipid?

A)lactose
B)cholesterol
C)aniline
D)nicotine
E)collagen

Question 61

The structure is that of a ______

A)steroid
B)triacylglycerol
C)fatty acid
D)wax
E)glycerophospholipid

Question 62

Bile salts are among the lipid type known as ________.

A)triacylglycerols
B)cerebrosides
C)sphingosides
D)steroids
E)prostaglandins

Question 63

The structure is that of ______ acid.

A)arachidonic
B)oleic
C)stearic
D)palmitic
E)linoleic

Question 64

The name of the reaction that occurs when a fat reacts with sodium hydroxide and water is ________.

A)oxidation
B)reduction
C)hydrogenation
D)saponification
E)hydration

Question 65

An ion moves from low to high concentration across the cell membrane because of ________.

A)diffusion
B)facilitated transport
C)active transport

Question 66

Bile salts are synthesized from ________.

A)cholesterol
B)cephalin
C)pancreas
D)triacylglycerols
E)lecithin

Question 67

The structure is that of a ________.

A)steroid
B)fatty acid
C)triacyl glycerol
D)glycerophospholipid
E)wax

Question 68

Cholesterol belongs to the ________ type of lipids.

A)wax
B)prostaglandin
C)triacylglycerol
D)steroid
E)phospholipid

Question 69

Bile salts are stored in the ________.

A)stomach
B)liver
C)gall bladder
D)pancreas
E)small intestine

Question 70

In a simple model of atherosclerosis and heart disease, the compound that forms plaques that adhere to the walls of the blood vessels is ________.

A)stearic acid
B)carnauba wax
C)glycerol
D)sphingosine
E)cholesterol