Question 1

In the fluid-mosaic model that describes plasma membranes,

Accepted Answer

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.F) None of the above
G) B) and E)

Question 2

Margarine containing partially hydrogenated soybean oil is solid because

Accepted Answer

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.F) A) and C)
G) A) and B)

Question 3

One inner component of a typical cell membrane is

Accepted Answer

A)  palmitic acid.
B)  cholesterol.
C)  glycerol.
D)  glycine.
E)  glucose.F) None of the above
G) All of the above

Question 4

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

Accepted Answer

A)  glycerophospholipids
B)  oils
C)  triacylglycerols
D)  steroids
E)  waxesF) All of the above
G) D) and E)

Question 5

The most common type of gallstones is composed of almost pure

Accepted Answer

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

Question 6

Choose he satrated fatty acid from the compounds below

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) A) and B)
G) A) and E)

Question 7

Which of the following is NOT a function of glycerophospholipids?

Accepted Answer

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

Question 8

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

Accepted Answer

A)  diffusion
B)  facilitated transport
C)  active transportD) A) and C)
E) All of the above

Question 9

The steroid hormone present in birth control pills is

Accepted Answer

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

Question 10

The products of the saponification of a fat are

Accepted Answer

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.F) A) and B)
G) C) and D)

Question 11

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

Accepted Answer

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

Question 12

Bile salts are synthesized from ________.

Accepted Answer

A)  cholesterol
B)  cephalin
C)  pancreas
D)  triacylglycerols
E)  lecithinF) C) and E)
G) None of the above

Question 13

Synthesis of cholesterol and bile salts takes place in the

Accepted Answer

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

Question 14

The structure is that of ______ acid.

Accepted Answer

A)  arachidonic
B)  oleic
C)  stearic
D)  palmitic
E)  linoleicF) A) and B)
G) C) and E)

Question 15

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) .

Accepted Answer

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 fatF) All of the above
G) A) and D) B

Question 16

Which statement is NOT true?

Accepted Answer

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.F) B) and C)
G) None of the above

Question 17

The components in the following glycerophospholipid are

Accepted Answer

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.F) B) and D)
G) A) and E)

Question 18

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

Accepted Answer

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.F) All of the above
G) C) and D)

Question 19

What phospholipid contains fatty acids but NOT glycerol?

Accepted Answer

A)  glycolipid
B)  lecithin
C)  corticosteroid
D)  sphingolipid
E)  cephalinF) None of the above
G) All of the above

Question 20

Which of the following is a polyunsaturated fat?

Accepted Answer

A)  trilinolein
B)  tristearin
C)  trimyristin
D)  triolein
E)  tripalmitinF) All of the above
G) A) and B)

Exam 17: Lipids

In the fluid-mosaic model that describes plasma membranes,

Correct AnswerverifiedShow Answer

Margarine containing partially hydrogenated soybean oil is solid because

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One inner component of a typical cell membrane is

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

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The most common type of gallstones is composed of almost pure

Correct AnswerverifiedA

Choose he satrated fatty acid from the compounds below

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Which of the following is NOT a function of glycerophospholipids?

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

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The steroid hormone present in birth control pills is

Correct AnswerverifiedB

The products of the saponification of a fat are

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

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Bile salts are synthesized from ________.

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Synthesis of cholesterol and bile salts takes place in the

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The structure is that of ______ acid.

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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) .

Correct AnswerverifiedB

Which statement is NOT true?

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The components in the following glycerophospholipid are

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

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What phospholipid contains fatty acids but NOT glycerol?

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Which of the following is a polyunsaturated fat?

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A

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B

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B

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