Question 1

Aldosterone regulates blood pressure and volume by controlling the concentration of Na+ and K+ in body fluids.

Accepted Answer

A) True 
 B)False

Question 2

The most common unsaturated fatty acids are palmitic and stearic acid.

Accepted Answer

A) True 
 B)False

Question 3

The compound below is a mixed triacylglycerol formed from oleic,stearic,and palmitic acids.

Accepted Answer

A) True 
 B)False

Question 4

Which statement concerning lipid functions is incorrect?

Accepted Answer

A)  Steroid hormones act as messenger molecules and regulate biochemical processes.
B)  Phospholipids,glycolipids,and cholesterol provide structure for cell membranes.
C)  Triacylglycerols are used for long term energy storage.
D)  Plants and animals use waxes for insulation.

Question 5

The coating that surrounds and insulates nerve cells,the myelin sheath,is particularly rich in sphingomyelins,and is vital for proper nerve function.

Accepted Answer

A) True 
 B)False

Question 6

The structure shown below is an example of a trans fatty acid.

Accepted Answer

A) True 
 B)False

Question 7

Triacylglycerols are stored in ________ cells below the skin and concentrated in some regions of the body.

Accepted Answer

The answer of Triacylglycerols are stored in ________ cells below...

Question 8

Which lipid has the lowest melting point?

Accepted Answer

A)   
B)   
C)   
D)

Question 9

The molecule below is an omega-9 fatty acid.

Accepted Answer

A) True 
 B)False

Question 10

As the number of double bonds in a fatty acid increases,the melting point ________.

Accepted Answer

The answer of As the number of double bonds in...

Question 11

The compound below is an example of a simple triacylglycerol.

Accepted Answer

A) True 
 B)False

Question 12

Cetyl palmitate is a component of spermaceti wax isolated from the heads of sperm whales,and is used in cosmetics. In which solvent would cetyl palmitate be expected to have the greatest solubility?

Accepted Answer

A)  Acetic acid
B)  Ethanol
C)  Hexane
D)  Water

Question 13

Testosterone (structure shown) is an androgen that control the development of secondary sex characteristics in males. Which of the following functional groups is not present in testosterone?

Accepted Answer

A)  Ketone
B)  Carboxylic acid
C)  Alcohol
D)  Alkene

Question 14

Prostaglandins and leukotrienes are two types of ________.

Accepted Answer

A)  low-density lipoproteins
B)  eicosanoids
C)  fat-soluble vitamins
D)  adrenal cortical steroids

Question 15

Which statement is not true?

Accepted Answer

A)  Cholesterol is the most prominent member of the steroid family.
B)  Cholesterol is insoluble in the aqueous medium of the blood.
C)  Cholesterol serves as the starting material for the synthesis of all other steroids.
D)  Cholesterol is a vital component for healthy cell membranes.
E)  Cholesterol cannot be synthesized in the body,and therefore is required in the diet.

Question 16

The fatty acid shown below will be a solid at room temperature.

Accepted Answer

A) True 
 B)False

Question 17

How many fatty acids are required to form a triacylglycerol?

Accepted Answer

A)  1
B)  2
C)  3
D)  4

Question 18

When phospholipids are mixed with water,they assemble in an arrangement called a lipid bilayer,with the ionic heads oriented on the inside and the nonpolar tails on the outside.

Accepted Answer

A) True 
 B)False

Question 19

Unsaturated fatty acids are sometimes classified as omega-n acids,where n is the carbon at which the first double bond occurs in the carbon chain,beginning at the end of the chain that contains the CH3 group.

Accepted Answer

A) True 
 B)False

Question 20

Although biofuels are prepared from renewable resources such as vegetable oils and animal fats,they still burn to form CO2,a gas that contributes to global warming.

Accepted Answer

A) True 
 B)False

Exam 19: Lipids

Which lipid has the lowest melting point?

Correct AnswerverifiedShow Answer

When phospholipids are mixed with water,they assemble in an arrangement called a lipid bilayer,with the ionic heads oriented on the inside and the nonpolar tails on the outside.

Correct AnswerverifiedShow Answer

The most common unsaturated fatty acids are palmitic and stearic acid.

Correct AnswerverifiedShow Answer

Testosterone (structure shown) is an androgen that control the development of secondary sex characteristics in males. Which of the following functional groups is not present in testosterone?

Correct AnswerverifiedShow Answer

The coating that surrounds and insulates nerve cells,the myelin sheath,is particularly rich in sphingomyelins,and is vital for proper nerve function.

Correct AnswerverifiedShow Answer

Although biofuels are prepared from renewable resources such as vegetable oils and animal fats,they still burn to form CO2,a gas that contributes to global warming.

Correct AnswerverifiedShow Answer

The fatty acid shown below will be a solid at room temperature.

Correct AnswerverifiedShow Answer

Triacylglycerols are stored in ________ cells below the skin and concentrated in some regions of the body.

Correct AnswerverifiedShow Answer

Which statement is not true?

Correct AnswerverifiedShow Answer

Unsaturated fatty acids are sometimes classified as omega-n acids,where n is the carbon at which the first double bond occurs in the carbon chain,beginning at the end of the chain that contains the CH3 group.

Correct AnswerverifiedShow Answer

Aldosterone regulates blood pressure and volume by controlling the concentration of Na+ and K+ in body fluids.

Correct AnswerverifiedShow Answer

Prostaglandins and leukotrienes are two types of ________.

Correct AnswerverifiedShow Answer

Which statement concerning lipid functions is incorrect?

Correct AnswerverifiedShow Answer

The structure shown below is an example of a trans fatty acid.

Correct AnswerverifiedShow Answer

The molecule below is an omega-9 fatty acid.

Correct AnswerverifiedShow Answer

The compound below is a mixed triacylglycerol formed from oleic,stearic,and palmitic acids.

Correct AnswerverifiedShow Answer

The compound below is an example of a simple triacylglycerol.

Correct AnswerverifiedShow Answer

As the number of double bonds in a fatty acid increases,the melting point ________.

Correct AnswerverifiedShow Answer

Cetyl palmitate is a component of spermaceti wax isolated from the heads of sperm whales,and is used in cosmetics. In which solvent would cetyl palmitate be expected to have the greatest solubility?

Correct AnswerverifiedShow Answer

How many fatty acids are required to form a triacylglycerol?

Correct AnswerverifiedShow Answer

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Although biofuels are prepared from renewable resources such as vegetable oils and animal fats,they still burn to form CO₂,a gas that contributes to global warming.

Correct Answer
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Unsaturated fatty acids are sometimes classified as omega-n acids,where n is the carbon at which the first double bond occurs in the carbon chain,beginning at the end of the chain that contains the CH₃ group.

Correct Answer
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Aldosterone regulates blood pressure and volume by controlling the concentration of Na⁺ and K⁺ in body fluids.

Correct Answer
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