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Cell membranes, which form an effective barrier to the passage of ions and other components into and out of the cell, are composed of a lipid bilayer.

A) True
B) False

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The major lipid component of cell membranes is phospholipids.

A) True
B) False

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The structure of andosterone is given below. The structure of andosterone is given below. The following is produced when andosterone is treated with NaBH<sub>4</sub> in ethanol. The following is produced when andosterone is treated with NaBH4 in ethanol. The structure of andosterone is given below. The following is produced when andosterone is treated with NaBH<sub>4</sub> in ethanol.

A) True
B) False

Correct Answer

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The number of carbon atoms in the unsaturated fatty acid from which prostaglandins are derived is _____.

Correct Answer

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Circle the hydrophilic part of sodium 4-dodecylbenzenesulfonate, a synthetic detergent, and put a rectangle around the hydrophobic part. Circle the hydrophilic part of sodium 4-dodecylbenzenesulfonate, a synthetic detergent, and put a rectangle around the hydrophobic part.

Correct Answer

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The general formula for a fat or oil is shown below. The general formula for a fat or oil is shown below.

A) True
B) False

Correct Answer

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Compounds that are obtained from the saponification of triglycerides are glycerol and fatty acid salts.

A) True
B) False

Correct Answer

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Lipids are substances that are in water and in nonpolar organic solvents. Enter the answers separated by a comma.

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Ca+2, Mg+2, and/or Fe+3 are responsible for producing soap scum in water.

A) True
B) False

Correct Answer

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What is the structure of stearic acid?


A) CH3(CH2) 16COOH
B) CH3(CH2) 7CH=CH(CH2) 7COOH
C) CH3(CH2) 18COOH
D) CH3CH2(CH=CHCH2) 3(CH2) 6COOH

E) B) and D)
F) None of the above

Correct Answer

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How many triglycerides (including stereoisomers) are there which contain two molecules of stearic acid, and one of myristic acid?


A) 3
B) 6
C) 9
D) 12

E) A) and B)
F) A) and D)

Correct Answer

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What is the approximate value of pKa of a bile acid?


A) -4
B) 1
C) 5
D) 25

E) None of the above
F) C) and D)

Correct Answer

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Consider the following structures. Consider the following structures. Use these to answer the following questions by placing the appropriate Roman numerical in the blank. -Saponification followed by protonation of structure _____ produces three moles of the same saturated fatty acid. Use these to answer the following questions by placing the appropriate Roman numerical in the blank. -Saponification followed by protonation of structure _____ produces three moles of the same saturated fatty acid.

Correct Answer

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What is the structure of oleic acid?


A) CH3(CH2) 16COOH
B) CH3(CH2) 7CH=CH(CH2) 7COOH
C) CH3(CH2) 18COOH
D) CH3CH2(CH=CHCH2) 3(CH2) 6COOH

E) A) and C)
F) A) and B)

Correct Answer

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