Multiple Choice Quiz

Multiple Choice Quiz

Multiple Choice Quiz


1		What is the product of the following reaction?
			A)
			B)
			C)
			D)


2		Which of the following structures is NOT classified as a lipid?
			A)
			B)
			C)
			D)


3		Which of the following statements is NOT true regarding fatty acids?
			A)	Fatty acids dissolve in nonpolar solvents.
			B)	Triglycerides are esters of fatty acids.
			C)	Most naturally occurring fatty acids have trans double bonds.
			D)	Fatty acids are biosynthesized from acetate.


4		Which of the following represents the structure of a triacylglyceride?
			A)
			B)
			C)
			D)


5		Answer both questions a) and b). a) Is the following triacylglycerol chiral? b) Are any of its hydrolysis products chiral?
			A)	a) no b) no
			B)	a) yes b) no
			C)	a) yes b) yes
			D)	a) no b) yes


6		Which of the following compounds is NOT expected to be found in significant amount upon the hydrolysis of fats? a. CH₃(CH₂)₁₀CO₂H b. CH₃(CH₂)₁₁CO₂H c. CH₃(CH₂)₁₂CO₂H d. HOCH₂CH(OH)CH₂OH
			A)	a
			B)	b
			C)	c
			D)	d


7		Which of the following structures is a sesquiterpene?
			A)
			B)
			C)
			D)


8		Where are the isoprene subunits in the following terpene?
			A)
			B)
			C)
			D)


9		Upon ozonolysis of a diterpene, the following products are formed. Which could be the diterpene used to accomplish the reaction?
			A)
			B)
			C)
			D)


10		The molecular formula of compound A is C₁₅H₂₄. Ozonolysis gives the following compound and formaldehyde. Which could be compound A?
			A)
			B)
			C)
			D)


11		Which of the following is a steroid?
			A)
			B)
			C)
			D)


12		Which of the following is NOT a steroid?
			A)
			B)
			C)
			D)


13		What is the product of the following synthesis?
			A)
			B)
			C)
			D)


14		Which of the following steroid derivatives has 9 stereocenters?
			A)
			B)
			C)
			D)


15		Which of the following statements regarding the biosynthesis of cholesterol is FALSE?
			A)	Cholesterol has the same carbon skeleton as its biosynthetic precursor, lanosterol.
			B)	Cholesterol is derived from the dimerization of farnesyl pyrophosphate in a head-to-head manner.
			C)	Cyclization of squalene to cholesterol is initiated by acid-catalyzed ring opening of an epoxide.
			D)	Cholesterol has three fewer carbon atoms than lanosterol.


16		Which of the following compounds represents the structure of testosterone?
			A)
			B)
			C)
			D)


17		Which of the following tetracyclic compounds corresponds to the typical 17-carbon steroid nucleus?
			A)
			B)
			C)
			D)


18		Which of the following structures is a prostaglandin?
			A)
			B)
			C)
			D)


19		Which of the following fatty acids is involved in the biosynthesis of prostaglandins?
			A)
			B)
			C)
			D)


20		Prostaglandins are synthesized from arachidonic acid. Which of the following structures has the carbons that make up the ring properly indicated?
			A)	a
			B)	b
			C)	c
			D)	d


21		How many ester linkages are present in a typical phospholipid?
			A)	2
			B)	3
			C)	4
			D)	5


22		Which of the following statements regarding a phospholipid such as lecithin is FALSE?
			A)	Hydrolysis of lecithin gives glycerol and phosphoric acid.
			B)	Hydrolysis of lecithin gives only saturated fatty acids.
			C)	Lecithin forms a lipid bilayer that has a polar and a nonpolar component.
			D)	The nonpolar part of the lipid bilayer consists of hydrocarbon chains.


23		Which of the following structures represents a “wax”?
			A)
			B)
			C)
			D)


24		Which of the following structures is NOT a “wax”?
			A)
			B)
			C)
			D)


25		What are the products of the hydrolysis of the following wax? Hint: The hydrolysis is done under acidic conditions.
			A)
			B)
			C)
			D)

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