Deck 26: Lipids

Question 1

Which of the following is a correct description of waxes?

A)long chain esters
B)long chain ethers
C)long chain anhydrides
D)long chain fatty acids
E)long chain alcohols

Answer 1

long chain esters

Question 2

Which one of the following is a complex lipid?

A)steroids
B)terpenes
C)waxes
D)prostaglandins
E)none of these

Answer 2

waxes

Question 3

Which one of the following has the lowest melting point?

A)trilaurin
B)tristearin
C)trilinolein
D)tripalmitolein
E)none of these

Answer 3

trilinolein

Question 4

Predict the product(s)when spermaceti is treated with aqueous NaOH.

Question 5

Which one of the following is a simple lipid?

A)steroids
B)triglycerides
C)phoshpholipids
D)waxes
E)oils

Question 6

Which of the following is a structure of wax?

A)I
B)II
C)III
D)IV
E)V

Question 7

Which one of the following fatty acids has the lowest melting point?

A)stearic acid
B)palmitic acid
C)lauric acid
D)arachidic acid
E)none of these

Question 8

The following compound is best classified as a(n)_________.

A)simple lipid
B)unsaturated triglyceride
C)unsaturated fatty acid
D)fat
E)wax

Question 9

Which one of the following is a simple lipid?

A)lecithin
B)tripalmitin
C)sodium lauryl sulfate
D)androsterone
E)none of these

Question 10

The following compound is best classified as a(n)_________.

A)simple lipid
B)saturated triglyceride
C)saturated fatty acid
D)fat
E)wax

Question 11

______lipids do not undergo hydrolysis in presence of aqueous acid or base.

Question 12

Which one of the following fatty acids has the highest melting point?

A)oleic acid
B)linoleic acid
C)palmitoleic acid
D)arachidonic acid
E)none of these

Question 13

______lipids undergo hydrolysis in presence of aqueous acid or base.

Question 14

Which one of the following fatty acids has the highest melting point?

A)stearic acid
B)palmitic acid
C)lauric acid
D)arachidic acid
E)none of these

Question 15

Which one of the following is a complex lipid?

A)cortisone
B)vitamin A
C)prostaglandins
D)progestin
E)tripalmitin

Question 16

Which one of the following has the highest melting point?

A)triolein
B)trilinolein
C)tripalmitolein
D)trimyrisitin
E)none of these

Question 17

When beeswax was treated with aqueous NaOH,it produced the following two products.Provide the structure of beeswax.

Question 18

Which one of the following fatty acids has the lowest melting point?

A)oleic acid
B)linoleic acid
C)palmitoleic acid
D)arachidonic acid
E)none of these

Question 19

Arrange the following compounds in decreasing order of melting point.

A)II>I>IV>III
B)III>IV>I>II
C)IV>I>II>III
D)III>II>IV>I
E)none of these

Question 20

The following compound is best classified as a(n)_________.

A)simple lipid
B)fat
C)cephalin
D)wax
E)oil

Question 21

Predict the product for the following reaction.

Question 22

A triglyceride produced a linoleic acid residue,a palmitoleic acid residue and an oleic acid residue,when heated in the presence of acid.Provide one of the possible structures for this triglyceride.

Question 23

Predict the product(s)for the following reaction.

Question 24

Predict the product for the following reaction.

Question 25

The interior of a micelle is ______,where as the exterior is _______.

A)hydrophilic,hydrophobic
B)hydrophilic,hydrophilic
C)hydrophobic,hydrophobic
D)hydrophobic,hydrophilic

Question 26

In the presence of molecular oxygen,saturated triglycerides undergo autooxidation to yield hydroperoxides.

Question 27

Which one of the following fatty acids is produced when oleic acid is hydrogenated?

A)palmitic acid
B)lauric acid
C)myrsitic acid
D)arachidic acid
E)stearic acid

Question 28

How many isomers are possible for a triacylglyceride that contains one palmitic acid residue,one arachidic acid residue and one stearic acid residue?

A)3
B)6
C)9
D)12
E)15

Question 29

Provide the structure of an optically active triglyceride that produced two myrsitic acid residues and an oleic acid residue when heated in the presence of acid.

Question 30

Predict the product(s)for the following reaction.

Question 31

Which one of the following is classified as fat?

A)triolein
B)trilinolein
C)tripalmitolein
D)triarchadin
E)none of these

Question 32

Which of the following fatty acid(s)is not present in natural fats and oils?

A)octadecanoic acid
B)heptadecanoic acid
C)hexadecanoic acid
D)octadeca-9,12-dienoic acid
E)none of these

Question 33

Reaction of triglycerides with a base is ________ reaction.

A)an esterification
B)a transesterification
C)a saponification
D)an autooxidation
E)A & B

Question 34

An optically active triglyceride produced two palmitic acid residues and one oleic acid residue,when heated in the presence of acid.Provide the structure(s)for this triglyceride.

A)I
B)II
C)III
D)IV
E)B & C

Question 35

Which one of the following is classified as oil?

A)trilaurin
B)trilinolein
C)tripalmitin
D)triarchadin
E)none of these

Question 36

How many isomers (including stereoisomers)are possible for a triacylglyceride that contains two palmitic acid residues and one stearic acid residue?

A)1
B)2
C)3
D)4
E)5

Question 37

Predict the product(s)for the following reaction.

Question 38

Which of the following is a detergent?

A)I
B)II
C)III
D)IV
E)V

Question 39

Predict the product(s)for the following reaction.

Question 40

An optically inactive triglyceride produced two palmitic acid residues and one oleic acid residue,when heated in the presence of acid.Provide the structure(s)for this triglyceride.

A)I
B)II
C)III
D)IV
E)B & C

Question 41

Which of the following is a correct description of the following compound?

A)triglyceride
B)steroid
C)phospholipid
D)prostaglandin
E)terpene

Question 42

Predict the product when estradiol is treated with excess NaH followed by excess bromopropane.

Question 43

Phospholipids that contain ethanolamine are called_____.

A)lecithins
B)phosphatidyl serines
C)plasmalogens
D)cephalins
E)A & D

Question 44

Which one of the following is a used to treat the inflammatory condition caused by arthritis?

A)norethindrone
B)androsterone
C)cortisone
D)lanosterol
E)stanozolol

Question 45

A lipid bilayer is formed by self assembly of _________.

A)triglycerides
B)saturated fatty acids
C)phospholipids
D)unsaturated fatty acids
E)B & C

Question 46

Predict the product when testosterone is treated with PCC.

Question 47

Provide the structure of the lecithin that would produce two stearic acid residues on hydrolysis?

Question 48

In androsterone the A-B ring fusion is ______and the B-C ring fusion is ______.

A)cis,trans
B)cis,cis
C)trans,cis
D)trans,trans
E)none of these

Question 49

Which one of the following is a male sex hormone?

A)estrone
B)androsterone
C)cortisone
D)lanosterol
E)all of these

Question 50

Which of the following are secreted by the adrenal cortex?

A)cortisone
B)androsterone
C)esrone
D)lanosterol
E)estradiol

Question 51

Predict the major product when cholesterol is treated with peroxy acetic acid.

Question 52

Predict the product when cholesterol is treated with acetyl chloride in presence of pyridine.

Question 53

Predict the major product when cholesterol is treated with hydrogen in the presence of a palladium catalyst.

Question 54

Which one of the following is a female sex hormone?

A)estrone
B)androsterone
C)cortisone
D)lanosterol
E)nandrolone

Question 55

Which of the following is a correct numbering of the steroid nucleus?

A)I
B)II
C)III
D)IV
E)none of these

Question 56

Which one of the following is a structure of a phosphatidic acid?

A)I
B)II
C)III
D)IV
E)none of these

Question 57

Phospholipids that contain choline are called_____.

A)lecithins
B)phosphatidyl serines
C)plasmalogens
D)cephalins
E)A & D

Question 58

Draw a chair conformation for the following compound.

Question 59

Provide the structure of the cephalin that would produce two oleic acid residues on hydrolysis?

Question 60

In naturally occurring steroids mostly the B-C ring fusion is ______and the C-D ring fusion is ______.

A)cis,trans
B)cis,cis
C)trans,cis
D)trans,trans
E)none of these

Question 61

Which one of the following is not classified as an eicosanoid?

A)leukotrienes
B)prostaglandins
C)thromboxanes
D)prostacyclins
E)cortisone

Question 62

Which one of the following is a correct representation of PGCs?

A)I
B)II
C)III
D)IV
E)V

Question 63

Which one of the following is a precursor for the synthesis of prostaglandins?

A)arachidonic acid
B)linoleic acid
C)cholesterol
D)linolenic acid
E)all of these

Question 64

Aspirin blocks the biosynthesis of which of the following eicosanoids?

A)leukotrienes
B)prostaglandins
C)thromboxanes
D)prostacyclins
E)C & D

Question 65

Identify the isoprene units in partheniol

Question 66

Lipids containing repeated isoprene units are called________.

A)cephalins
B)terpenes
C)eicosanoids
D)steroids
E)none of these

Question 67

Farnesol isolated from Lily of the Valley flowers,has the following structure.How many isoprene units Farnesol

A)1
B)2
C)3
D)4
E)5

Question 68

Identify the isoprene units in manool.

Question 69

Identify the isoprene units in cedrol found in cedar.

Question 70

Which one of the following is a correct classification of the following compound?

A)steroid
B)prostaglandin
C)triglyceride
D)terpene
E)lecithin

Question 71

Prostaglandins are made up of ___ carbon atoms.

A)14
B)16
C)18
D)20
E)22

Question 72

How many isoprene units does the following compound have?

A)1
B)2
C)3
D)4
E)5

Question 73

Which of the following are synthesized from arachidonic acid?

A)leukotrienes
B)prostaglandins
C)thromboxanes
D)prostacyclins
E)all of these

Question 74

Following is the structure for PGF_{2 $\beta$} What structural feature is represented by 2 $\beta$ ?

A)2 represents the number of double bonds
B) $\beta$ represents the trans relationship between the two OH groups
C) $\beta$ represents the trans relationship between the side chains
D)A & C
E)A & B

Question 75

Which one of the following compounds is classified as a sesquiterpene?

A)I
B)II
C)III
D)IV
E)all of these

Question 76

Which one of the following is a correct representation of PGFs?

A)I
B)II
C)III
D)IV
E)V

Question 77

Following is the structure of zingiberene found in ginger.Identify the isoprene units in zingiberene.

Question 78

Citral is best classified as a ___________.

A)monoterpene
B)diterpene
C)sesquiterpene
D)triterpene
E)tetraterpene

Question 79

Following is the structure of capsanthin found in capsicum.Which of the following is a correct classification of capsanthin?

A)monoterpene
B)diterpene
C)sesquiterpene
D)triterpene
E)tetraterpene

Question 80

Which of the following is not a characteristic of prostaglandins?

A)five membered cyclic ring
B)carbonyl group
C)two side chains
D)hydroxyl group
E)six membered monocyclic ring