Deck 26: Lipids

Question 1

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

Answer 1

simple

Question 2

______lipids undergo hydrolysis in presence of aqueous acid or base.

Answer 2

complex

Question 3

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

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

Answer 3

fat

Question 4

Which of the following is not a class of complex lipids?

A) waxes
B) prostaglandins
C) triglycerides
D) phospholipids
E) None of these

Question 5

Which one of the following is a class of complex lipids?

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

Question 6

Predict the product(s) when triacontyl hexadecanoate, a major component of beeswax is treated with aqueous NaOH.

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

Question 7

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

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

Question 8

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

Question 9

When triacontyl hexadecanoate, a major component of beeswax was treated with aqueous NaOH, it produced the following two products. Provide the structure of triacontyl hexadecanoate.

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

Question 10

Which one of the following is a class of simple lipids?

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

Question 11

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

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

Question 12

Which one of the following is a simple lipid?

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

Question 13

Which one of the following is a complex lipid?

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

Question 14

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

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

Question 15

Which of the following is not a class of simple lipids?

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

Question 16

Which of the following is a structure of a wax?

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

Question 17

Which of the following fatty acids is not likely to occur in natural source?

A) octadecanoic acid
B) hexadecanoic acid
C) (Z)-9-hexadecenoic acid
D) pentadecanoic acid
E) (Z)- 11-tetradecenoic acid

Question 18

Which of the following statements is (are) true about lipids?

A) Lipids are soluble in nonpolar organic solvents
B) Lipids include waxes, steroids, and triacylglycerides
C) Lipids have little in common except their solubility
D) Many lipids have biological roles
E) all of these

Question 19

When triacontyl hexadecanoate, a major component of beeswax was treated with aqueous NaOH, it produced the following two products. Provide the structure of triacontyl hexadecanoate.

Question 20

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

Question 21

Which one of the following has the highest melting point?

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

Question 22

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 23

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 24

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 25

Predict the product(s) for the following reaction.

Question 26

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

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

Question 27

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 28

Predict the product for the following reaction.

Question 29

Which of the following fatty acid(s) is not likely to be 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 30

How many different structures (including stereoisomers) are possible for a triglyceride 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 31

Predict the product for the following reaction.

Question 32

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

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

Question 33

Which of the following fatty acids is (are) most likely to occur in natural source?

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

Question 34

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 35

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

A) true
B) false

Question 36

Which one of the following has the lowest melting point?

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

Question 37

Which one of the following is classified as a fat?

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

Question 38

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 39

Which one of the following is classified as oil?

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

Question 40

Reaction of triglycerides with a base is ________ reaction.

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

Question 41

Which of the following compounds is (are) used as a detergent?

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

Question 42

Which of the following is the structure of a cephalin that would produce one equivalent of oleic acid and one equivalent of stearic acid residues on hydrolysis?

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

Question 43

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 44

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 45

Why is decanol more efficient at crossing the cell membrane than hexanol?

Question 46

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 47

Predict the product(s) for the following reaction.

Question 48

Phosphoglycerides differ from triglycerides in that one of the three fatty acid residues is replaced by ______ group.

A) a thioester
B) a phosphoester
C) a thiol
D) an alcohol
E) both B & D

Question 49

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 50

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 51

Phospholipids that contain choline are called_____.

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

Question 52

Predict the product(s) for the following reaction.

Question 53

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

Question 54

Predict the product(s) for the following reaction.

Question 55

Phospholipids that contain ethanolamine are called_____.

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

Question 56

Which of the following compounds is (are) used as a soap?

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

Question 57

Which of the following compounds is a phosphatidic acid?

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

Question 58

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

Question 59

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

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

Question 60

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

Question 61

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 62

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 63

Predict the product when testosterone is treated with PCC.

Question 64

Which of the following is an anabolic steroid?

A) cortisone
B) androsterone
C) esrone
D) testosterone
E) progesterone

Question 65

Which one of the following is a male sex hormone?

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

Question 66

Which of the following can be characteristics of prostaglandins?

A) five-membered cyclic ring
B) carbonyl group
C) two side chains
D) hydroxyl group
E) all of these

Question 67

Prostaglandins are made up of ___ carbon atoms.

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

Question 68

Which of the following steroid hormones is secreted by the adrenal cortex?

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

Question 69

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

Question 70

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

Question 71

Which of the following hormones is (are) responsible for controlling secondary sex characteristics in males?

A) testosterone
B) androsterone
C) cortisone
D) estradiol
E) both A & B

Question 72

Draw a chair conformation for the following compound.

Question 73

Male sex hormones are called ______ and female sex hormones are called ____.

Question 74

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

Question 75

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 76

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

Question 77

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

Question 78

Which of the following hormones is (are) responsible for controlling secondary sex characteristics in females?

A) estrone
B) androsterone
C) cortisone
D) estradiol
E) both A & D

Question 79

Which one of the following is a female sex hormone?

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

Question 80

In estrone 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