Lipids

This question bank verified by Studydeets
All Questions
Filter by:
Question 1
Free
Multiple Choice

Which statement is not true?

Choose correct answer/s
A

Lipids are found in cell membranes.

B

Lipids are soluble in organic solvents.

C

There are many different types of lipids.

D

All lipids contain fatty acids.

E

Some hormones are lipids.

Check answer
Question 2
Free
Multiple Choice

Lipids are compounds that are soluble in ________ .

Choose correct answer/s
A

distilled water

B

normal saline solution

C

glucose solution

D

chloroform

E

oxygen

Check answer
Question 3
Free
Multiple Choice

Which of the following is not a function of lipids in the human body?

Choose correct answer/s
A

energy storage

B

insulation

C

protection

D

chemical messengers

E

pH regulation

Check answer
Question 4
Free
Multiple Choice

Which of the following is a lipid?

Choose correct answer/s
A

cholesterol

B

nicotine

C

aniline

D

lactose

E

collagen

Check answer
Question 5
Free
Multiple Choice

A polyunsaturated fatty acid contains more than one ________ .

Choose correct answer/s
A

carboxyl group

B

hydroxyl group

C

carbonyl group

D

long carbon chain

E

carbon-carbon double bond

Check answer
Question 6
Multiple Choice

The skeletal structure of palmitoleic acid is shown below.Palmitoleic acid is a ________ . image

Choose correct answer/s
A
saturated fatty acid
B
polyunsaturated fatty acid
C
monounsaturated fatty acid
D
strong acid
E
monosaturated fatty acid
To unlock the question
Question 7
Multiple Choice

Unsaturated fatty acids have lower melting points than saturated fatty acids because ________ .

Choose correct answer/s
A
they have fewer hydrogen atoms
B
they have more hydrogen atoms
C
their molecules fit closely together
D
the cis double bonds give them an irregular shape
E
the trans double bonds give them an irregular shape
To unlock the question
Question 8
Multiple Choice

Which of the following is an unsaturated fatty acid?

Choose correct answer/s
A
myristic
B
oleic
C
palmitic
D
stearic
E
lauric
To unlock the question
Question 9
Multiple Choice

Which of the following fatty acids is most likely to be a solid at room temperature?

Choose correct answer/s
A
palmitoleic
B
oleic
C
stearic
D
linoleic
E
linolenic
To unlock the question
Question 10
Multiple Choice

Compared to saturated fatty acids,unsaturated fatty acids have ________ .

Choose correct answer/s
A
longer carbon chains
B
shorter carbon chains
C
higher melting points
D
lower melting points
E
greater intermolecular attraction
To unlock the question
Question 11
Multiple Choice

Waxes are lipids derived from ________ .

Choose correct answer/s
A
a long-chain alcohol and a long-chain fatty acid
B
glycerol and three fatty acids
C
glycerol,fatty acids,phosphate,and an amino alcohol
D
fatty acids,phosphate,and an amino alcohol
E
steroids
To unlock the question
Question 12
Multiple Choice

The skeletal structure below is that of a ________ . image

Choose correct answer/s
A
wax
B
fat
C
glycerophospholipid
D
steroid
E
fatty acid
To unlock the question
Question 13
Multiple Choice

A triacylglycerol that is solid at room temperature is called a(n) ________ .

Choose correct answer/s
A
cephalin
B
lecithin
C
oil
D
wax
E
fat
To unlock the question
Question 14
Multiple Choice

Which of the following lipids will give a single molecule of fatty acid when hydrolyzed?

Choose correct answer/s
A
wax
B
fat
C
glycerophospholipid
D
steroid
E
petroleum
To unlock the question
Question 15
Multiple Choice

Commercially,liquid vegetable oils are converted to solid fats such as margarine by ________ .

Choose correct answer/s
A
hydrogenation
B
hydrolysis
C
hydration
D
oxidation
E
saponification
To unlock the question
Question 16
Multiple Choice

Margarine containing partially hydrogenated soybean oil is solid because ________ .

Choose correct answer/s
A
it contains only saturated fats
B
it contains only trans fatty acids
C
some of its double bonds have been converted to single bonds
D
it contains only cis carbon-carbon double bonds
E
it contains only polyunsaturated fatty acids
To unlock the question
Question 17
Multiple Choice

Palmitic acid is a 16 carbon acid.In a balanced equation,the products of the saponification of tripalmitin (glyceryl tripalmitate)are ________ .

Choose correct answer/s
A
O C image -OH + 3 C image - image image - image -OH
|
CH-OH
|
C image -OH
B
O C image - image image + 3 C image - image image - image -OH
|
CH- image image
|
C image - image image
C
O C image -OH + 3 C image - image image - image - image image
|
CHOH
|
C image -OH
D
O C image -OH + image - image image - image - image image
|
3 CHOH
|
C image -OH
E
O C image - OH + 2 image - image image - image - image image
|
CHOH O
| image
C image -OH + image C- image image -C - image image
To unlock the question
Question 18
Multiple Choice

The products of the acid catalyzed hydrolysis of a fat are ________ .

Choose correct answer/s
A
the esters of fatty acids
B
fatty acids and glycerol
C
salts of fatty acids
D
salts of fatty acids and glycerol
E
glycerophospholipids
To unlock the question
Question 19
Multiple Choice

A double cheeseburger with bacon contains 39 g of fat.Calculate the number of kilocalories from fat.(1 gram of fat = 9 kcal)

Choose correct answer/s
A
4.3 kcal from fat
B
39 kcal from fat
C
71 kcal from fat
D
350 kcal from fat
E
640 kcal from fat
To unlock the question
Question 20
Multiple Choice

Glycerophospholipids can interact both with other lipids and water because they contain ________ .

Choose correct answer/s
A
double bonds
B
polar regions and nonpolar regions
C
glycerol
D
saturated fatty acids
E
cholesterol
To unlock the question